Ublox SARA-G300 System Integration Manual Download Page 101

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SARA-G3 and SARA-U2 series - System Integration Manual

UBX-13000995 - R26

Design-in

Page 101 of 217

Figure 41 and the components listed in Table 24 show an example of a high reliability power supply circuit,
where the module

VCC

is supplied by a step-down switching regulator capable of delivering to

VCC

pins the

specified maximum peak / pulse current, with low output ripple and with fixed switching frequency in PWM
mode operation greater than 1 MHz.

SARA-G3 / SARA-U2

12V

VIN

RUN

SYNC

BOOST

GND

VCC

GND

Figure 41: Suggested schematic design for the VCC voltage supply application circuit using a step-down regulator

Reference

Description

Part Number - Manufacturer

10 µF Capacitor Ceramic X7R 5750 15% 50 V

C5750X7R1H106MB - TDK

10 nF Capacitor Ceramic X7R 0402 10% 16 V

GRM155R71C103KA01 - Murata

680 pF Capacitor Ceramic X7R 0402 10% 16 V

GRM155R71H681KA01 - Murata

22 pF Capacitor Ceramic C0G 0402 5% 25 V

GRM1555C1H220JZ01 - Murata

10 nF Capacitor Ceramic X7R 0402 10% 16 V

GRM155R71C103KA01 - Murata

470 nF Capacitor Ceramic X7R 0603 10% 25 V

GRM188R71E474KA12 - Murata

22 µF Capacitor Ceramic X5R 1210 10% 25 V

GRM32ER61E226KE15 - Murata

330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m



T520D337M006ATE045 - KEMET

Schottky Diode 40 V 3 A

MBRA340T3G - ON Semiconductor

10 µH Inductor 744066100 30% 3.6 A

744066100 - Wurth Electronics

470 k



Resistor 0402 5% 0.1 W

2322-705-87474-L - Yageo

15 k



Resistor 0402 5% 0.1 W

2322-705-87153-L - Yageo

22 k



Resistor 0402 5% 0.1 W

2322-705-87223-L - Yageo

390 k



Resistor 0402 1% 0.063 W

RC0402FR-07390KL - Yageo

100 k



Resistor 0402 5% 0.1 W

2322-705-70104-L - Yageo

Step-Down Regulator MSOP10 3.5 A 2.4 MHz

LT3972IMSE#PBF - Linear Technology

Table 24: Suggested components for the VCC voltage supply application circuit using a step-down regulator

Summary of Contents for SARA-G300

Page 1: ...les and the SARA U2 GSM EGPRS HSPA cellular modules These modules are complete and cost efficient solutions offering voice and or data communication over diverse cellular radio access technologies in...

Page 2: ...thout the express permission of u blox is strictly prohibited The information contained herein is provided as is and u blox assumes no liability for the use of the information No warranty either expre...

Page 3: ...16018086 SARA U201 63B 00 23 62 A01 01 UBX 17053345 SARA U201 04A 00 23 60 A01 06 UBX 17058162 SARA U201 04B 00 23 60 A01 06 UBX 17058162 SARA U201 ATEX SARA U201 03X 00 23 60 A01 01 UBX 16030157 SARA...

Page 4: ...al provides the necessary information to successfully design in and configure these u blox cellular modules This manual has a modular structure It is not necessary to read it from the beginning to the...

Page 5: ...XT32K 42 1 6 5 Internal 32 kHz signal output 32K_OUT 42 1 7 Antenna interface 43 1 7 1 Antenna RF interface ANT 43 1 7 2 Antenna detection interface ANT_DET 44 1 8 SIM interface 44 1 8 1 U SIM card in...

Page 6: ...verage Manager 94 1 13 21 In Band modem eCall ERA GLONASS 94 1 13 22 SIM Access Profile SAP 95 1 13 23 Power Saving 96 2 Design in 97 2 1 Overview 97 2 2 Supply interfaces 98 2 2 1 Module supply VCC 9...

Page 7: ...G310 modules integration 171 2 15 2 Schematic for SARA G340 SARA G350 modules integration 172 2 15 3 Schematic for SARA U2 series modules integration 173 2 16 Design in checklist 174 2 16 1 Schematic...

Page 8: ...ies production test 191 5 2 Test parameters for OEM manufacturers 191 5 2 1 Go No go tests for integrated devices 192 5 2 2 Functional tests providing RF operation 192 Appendix 195 A Migration between...

Page 9: ...SARA G3 and SARA U2 series System Integration Manual UBX 13000995 R26 Contents Page 9 of 217 Contact 217...

Page 10: ...f internet protocols and access to u blox GNSS positioning chips and modules with embedded A GPS AssistNow Online and AssistNow Offline functionality SARA G310 and SARA G300 are respectively quad band...

Page 11: ...50 1900 1 1 1 9 1 SARA U270 5 76 7 2 85 6 236 8 900 2100 900 1800 2 1 1 1 9 1 SARA U270 ATEX 5 76 7 2 85 6 236 8 900 2100 900 1800 1 1 1 9 1 SARA U280 5 76 7 2 850 1900 1 1 1 9 1 supported by all prod...

Page 12: ...data rate8 SARA U2 series WCDMA CS data up to 64 kbit s DL UL CS Circuit Switched data rate8 SARA U2 series SARA G3 series GSM CS data up to 9 6 kbit s DL UL transparent non transparent mode Table 2 S...

Page 13: ...ns and the available interfaces Memory V_BCKP RTC V_INT I O 32 kHz 26 MHz RF Transceiver Power Management ANT SAW Filter Switch VCC Supply 32 kHz Auxiliary UART SIM UART Power On Reset Cellular BaseBa...

Page 14: ...available interfaces Memory V_BCKP RTC V_INT I O RF transceiver Power Management Cellular BaseBand Processor ANT VCC Supply USB DDC I2C AUX UART SIM card detection SIM UART Power On Reset Digital aud...

Page 15: ...tion The RF section is composed of the following main elements 2G 3G RF transceiver performing modulation up conversion of the baseband I Q signals down conversion and demodulation of the RF received...

Page 16: ...ce in low power idle mode SARA G340 SARA G350 and SARA U2 series modules are equipped with an internal 32 768 kHz crystal connected to the oscillator of the RTC Real Time Clock block that gives the RT...

Page 17: ...ection 1 5 3 for functional description See section 2 2 3 for external circuit design in System PWR_ON All 15 I Power on input High input impedance input voltage level must be properly fixed e g addin...

Page 18: ...ternal circuit design in TXD All 12 I UART data input 1 8 V input Circuit 103 TXD in ITU T V 24 for AT data Mux FOAT on SARA G3 modules for AT data Mux FOAT FW upgrade via EasyFlash tool and diagnosti...

Page 19: ...I 2 C bus data line Access by external test point is recommended See section 1 9 2 for functional description See section 2 6 2 for external circuit design in USB VUSB_DET SARA U2 17 I USB detect inp...

Page 20: ...dset headset hands free mode No internal DC blocking capacitor See section 1 10 1 for functional description See section 2 7 1 for external circuit design in MIC_P SARA G340 SARA G350 49 I Differentia...

Page 21: ...sign in GPIO2 SARA G340 SARA G350 SARA U2 23 I O GPIO 1 8 V GPIO by default configured to provide the custom GNSS supply enable function See section 1 11 for functional description See section 2 8 for...

Page 22: ...active mode When in power off mode the modules can be switched on by PWR_ON RESET_N or RTC alarm see 2 3 1 the module switches from power off to active mode When VCC supply is removed the module swit...

Page 23: ...mode to connected mode Connected A voice call or a data call is in progress The module is ready to communicate with an external device by means of the application interfaces unless power saving config...

Page 24: ...ons 02 onwards provide separate supply inputs over the three VCC pins VCC pins 52 and 53 represent the supply input for the internal RF power amplifier demanding most of the total current drawn of the...

Page 25: ...Operation above extended operating range limit is not recommended and may affect device reliability VCC average current Support with adequate margin the highest averaged VCC current consumption value...

Page 26: ...s are quite less high than the one in the low bands due to the 3GPP transmitter output power specifications During a GSM call current consumption is not so significantly high in receiving or in monito...

Page 27: ...files in GPRS connected mode in the 850 or 900 MHz bands with 2 slots used to transmit and 1 slot used to receive as for the GPRS multi slot class 10 Time ms RX slot unused slot unused slot TX slot TX...

Page 28: ...2G case In the worst scenario corresponding to a continuous transmission and reception at maximum RF output power approximately 250 mW or 24 dBm the average current drawn by the module at the VCC pin...

Page 29: ...m 32 kHz to the 26 MHz used in active mode The time period between two paging block receptions is defined by the network This is the paging period parameter fixed by the base station through broadcast...

Page 30: ...Mode Enabled Idle Mode Enabled 0 44 2 09 s IDLE MODE 20 30 ms ACTIVE MODE Time s Current mA 100 50 0 Time ms Current mA 100 50 0 RX Enabled DSP Enabled Figure 15 VCC current consumption profile versus...

Page 31: ...h characteristics compliant to the one specified in the SARA G3 series Data Sheet 1 or by the 32K_OUT output pin provided by these modules or the SARA G340 and SARA G350 modules except 00 versions whe...

Page 32: ...ption ACTIVE MODE 2G case 0 47 2 12 s 3G case 0 64 5 12 s Paging period Time s Current mA 100 50 0 Time ms Current mA 100 50 0 RX Enabled DSP Enabled Figure 17 VCC current consumption profile versus t...

Page 33: ...et 2 and for SARA G300 SARA G310 modules only when their EXT32K input pin is fed by an external 32 768 kHz signal with proper characteristics specified in the EXT32K pin characteristics table in the S...

Page 34: ...digital interfaces supply output V_INT The same 1 8 V voltage domain used internally to supply the generic digital interfaces of SARA G3 and SARA U2 series modules is also available on the V_INT suppl...

Page 35: ...ltage stabilizes at its nominal value within the normal range The status of the PWR_ON input pin of SARA G3 and SARA U2 series modules while applying the VCC module supply is not relevant during this...

Page 36: ...t is enabled by the integrated power management unit The RESET_N line of SARA G3 series rises suddenly to high logic level due to internal pull up to V_INT The internal reset signal is held low by the...

Page 37: ...line of SARA G3 series rises suddenly to high logic level due to internal pull up to V_INT The internal reset signal is held low by the integrated power management unit the baseband processor core an...

Page 38: ...it for the response with a 30 second timeout iterate it 4 times without resetting or removing the VCC supply of the module and then run the application The Internal Reset signal is not available on a...

Page 39: ...e AT CPWROFF command waiting the command response for a proper time period see the u blox AT Commands Manual 3 and then a proper VCC supply must be held at least until the end of the modules internal...

Page 40: ...switch on event does not occur e g applying a proper low level to the PWR_ON input or applying a proper low level to the RESET_N input and enters not powered mode if the supply is removed from the VC...

Page 41: ...the external The pull up is internally biased by V_INT on SARA G3 modules and is biased by V_BCKP on SARA U2 modules A series Schottky diode is mounted inside the SARA G3 modules increasing the RESET_...

Page 42: ...wered or switched off if the EXT32K input is fed by a proper external 32 kHz signal SARA G3 series Data Sheet 1 describes the detailed electrical characteristics of the EXT32K input pin The 32 kHz ref...

Page 43: ...ANT pin over the operating frequency range reducing as much as possible the amount of reflected power Efficiency 1 5 dB 70 recommended 3 0 dB 50 acceptable The radiation efficiency is the ratio of th...

Page 44: ...d 3 V SIM types are supported activation and deactivation with automatic voltage switch from 1 8 V to 3 V is implemented according to ISO IEC 7816 3 specifications The VSIM supply output pin provides...

Page 45: ...x EasyFlash tool o Trace log capture diagnostic purposes DDC interface27 I2 C bus compatible 1 8 V interface supporting see 1 9 4 o Communication with u blox GNSS positioning chips modules o Communica...

Page 46: ...s Data Sheet 1 and the SARA U2 series Data Sheet 2 SARA G3 and SARA U2 series modules are designed to operate as a 2G or 3G cellular modem which represents the Data Circuit terminating Equipment DCE a...

Page 47: ...ected by SARA U2 modules SARA G3 modules support the automatic frame recognition in conjunction with autobauding SARA U2 modules support the one shot automatic frame recognition in conjunction with on...

Page 48: ...efault on SARA G3 series One shot automatic baud rate detection enabled by default on SARA U2 series AT ICF 0 Automatic frame format recognition enabled by default on SARA G3 series One shot automatic...

Page 49: ...ata from the DTE over the UART see 1 9 1 4 for more details If hardware flow control is enabled then when the CTS line is OFF it does not necessarily mean that the module is in low power idle mode but...

Page 50: ...never possible For more details see the section 1 9 1 4 and the u blox AT Commands Manual 3 AT UPSV command DSR signal behavior If AT S1 is set as it is by default the DSR module output line is set by...

Page 51: ...remote DCE accepts the data call the module DCD line is set to ON and the CONNECT communication baudrate string is returned by the module At this stage the DTE can send characters through the serial...

Page 52: ...ndependently triggers the RI line although the line will not be deactivated between each event As a result the RI line may stay to ON for more than 1 s If an incoming call is answered within less than...

Page 53: ...the DTE 0 Enabled AT K3 OFF ON or OFF Data sent by the DTE should be buffered by the DTE and will be correctly received by the module when RTS is set to ON Data sent by the module is buffered by the m...

Page 54: ...e DTE the UART is disabled after the timeout set by the second parameter of the UPSV AT command for more details see the u blox AT commands Manual 3 On SARA U2 modules when the AT UPSV 1 command is is...

Page 55: ...hen if data has not been received or sent the UART is disabled for 2 1 s on SARA G3 modules or for 2 5 s on SARA U2 modules and afterwards the interface is enabled again The module active mode duratio...

Page 56: ...On SARA G3 modules product versions 00 and 01 the CTS output line indicates the power saving state as illustrated in Figure 28 even with AT UPSV 2 while the CTS output line follows the AT UCTS command...

Page 57: ...W flow control disabled and the RTS line is set OFF On SARA U2 series the TXD input line is configured to wake up the system via data reception only if o AT UPSV 1 is set with hardware flow control di...

Page 58: ...first character is not ignored if the module is in active mode i e the module replies OK or it represents the wake up character if the module is in low power idle mode i e the module does not reply No...

Page 59: ...A G300 SARA G310 modules Channel 5 AT and data not available on SARA G300 SARA G310 modules Channel 6 GNSS tunneling not available on SARA G300 SARA G310 modules Channel 7 SIM Access Profile not avail...

Page 60: ...ng SAP Ethernet over USB Diagnostic Default configuration DDC I 2 C interface functionalities are available 1 Diagnostic I2C AT Data GNSS tunneling SAP Ethernet over USB DDC I 2 C interface functional...

Page 61: ...automatic frame recognition on the auxiliary UART interface 115200 bit s and 8N1 are the default setting SARA U2 modules support the one shot automatic baud rate detection one shot autobauding and th...

Page 62: ...ds Manual 3 so that raw data flow to and from a u blox GNSS receiver connected to the cellular module via I2 C interface is available for more details see the u blox AT Commands Manual 3 UGPRF AT comm...

Page 63: ...C ACM for diagnostics CDC ACM for SAP SIM Access Profile CDC ECM for Ethernet over USB CDC ECM for Ethernet over USB function is not supported by the 00 product version The RI virtual signal is not su...

Page 64: ...vailable with each configuration are summarized in Figure 31 AT UUSBCONF PID Available USB functions Remarks 0 0x1102 o 7 CDC ACM modem COM ports o USB1 AT and data o USB2 AT and data o USB3 AT and da...

Page 65: ...ansfer Interrupt Interface 1 Data EndPoint Transfer Bulk EndPoint Transfer Bulk Function AT and Data Interface 2 Abstract Control Model EndPoint Transfer Interrupt Interface 3 Data EndPoint Transfer B...

Page 66: ...2 series Data Sheet 2 1 9 4 DDC I 2 C interface SARA G300 and SARA G310 modules do not support DDC I2 C interface An I2 C bus compatible Display Data Channel DDC interface for communication with u blo...

Page 67: ...by GPIO4 improves GNSS receiver performance decreasing the Time To First Fix TTFF and thus allowing to calculate the position in a shorter time with higher accuracy When GPS local aiding is enabled th...

Page 68: ...audio signal can be changed with dedicated AT commands for each uplink or downlink path and then stored in two profiles in the non volatile memory see the u blox AT Commands Manual 3 for Audio paramet...

Page 69: ...8 or 4 loudspeaker for the hands free mode The SARA G3 series Data Sheet 1 provides the detailed electrical characteristics of the analog audio downlink path Warning excessive sound pressure from hea...

Page 70: ...rate is fixed at 8 kHz only The main_uplink and main_downlink parameters of the AT USPM command must be properly configured to select the I2 S digital audio interfaces paths for more details see the...

Page 71: ...it data changes on I2 S clock rising edge I2 S receive data changes on I2 S clock falling edge 1 10 2 2 I2 S interface Normal I2 S mode Normal I2 S supports 16 bits word linear Mono interface Sample r...

Page 72: ...er Sidetone Digital Gain DAC ADC Tone Generator AMR Player Hands Free Voiceband Sample Buffer Figure 32 SARA G340 SARA G350 modules audio processing system block diagram The sample based voice band pr...

Page 73: ...set The external digital audio devices can be interfaced directly to the DSP digital processing part via the I2 S digital interface With exception of the speech encoder decoder audio processing can be...

Page 74: ...application note 39 SARA U2 modules audio signal processing algorithms are Speech encoding uplink and decoding downlink The following speech codecs are supported in firmware on the DSP for speech enc...

Page 75: ...filtering UUBF UDBF commands o Hands free algorithms echo cancellation Noise suppression Automatic Gain control UHFP command o Sidetone generation feedback of uplink speech signal to downlink path UST...

Page 76: ...ovide the Network status indication function The Network status indication mode can be provided only on one pin per time it is not possible to simultaneously set the same mode on another pin The pin c...

Page 77: ...vide the GNSS RTC sharing function is set as o Output to provide an RTC Real Time Clock synchronization signal to the u blox GNSS receiver if the first AT UGPS parameter is set to 1 and the first AT U...

Page 78: ...meter gpio_mode of AT UGPIOC command to 11 No GPIO pin is by default configured to provide the Module operating mode indication The pin configured to provide the Module operating mode indication funct...

Page 79: ...All the GPIOs can be configured in tri state with an internal active pull down enabled as a not used pin setting the parameter gpio_mode of UGPIOC AT command to 255 The Pin disabled mode can be provi...

Page 80: ...vide SIM card detection function Can be alternatively configured by the UGPIOC command as Input Output Network Status Indication GNSS Supply Enable Module Operating Mode Indication Pin disabled 34 SAR...

Page 81: ...when roaming to networks not supporting the specific SIM limited service in cells which are not suitable or barred due to operators choices no cell condition when moving to poorly served or highly int...

Page 82: ...AT commands Files are read and stored in the local file system of the module SARA U2 series modules support also Secure File Transfer Protocol functionalities providing SSL encryption For more details...

Page 83: ...cation Code HMAC generation The security aspects used during a connection depend on the SSL TLS configuration and features supported Table 16 contains the settings of the default SSL TLS profile and T...

Page 84: ...A G3 series RSA YES YES PSK YES 37 YES Table 18 Authentication Algorithm SARA U2 series SARA G3 series RC4 NO 39 NO 40 DES YES YES 3DES YES 41 YES AES128 YES YES AES256 YES 41 YES Table 19 Encryption...

Page 85: ...SK_WITH_AES_256_CBC_SHA 0x00 0x8D YES 41 YES TLS_PSK_WITH_3DES_EDE_CBC_SHA 0x00 0x8B YES 41 YES TLS_RSA_PSK_WITH_AES_128_CBC_SHA 0x00 0x94 YES 41 YES TLS_RSA_PSK_WITH_AES_256_CBC_SHA 0x00 0x95 YES 41...

Page 86: ...e measurement is done inside the module the measured value could be different from the environmental temperature Ta Warning area t 1 t 1 t 2 t 2 Valid temperature range Safe area Dangerous area Danger...

Page 87: ...merg call in progress Shut the device down Yes No Yes Yes No No No Yes Send shutdown notification Feature enabled full logic or indication only IF Full Logic Enabled Feature disabled no action Tempera...

Page 88: ...hutdown 95 C Equal to the internal temperature Ti measured in the worst case operating condition at typical supply voltage when the ambient temperature Ta in the reference setup equals the absolute ma...

Page 89: ...and CellLocate Not supported by SARA G300 and SARA G310 versions Although GNSS is a widespread technology reliance on the visibility of extremely weak GNSS satellite signals means that positioning is...

Page 90: ...ion to the CellLocate server when observing a specific cell the As in the picture represent the position of the devices which observed the same cell A 2 CellLocate server defines the area of Cell A vi...

Page 91: ...is implemented through a set of three AT commands that allow GNSS receiver configuration AT ULOCGNSS CellLocate service configuration AT ULOCCELL and requesting the position according to the user conf...

Page 92: ...tails see the u blox AT Commands Manual 3 1 13 15 Multi Level Precedence and Pre emption Service Not supported by SARA G3 series modules Not supported by the 00 product version of SARA U2 module The M...

Page 93: ...ocol Send the new FW image via the used protocol For more details see the Firmware Update Application Note 27 1 13 18 Firmware update Over The Air FOTA Not supported by SARA G3 series modules and SARA...

Page 94: ...les SARA G340 SARA G350 and SARA U2 modules support an In Band modem solution for the European eCall and the Russian ERA GLONASS emergency call applications over cellular networks implemented accordin...

Page 95: ...e is the scenario where a device such as an embedded car phone with an integrated SARA U2 module uses a remote SIM included in an external user device e g a simple SIM card reader or a portable phone...

Page 96: ...ation from the remote SIM followed by an attach operation to the local one if present 1 13 23 Power Saving The power saving configuration is by default disabled but it can be enabled using the AT UPSV...

Page 97: ...urate design is required to guarantee SIM card functionality and compliance with applicable conformance standards reducing also the risk of RF coupling Carefully follow the suggestions provided in sec...

Page 98: ...ure 40 VCC supply concept selection The DC DC switching step down regulator is the typical choice when the available primary supply source has a nominal voltage much higher e g greater than 5 V than t...

Page 99: ...age of more than one DC supply at the same time should be carefully evaluated depending on the supply source characteristics different DC supply systems can result as mutually exclusive The usage of a...

Page 100: ...uency lower than 600 kHz must be carefully evaluated since this can produce noise in the VCC voltage profile and therefore negatively impact GSM modulation spectrum performance An additional L C low p...

Page 101: ...tor Ceramic X7R 0402 10 16 V GRM155R71C103KA01 Murata C3 680 pF Capacitor Ceramic X7R 0402 10 16 V GRM155R71H681KA01 Murata C4 22 pF Capacitor Ceramic C0G 0402 5 25 V GRM1555C1H220JZ01 Murata C5 10 nF...

Page 102: ...E15 Murata C2 100 F Capacitor Tantalum B_SIZE 20 6 3V 15m T520B107M006ATE015 Kemet C3 5 6 nF Capacitor Ceramic X7R 0402 10 50 V GRM155R71H562KA88 Murata C4 6 8 nF Capacitor Ceramic X7R 0402 10 50 V GR...

Page 103: ...he SARA G3 modules by applying VCC supply that otherwise can be switched on by forcing a low level on the RESET_N pin during the VCC rising edge and then releasing the RESET_N pin when the VCC supply...

Page 104: ...0J106ME47 Murata R1 27 k Resistor 0402 5 0 1 W RC0402JR 0727KL Yageo Phycomp R2 4 7 k Resistor 0402 5 0 1 W RC0402JR 074K7L Yageo Phycomp U1 LDO Linear Regulator ADJ 3 0 A LP38501ATJ ADJ NOPB Texas In...

Page 105: ...ies Data Sheet 2 place a bypass capacitor with large capacitance more than 100 F and low ESR near the VCC pins for example 330 F capacitance 45 m ESR e g KEMET T520D337M006ATE045 Tantalum Capacitor Th...

Page 106: ...D_SIZE 6 3 V 45 m T520D337M006ATE045 KEMET C2 100 nF Capacitor Ceramic X7R 0402 10 16 V GRM155R71C104KA01 Murata C3 10 nF Capacitor Ceramic X7R 0402 10 16 V GRM155R71C103KA01 Murata C4 15 pF Capacito...

Page 107: ...Figure 47 describes a possible application circuit C1 C4 GND C3 C2 C5 SARA G3 series except 00 01 versions 52 VCC 53 VCC 51 VCC Li Ion Li Pol Battery C6 SW VIN SHDNn GND FB C7 R1 R2 L1 U1 Step up Regu...

Page 108: ...924U as linear charger is more suitable for applications where the charging source has a relatively low nominal voltage 5 V so that a switching charger is suggested for applications where the charging...

Page 109: ...path management IC Vout Vin Li Ion Li Pol Battery Pack GND System 12 V Primary Source Charge controller DC DC converter and battery FET control logic Vbat Figure 49 Charger regulator with integrated...

Page 110: ...D C11 C10 C13 SARA G3 SARA U2 52 VCC 53 VCC 51 VCC Primary Source R3 U1 EN ILIM ISET TMR AGND VIN C2 C1 12V NTC PGND SW SYS BAT C4 R1 R2 D1 Li Ion Li Pol Battery Pack B1 C5 Li Ion Li Polymer Battery C...

Page 111: ...tter to select the highest operating frequency for the switcher and add a large L C filter before connecting to the SARA G3 and SARA U2 series modules in the worst case If VCC is protected by transien...

Page 112: ...ication circuits a using a 100 F capacitor to let the RTC run for 1 minute after VCC removal b using a 70 mF capacitor to let RTC run for 10 hours after VCC removal c using a non rechargeable battery...

Page 113: ...h provides a 32 kHz signal to the EXT32K input pin as reference clock for the RTC timing so that the modules can enter the low power idle mode and can make available the RTC functions The internal reg...

Page 114: ...Vpp SARA U2 series in low power idle mode when the switching regulator operates in PFM mode It is not recommended to supply sensitive analog circuitry without adequate filtering for digital noise V_IN...

Page 115: ...ain output on the external device with an external pull up resistor e g 100 k biased by the V_BCKP supply pin of the module as described in Figure 52 and Table 33 A compatible push pull output of an a...

Page 116: ...igher protection level can be achieved by mounting an ESD protection e g EPCOS CA05P4S14THSG varistor array close to accessible points Connecting the RESET_N input to an external device e g applicatio...

Page 117: ...ith V_BCKP voltage in the operating range 2 V_BCKP GND SARA G300 SARA G310 31 EXT32K 32 kHz Oscillator GND CLKOUT OE VCC C1 U1 Figure 55 EXT32K application circuit using an external 32 kHz oscillator...

Page 118: ...operating bands o If antenna detection functionality is required select an antenna assembly provided with a proper built in diagnostic circuit with a resistor connected to ground see guidelines in sec...

Page 119: ...ion 4 2 2 For the additional specific guidelines for SARA G340 ATEX SARA G350 ATEX SARA U201 ATEX and SARA U270 ATEX modules integrated in potentially explosive atmospheres see section 2 14 2 4 1 2 Gu...

Page 120: ...pper FR 4 dielectric 1200 um 400 um 400 um Figure 58 Example of 50 coplanar waveguide transmission line design for the described 2 layer board layup If the two examples do not match the application PC...

Page 121: ...to transmission line or crossing the transmission line on buried metal layer Do not route microstrip line below discrete component or other mechanics placed on top layer Two examples of proper RF cir...

Page 122: ...according to the related integrated antenna requirements the ground plane of the application PCB can be reduced to a minimum size that must be similar to one quarter of wavelength of the minimum frequ...

Page 123: ...DMA SMD Antenna 824 960 MHz 1710 2170 MHz 35 0 x 5 0 x 6 0 mm Table 36 Examples of internal surface mount antennas Table 37 lists some examples of possible internal off board PCB type antennas with ca...

Page 124: ...tor 824 960 MHz 1710 2170 MHz 527 x 26 mm Taoglas FW 92 RNT M GSM WCDMA whip monopole Antenna with RP N type M connector 824 960 MHz 1710 2170 MHz 274 x 20 mm Nearson T6150AM GSM WCDMA swivel monopole...

Page 125: ...F KOA Speer J1 SMA Connector 50 Through Hole Jack SMA6251A1 3GT50G 50 Amphenol C3 SARA U2 15 pF Capacitor Ceramic C0G 0402 5 50 V GRM1555C1H150J Murata SARA G3 0 jumper 0402 Various Manufacturers L2 S...

Page 126: ...reduction of module RF performance The choke inductor should exhibit a parallel Self Resonance Frequency SRF in the range of 1 GHz to improve the RF isolation of load resistor For example Consider an...

Page 127: ...0 transmission line implementing the design guidelines described in section 2 4 1 and the recommendations of the SMA connector manufacturer DC blocking capacitor at the ANT pin C2 is placed in series...

Page 128: ...for applications where the SIM changing is required during the product lifetime A SIM card holder can have 6 or 8 positions if a mechanical card presence detector is not provided or it can have 6 2 or...

Page 129: ...pF ESD protection e g Tyco Electronics PESD0402 140 on each externally accessible SIM line close to each related pad of the SIM connector the ESD sensitivity rating of the SIM interface pins is 1 kV...

Page 130: ...pacitor of about 22 pF to 47 pF e g Murata GRM1555C1H470J on each SIM line VSIM SIM_CLK SIM_IO SIM_RST to prevent RF coupling especially in case the RF antenna is placed closer than 10 30 cm from the...

Page 131: ...o each related pad of the SIM connector to prevent RF coupling especially in case the RF antenna is placed closer than 10 30 cm from the SIM card holder Provide a low capacitance i e less than 10 pF E...

Page 132: ...r SIM chips as well providing proper connection between SIM switch and SIM chip as described in Figure 63 If it is required to switch between more than two SIMs a circuit similar to the one described...

Page 133: ...o long connection can cause the radiation of some harmonics of the digital data frequency as any other digital interface keep the traces short and avoid coupling with RF line or sensitive analog input...

Page 134: ...DTE DCE serial communication 1 8 V DTE If a 3 0 V Application Processor DTE is used then it is recommended to connect the 1 8 V UART interface of the module DCE by means of appropriate unidirectional...

Page 135: ...DTE is used then it is recommended to connect the 1 8 V UART interface of the module DCE by means of appropriate unidirectional voltage translators using the module V_INT output as 1 8 V supply for t...

Page 136: ...ed by the RTS line as described in section 1 9 1 4 reaching very low current consumption With this configuration when the module is in idle mode the UART is re enabled 20 ms after RTS has been set ON...

Page 137: ...in section 1 9 1 4 reaching low current consumption With this configuration when the module is in idle mode data transmitted by the DTE will be buffered by the DTE and will be correctly received by th...

Page 138: ...R 7 RI 8 DCD GND 1V8 B1 A1 GND U1 VCCB VCCA Unidirectional Voltage Translator C1 C2 3V0 DIR1 DIR2 OE VCC B2 A2 RTS CTS 10 RTS 11 CTS TP 0 TP 0 TP 0 TP TP Figure 73 UART interface application circuit w...

Page 139: ...y output of the cellular module Consider the value of the pull up integrated at each input of the DTE if any and the baud rate required by the application for the appropriate selection of the resistan...

Page 140: ...EasyFlash tool and for diagnostic purposes It is highly recommended to provide direct access to the TXD_AUX RXD_AUX pins of SARA G3 modules for execution of firmware upgrade over auxiliary UART using...

Page 141: ...ARA G3 modules firmware upgrade over the auxiliary UART interface using the u blox EasyFlash tool Any external signal connected to the auxiliary UART interface must be tri stated or set low when the m...

Page 142: ...oint on the line connected to this pin as described in Figure 76 and Table 49 The USB interface pins ESD sensitivity rating is 1 kV Human Body Model according to JESD22 A114F A higher protection level...

Page 143: ...ce ZCM is as close as possible to 30 Consider design rules for USB_D USB_D similar to RF transmission lines being them coupled differential micro strip or buried stripline avoid any stubs abrupt chang...

Page 144: ...l ups to the V_INT 1 8 V supply source or another supply source enabled after V_INT e g as the GNSS 1 8 V supply present in Figure 79 application circuit as any external signal connected to the DDC I2...

Page 145: ...to recover from a power breakdown with either a hot start or a warm start depending on the actual duration of the GNSS VCC outage and to maintain the configuration settings saved in the backup RAM SAR...

Page 146: ...wer u blox GNSS receiver generation without TCXO Additional filtering may be needed to properly supply an external LNA depending on the characteristics of the used LNA adding a series ferrite bead and...

Page 147: ...g a suitable Unidirectional General Purpose Voltage Translator e g TI SN74AVC2T245 which additionally provides the partial power down feature so that the 3 0 V GNSS supply can be also ramped up before...

Page 148: ...blox 1 8 V GNSS receiver u blox GNSS 3 0 V receiver 24 GPIO3 1V8 B1 A1 GND U3 B2 A2 VCCB VCCA Unidirectional Voltage Translator C4 C5 3V0 TxD1 R1 IN OUT GNSS LDO Regulator SHDNn R2 VMAIN 3V0 U1 23 GP...

Page 149: ...wo resistance in one leg R2 R3 should be equal to the ratio of the two resistance in the other leg R4 MIC i e R2 must be equal to R4 e g 2 2 k and R3 must be equal to the microphone nominal intrinsic...

Page 150: ...nector J2 Microphone Connector MIC J1 D4 D2 Figure 83 Analog audio interface headset and handset mode application circuit Reference Description Part Number Manufacturer C1 10 F Capacitor Ceramic X5R 0...

Page 151: ...ration of the internal regulator Connect the reference of the microphone circuit to the MIC_GND pin of the module as a sense line Provide a proper series capacitor at both MIC_P and MIC_N analog uplin...

Page 152: ...1H270JA01 Murata C8 C9 47 nF Capacitor Ceramic X7R 0402 10 16V GRM155R71C473KA01 Murata D1 D2 D3 D4 Low Capacitance ESD Protection CG0402MLE 18G Bourns J1 Microphone Connector Various Manufacturers J2...

Page 153: ...blocking e g 10 F to decouple the bias present at the module input as described in the left side of Figure 85 Guidelines for the connection to a single ended analog audio output A proper single ended...

Page 154: ...es away from module VCC supply line any switching regulator line RF antenna lines digital lines and any other possible noise source Avoid coupling between microphone and speaker receiver lines Optimiz...

Page 155: ...nd microphone lines Optimize the mechanical design of the application device the position orientation and mechanical fixing for example using rubber gaskets of speaker and microphone parts in order to...

Page 156: ...nment mode or o 16 x 2 x I2S_sample_rate in Normal I2 S mode long alignment mode Compatible voltage levels 1 80 V typ otherwise it is recommended to connect the 1 8 V digital audio interface of the mo...

Page 157: ...ay depend on the specific application board design R2 R1 GND U1 SARA U2 series Audio Codec 26 SDA 27 SCL SDA SCL 19 CODEC_CLK MCLK GND R3 C3 C2 C1 4 V_INT VDD 1V8 MICBIAS C4 R4 C5 C6 EMI1 MICLN MICLP...

Page 158: ...dules with an external audio codec Any external signal connected to the I2 S interface must be tri stated or set low when the module is in power down mode and during the module power on sequence at le...

Page 159: ...facturers U1 Voltage Regulator for GNSS receiver See GNSS module Hardware Integration Manual R2 10 k Resistor 0402 5 0 1 W Various manufacturers R3 47 k Resistor 0402 5 0 1 W Various manufacturers R4...

Page 160: ...ARA U2 33 RSVD RSVD Figure 89 Application circuit for the reserved pins RSVD 2 10 Module placement Optimize placement for minimum length of RF line and closer path from DC source for VCC Make sure tha...

Page 161: ...lication production process requirements K M1 M1 M2 E G H J E ANT pin B Pin 1 K G H J A D D O O L N L I F F K M1 M1 M2 E G H J E ANT pin B Pin 1 K G H J A D D O O L N L I F F Stencil 150 m Figure 90 S...

Page 162: ...ology the module reduces the transmitted power when the temperature internally sensed in the integrated 3G Power Amplifier approaches the maximum allowed internal temperature to guarantee device funct...

Page 163: ...e SARA U2 series Data Sheet 2 The effect of lower Rth M A due to the installation of a robust heat sink on the backside of the application board with forced air ventilation can be seen from the module...

Page 164: ...he ESD immunity test to the relative device ports or the relative interconnecting cables to auxiliary equipments depends on device accessible interfaces and manufacturer requirements as defined by ETS...

Page 165: ...in any device that integrates a SARA G3 and SARA U2 series module according to the application board classification see ETSI EN 301 489 1 20 to satisfy the requirements for ESD immunity test summariz...

Page 166: ...erface functionality when an electrostatic discharge is applied to the application board enclosure It is suggested to use as short as possible connection lines at the SIM pins Maximum ESD sensitivity...

Page 167: ...for use in subdivision IIA typical gases are industrial methane propane petrol and the majority of industrial gases subdivision IIC IIB intended for use in areas where the nature of the explosive gas...

Page 168: ...atmosphere to a level below that which can cause ignition by either sparking or heating effects The following input and equivalent parameters must be considered integrating a SARA G340 ATEX a SARA G3...

Page 169: ...devices are considered to be an infallible assembly For Level of Protection ia three independent active voltage limitation semiconductor circuits may be used in associated apparatus provided the trans...

Page 170: ...The maximum average power of SARA U270 ATEX according to the WCDMA power class stated in Table 3 is 250 mW The RF threshold power of the application device integrating a SARA G340 ATEX a SARA G350 ATE...

Page 171: ...00 SARA G310 52 VCC 53 VCC 51 VCC 100 F 2 V_BCKP GND GND GND RTC back up 1 8V DTE 1 8V DTE 16 RSVD 18 RESET_N Application Processor Open Drain Output 15 PWR_ON 100k Open Drain Output TXD RXD 29 TXD_AU...

Page 172: ...lox 1 8 V GNSS Receiver 4 7k OUT IN GND LDO Regulator SHDN SDA SCL 4 7k 3V8 1V8_GPS SDA2 SCL2 GPIO3 GPIO4 TxD1 EXTINT0 26 27 24 25 47k VCC GPIO2 23 1 8V Digital Audio Device I2S_RXD I2S_CLK I2S Data O...

Page 173: ...ndicator 18 RESET_N Application Processor Open Drain Output 15 PWR_ON 100k Open Drain Output D D 29 USB_D 28 USB_D u blox 1 8 V GNSS Receiver 4 7k OUT IN GND LDO Regulator SHDN SDA SCL 4 7k 3V8 1V8_GP...

Page 174: ...GPIO3 and I2 S pins V_INT pin RESET_N and or PWR_ON pins for module FW upgrade by the u blox EasyFlash tool and or for diagnostic purposes Provide accessible test points directly connected to the fol...

Page 175: ...r grounding Optimize placement for minimum length of RF line and closer path from DC source for VCC Design USB_D USB_D connection as 90 differential pair with 30 common mode impedance Route analog aud...

Page 176: ...king station or a large manufacturing area The main principle of an EPA is that there are no highly charging materials near ESD sensitive electronics all conductive materials are grounded workers are...

Page 177: ...Guidelines for temperature profiling for mass soldering reflow and wave processes published 2001 Reflow profiles are to be selected according to the following recommendations Failure to observe these...

Page 178: ...3 Optical inspection After soldering the SARA G3 and SARA U2 series modules inspect the modules optically to verify that the module is properly aligned and centered 3 3 4 Cleaning Cleaning the solder...

Page 179: ...not provide 100 protection for the module from coating liquids with low viscosity and therefore care is required in applying the coating Conformal coating of the module will void the warranty 3 3 10 C...

Page 180: ...the application device that integrates the modules must be approved under all the certification schemes required by the specific application device to be deployed in the market The required certificat...

Page 181: ...posure limits prescribed for an uncontrolled environment for fixed and mobile use conditions This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and t...

Page 182: ...and with the ISED Canada licence exempt RSS standard s Operation is subject to the following two conditions this device may not cause harmful interference this device must accept any interference rec...

Page 183: ...t to the following two conditions o this device may not cause interference o this device must accept any interference including interference that may cause undesired operation of the device Radio Freq...

Page 184: ...entr e correspondant l appareil dans la liste d quipement radio REL Radio Equipment List d ISDE Canada rendez vous sur http www ic gc ca app sitt reltel srch nwRdSrch do lang fra Pour des information...

Page 185: ...bile use conditions This equipment should be installed and operated with a minimum distance of 20 cm between the radiator and the body of the user or nearby persons This transmitter must not be colloc...

Page 186: ...U201 modules Homologation number 04466 15 05903 4 6 Australian Regulatory Compliance Mark SARA G310 00 SARA G350 00 SARA U201 SARA U260 00 SARA U270 00 and SARA U280 03 modules are compliant with the...

Page 187: ...SARA U260 module must declare SARA U260 IFT number into the user manual of the product Alternatively SARA U260 IFT number can also be declared electronically in the product or reported on the product...

Page 188: ...se NCC certification SARA G340 02 SARA G350 SARA U201 and SARA U270 modules are certified by the Taiwanese National Communications Commission NCC NCC ID for SARA G340 02 modules CCAI16Z10060T4 NCC ID...

Page 189: ...G350 ATEX SARA U201 ATEX and SARA U270 ATEX modules is defined in the Operating temperature range section of the SARA G3 series Data Sheet 1 and the SARA U2 series Data Sheet 2 respectively All these...

Page 190: ...for SARA G340 ATEX SARA G350 ATEX SARA U201 ATEX and SARA U270 ATEX two different configurations are allowed for SARA U201 ATEX Parameter SARA G340 ATEX SARA G350 ATEX SARA U201 ATEX SARA U270 ATEX Ui...

Page 191: ...interfaces Measurement and calibration of RF characteristics in all supported bands Receiver S N verification frequency tuning of the reference clock calibration of transmitter and receiver power lev...

Page 192: ...AT Commands Manual 3 AT CSQ command rssi ber parameters These kinds of test may be useful as a go no go test but not for RF performance measurements This test is suitable to check the communication w...

Page 193: ...check other device interfaces on which RF performance depends To avoid module damage during transmitter test a proper antenna according to module specifications or a 50 termination must be connected t...

Page 194: ...damaging caused by an inappropriate use of this feature 2 Trigger TX GMSK burst at maximum PCL o To check if the power supply is correctly assembled and is able to deliver the required current 3 Trig...

Page 195: ...DCD DTR GND RTS CTS TXD RXD GND VUSB_DET PWR_ON GPIO1 GPIO2 RESET_N GPIO3 GPIO4 GND 26 27 USB_D USB_D 40 39 RSVD MIC_P RSVD MIC_N 28 29 30 31 32 33 34 35 36 37 38 76 75 74 73 72 71 70 69 68 67 66 LISA...

Page 196: ...GPRS full feature set select the SARA G350 module For dual band GSM GPRS full feature set select the SARA G340 module For quad band GSM GPRS reduced feature set select the SARA G310 module For dual b...

Page 197: ...8 V interface supporting PCM and Normal I2S modes master role and fixed sample rate Check internal active pull up down values at digital interface input pins and the current capability of digital inte...

Page 198: ...nt consumption figures The voltage provided must be within the normal operating range limits to allow module switch on and must be above the minimum limit of the extended operating range to avoid modu...

Page 199: ...R_ON falling edge i e low pulse is required for LISA series but it is not required for SARA External pull up is not needed for LISA C2 series since internal pull up is provided Module power off SARA a...

Page 200: ...900 1950 2000 2050 2100 2150 2200 824 960 1710 1990 SARA G310 SARA G350 900 800 850 900 950 900 1800 1800 1700 1750 1800 1850 1900 1950 2000 2050 2100 2150 2200 880 960 1710 1880 SARA G300 SARA G340 8...

Page 201: ...ction A 4 5 Serial interfaces UART interface The same compatible external circuit can be implemented for SARA and LISA modules a 1 8 V unbalanced asynchronous serial port with RS 232 functionality is...

Page 202: ...tial analog audio output is provided on the SPK_P SPK_N pins of SARA G340 SARA G350 LISA U120 LISA U130 modules 16 ohm load capable and LISA C2 series modules 32 ohm load capable SARA G300 SARA G310 L...

Page 203: ...tics 1 8 V typ 3 mA max Input op range 1 0 V 1 9 V V_INT 4 Output characteristics 1 8 V typ 50 mA max 4 Output characteristics 1 8 V typ 50 mA max Output characteristics 1 8 V typ 50 mA max Output cha...

Page 204: ...trength 6 mA 1 8 V RI output Driver strength 4 mA 1 8 V RI output Driver strength 2 mA DCD 8 1 8 V DCD output Driver strength 6 mA 11 Not Available 1 8 V DCD output Driver strength 4 mA 1 8 V DCD outp...

Page 205: ...U120 U130 only Differential input 100 nF internal capacitor for DC blocking Not Available SPK_P 44 SARA G340 SARA G350 Differential output 16 ohm load capable 53 Differential output 32 ohm load capab...

Page 206: ...A 1 8 V configurable GPIO Default GNSS supply en Driver strength 1 mA Inner pull down 150 A GPIO3 24 SARA G340 SARA G350 1 8 V configurable GPIO Default GNSS data ready Driver strength 5 mA Inner pul...

Page 207: ...own 200 A GPIO11 Not Available 56 Not Available Not Available 1 8 V configurable GPIO Default SPI_MOSI Driver strength 6 mA Inner pull down 200 A GPIO12 Not Available 57 Not Available Not Available 1...

Page 208: ...I2S_TXD I2S_CLK SIM_CLK SIM_IO VSIM SIM_DET VCC MIC_N SPK_N SIM_RST I2S_RXD I2S_WA GND GND GND GND GND GND GND GND GND ANT_DET ANT SARA G340 SARA G350 Top View Pin 65 96 GND 64 63 61 60 58 57 55 54 2...

Page 209: ...up 8 k No functional difference 13 RXD UART Data Output 1 8 V Driver strength 6 mA RXD UART Data Output 1 8 V Driver strength 6 mA No functional difference 14 GND Ground GND Ground 15 PWR_ON Power on...

Page 210: ...l difference 38 SIM_CLK SIM Clock Output SIM_CLK SIM Clock Output No functional difference 39 SIM_IO SIM Data I O SIM_IO SIM Data I O No functional difference 40 SIM_RST SIM Reset Output SIM_RST SIM R...

Page 211: ...W2 4 V_INT 42 SIM_DET 470k ESD ESD ESD ESD ESD ESD 56 ANT 62 ANT_DET 10k 82nH 33pF Connector 27pF ESD External Antenna 1k TP u blox 1 8V GNSS Receiver 4 7k OUT IN GND LDO Regulator SHDN RSVD SDA RSVD...

Page 212: ...l Processing DSR Data Set Ready DTE Data Terminal Equipment DTM Dual Transfer Mode DTR Data Terminal Ready EMC Electro magnetic Compatibility EMI Electro magnetic Interference ESD Electro static Disch...

Page 213: ...equency RI Ring Indicator RTC Real Time Clock RTS Request To Send SAW Surface Acoustic Wave SDN IN PCN Sample Delivery Note Information Note Product Change Notification SIM Subscriber Identification M...

Page 214: ...n MS conformance specification Part 2 Protocol Implementation Conformance Statement PICS 17 3GPP TS 34 121 2 Technical Specification Group Radio Access Network User Equipment UE conformance specificat...

Page 215: ...eneral requirements 2011 06 35 IEC 60079 11 Explosive atmospheres Part 11 Equipment protection by intrinsic safety i 2011 06 36 IEC 60079 26 Explosive atmospheres Part 26 Equipment with EPL Ga 2006 08...

Page 216: ...r SARA G340 01S SARA G350 01S R12 22 Apr 2015 lpah Extended the document applicability to SARA U270 ATEX Removed audio over USB feature updated MPE limits for FCC approval of SARA U260 and SARA U280 R...

Page 217: ...blox com Regional Office China Beijing Phone 86 10 68 133 545 E mail info_cn u blox com Support support_cn u blox com Regional Office China Chongqing Phone 86 23 6815 1588 E mail info_cn u blox com Su...

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