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LN920 HW Design Guide

1VV0301730 Rev. 1

Page 9 of 81

2021-08-11

Not Subject to NDA

Our aim is to make this guide as helpful as possible. Keep us informed of your comments
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Telit appreciates the user feedback on our information.

Summary of Contents for LN920

Page 1: ...LN920 HW Design Guide 1VV0301730 Rev 1 2021 08 11 Telit Technical Documentation...

Page 2: ...LN920 HW Design Guide 1VV0301730 Rev 1 Page 2 of 81 2021 08 11 Not Subject to NDA APPLICABILITY TABLE PRODUCTS PART NUMBER LN920A12 WW LN920A12xxx LN920A6 WW LN920A6xxx...

Page 3: ...11 Main Features 11 2 3 1 Configuration Pins 12 Block Diagram 14 Transmit Output Power 14 RX Sensitivity 14 Supported Carrier Aggregation combinations 18 2 7 1 Two Carrier Aggregation combinations LN9...

Page 4: ...delines 32 RTC Real Time Clock 33 5 ELECTRICAL SPECIFICATIONS 34 Absolute Maximum Ratings Not Optional 34 Recommended Operating Conditions 34 6 DIGITAL SECTION 35 Logic Levels 36 Power On 37 6 2 1 Ini...

Page 5: ...esign 56 8 2 1 Guidelines of PCB Line for GNSS Antenna 56 8 2 2 Hardware Based Solution for GNSS and LTE Coexistence 57 GNSS Antenna Requirements 58 8 3 1 GNSS Antenna Specifications 58 8 3 2 GNSS Ant...

Page 6: ...Conformit 70 12 3 8 Information on Test Modes and Additional Testing Requirements Informations sur les Modes de Test et les Exigences de Test Suppl mentaires 71 12 3 9 Fcc Additional Testing Part 15...

Page 7: ...LN920 HW Design Guide 1VV0301730 Rev 1 Page 7 of 81 2021 08 11 Not Subject to NDA 15 GLOSSARY 79 16 DOCUMENT HISTORY 80...

Page 8: ...t LN920 module If a specific feature is applicable to a specific product only it will be clearly marked Note LN920 refers to all modules listed in the Applicability Table Audience This document is int...

Page 9: ...1730 Rev 1 Page 9 of 81 2021 08 11 Not Subject to NDA Our aim is to make this guide as helpful as possible Keep us informed of your comments and suggestions for improvements Telit appreciates the user...

Page 10: ...the module integration Note Tip Provides advice and suggestions that may be useful when integrating the module Electro static Discharge Notifies the user to take proper grounding precautions before ha...

Page 11: ...in LTE WCDMA modes conform to the 3GPP specifications Product 3G Bands 4G Bands Region LN920A12 WW 1 2 4 5 8 9 19 1 2 3 4 5 7 8 12 13 14 17 18 19 20 25 26 28 29 30 38 39 40 41 42 43 48 66 71 World Wid...

Page 12: ...signed and qualified by Telit to satisfy environmental and quality requirements Single supply module The module internally generates all its required internal supply voltages RTC Real time clock is su...

Page 13: ...e host side each of the CONFIG_0 to CONFIG_4 pins require a pull up resistor Based on the configuration pins state on the LN920 being tied to GND or lifted to No Connect NC the sensed pins will create...

Page 14: ...2W LTE All Bands except B41 Class 3 0 2W LTE Band41 HPUE support Class 2 0 4W Table 5 TransmitOutput Power Band Mode Class RF power dBm B1 B2 B3 B4 B5 B7 B8 B12 B13 B14 B17 B18 B19 B20 B25 B26 B28 B29...

Page 15: ...LTE FDD B7 LTE FDD B8 LTE FDD B12 LTE FDD B13 LTE FDD B14 LTE FDD B17 LTE FDD B18 LTE FDD B19 LTE FDD B20 LTE FDD B25 LTE FDD B26 LTE FDD B28 LTE FDD B29 LTE FDD B30 LTE FDD B66 LTE FDD B71 LTE TDD B3...

Page 16: ...2 LTE TDD B43 LTE TDD B48 WCDMA B1 WCDMA B2 WCDMA B4 WCDMA B5 WCDMA B8 WCDMA B9 WCDMA B19 Table 8 Product Sensitivity Band REFsens dBm Typical 3GPP REFsens dBm LTE Band1 TBD 100 0 LTE Band2 TBD 98 0 L...

Page 17: ...6 TBD 96 5 LTE Band71 TBD 94 2 Table 9 Reception Sensitivity LN920A6 WW LN920A12 WW 3GPP TS 36 521 1 Release 16 Table 7 3 3 1 Reference sensitivity QPSK PREFSENS Channel bandwidth 10MHz LTE Rx Sensiti...

Page 18: ...3A 32A CA_1A 3A 38A CA_1A 3A 40A CA_1A 3A 41A CA_1A 3A 42A CA_1A 3A 5A CA_1A 3A 7A CA_1A 3A 8A CA_1A 41A 42A CA_1A 41C CA_1A 42C CA_1A 5A 38A CA_1A 5A 40A CA_1A 5A 7A CA_1A 7A 20A CA_1A 7A 28A CA_1A...

Page 19: ...A CA_40D CA_41A 41C CA_41A 42C CA_41C 42A CA_41D CA_42D CA_48D CA_5A 12B CA_5A 29A 30A CA_5A 30A 66A CA_5A 40A 40A CA_5A 40C CA_5A 5A 66A CA_5A 66A 66A CA_5A 66B CA_5A 66C CA_5A 7A 7A CA_5A 7C CA_5B 3...

Page 20: ...guarantees its modules to comply with all 3GPP requirements and to have full functionality of the module with in this range 40 C 85 C Telit guarantees full functionality within this range as well How...

Page 21: ...81 2021 08 11 Not Subject to NDA 2 9 2 RoHS Compliance As a part of the Telit corporate policy of environmental protection the LN920 complies with the RoHS Restriction of Hazardous Substances directi...

Page 22: ...1 8V 2 85V Power 34 UIM1_DATA I O Data connection with an external UIM1 card 1 8V 2 85V 32 UIM1_CLK O Clock output to an external UIM1 card 1 8V 2 85V 30 UIM1_RESET O Reset output to an external UIM1...

Page 23: ..._GPIO5 I O I2S_CLK Can be configured as GPIO5 1 8V 22 DIN_GPIO6 I I2S_DIN Can be configured as GPIO6 1 8V 24 DOUT_GPIO7 O I2S_DOUT Can be configured as GPIO7 1 8V 28 WS_GPIO8 I O I2S_WS Can be configu...

Page 24: ...Power GND 3 GND Ground Ground 5 GND Ground Ground 11 GND Ground Ground 27 GND Ground Ground 33 GND Ground Ground 39 GND Ground Ground 45 GND Ground Ground 51 GND Ground Ground 57 GND Ground Ground 71...

Page 25: ...301730 Rev 1 Page 25 of 81 2021 08 11 Not Subject to NDA Pin Signal I O Function Type Comment No Connection 68 NC Table 12 Pin out Information Warning Unless otherwise specified RESERVED pins must be...

Page 26: ...e LN920 signals that must be connected for debugging purposes even if not used by the end application Mandatory Signals Pin Signal Notes 2 4 70 72 74 VPH_PWR 3 5 11 27 33 39 45 51 57 71 73 GND 7 USB_D...

Page 27: ...LN920 HW Design Guide 1VV0301730 Rev 1 Page 27 of 81 2021 08 11 Not Subject to NDA Pin Layout Figure 2 LN920 Pin out...

Page 28: ...ements are as follows Power Supply Value Nominal Supply Voltage 3 3V Supply Voltage Range 3 1 V 3 6 V Maximum ripple on module input supply TBD Table 14 Power Supply Requirements Note The Operating Vo...

Page 29: ...le is not registered on the network AT CFUN 5 Paging cycle 256 frames 2 56s DRx cycle 81 92s eDRx cycle length PTW 2 56s DRX 1 28s 327 68s eDRx cycle length PTW 2 56s DRX 1 28s 655 36s eDRx cycle leng...

Page 30: ...sign Guidelines The electrical design of the power supply strongly depends on the power source where this power is drained We will distinguish them into three categories 5V input typically PC internal...

Page 31: ...esign guidelines useful for developing a product with the LN920 Proper thermal protection design protects against human or component damage for worst case conditions Furthermore it reduces the failure...

Page 32: ...e ripple provided the PCB trace from the capacitor to the LN920 is wide enough to ensure a voltage dropless connection even during an TBD A current peaks The protection diode must be placed close to t...

Page 33: ...ut cables should be kept separate from noise sensitive lines such as microphone earphone cables RTC Real Time Clock The RTC function is provided to keep time information with low power consumption eve...

Page 34: ...A deviation from the value ranges listed below may harm the LN920 module Parameter Parameter Min Max Unit VBATT Battery supply voltage on pin VBATT 0 5 4 2 V Recommended Operating Conditions Parameter...

Page 35: ...n 2 3V for 1 8V CMOS signals LN920 has four main operation states OFF state Vbatt is applied and only RTC is running Baseband is switched OFF and the only transition possible is the ON state ON state...

Page 36: ...TBD TBD Input low level TBD TBD Output high level TBD TBD Output low level TBD TBD Parameter AVG Current characteristics Output Current TBD Input Current TBD Parameter Min Max 1 8V SIM Card Pins Input...

Page 37: ...commended not to communicate with the LN920 during this initialization phase When the AT command interface is accessible via USB port the device might not be yet fully operational In general as shown...

Page 38: ...r more information regarding Shutdown indicator Please refer to the AT Reference guide document for more details about AT SHDNIND command Note To avoid back powering effect it is recommended to avoid...

Page 39: ...is disabled by default The host can use the AT SHDNIND command to assign one of the GPIOs as the Shutdown Indicator pin After enabling the function the corresponding pin operates as a Shutdown Indicat...

Page 40: ...efer to the AT Reference guide document for more details about AT SHDNIND Fast Shutdown is optional function and is disabled by default Host can use the AT FASTSHDN command to assign one of the GPIOs...

Page 41: ...ons High to Low the module has completed power off procedure When the status transitions Low to High the module has completed power on procedure Boot OK Shutdown Indicator Boot OK is optional function...

Page 42: ...the hardware interfaces available of the LN920 module Interface LN920 USB Super speed USB 3 0 with high speed USB 2 0 USIM X2 dual voltage each 1 8V 2 85V Control Signals W_DISABLE1 GPS_DISABLE WOW W...

Page 43: ...s must be carefully routed minimize trace lengths number of vias and capacitive loading The impedance value should be as close as possible to 90 Ohms differential Below table lists the USB interface s...

Page 44: ...onnection with an external UIM1 card 1 85 2 85V 32 UIM1_CLK O Clock output to an external UIM1 card 1 85 2 85V 30 UIM1_RESET O Reset output to an external UIM1 card 1 85 2 85V 66 UIM1_PRESENT I SIM1 d...

Page 45: ...rate how the application interface should be designed Note LN920 contains an internal pull up resistor on SIMIO lines thus it is not necessary to install external pull up resistors 6 5 3 Control Signa...

Page 46: ...d VDD determine the brightness of LED and forward current When VDD is 3 3V and LED s forward voltage is 2 0V it is recommended to use the value of R1 from 66 ohm to 250 Ohm However the resistor value...

Page 47: ...an be connected to the digital output of another device and report its status provided that this device has interface levels compatible with the 1 8V CMOS levels of the GPIO If the digital output of t...

Page 48: ...lent Circuit I2C Inter integrated circuit The LN920 supports an I2C interface on the following pins PIN Signal I O Function Type NOTE 56 I2C_SDA I O I2C Data CMOS 1 8V 58 I2C_SCL O I2C Clock CMOS 1 8V...

Page 49: ...B39 B40 B41 B42 B43 B48 B66 B71 Table 22 Bands Variant TX Output Power Band Mode Class RF power dBm All bands LTE 3 23 2 dB Band41 LTE HPUE 4 26 2 dB All bands WCDMA 3 23 2 dB Table 23 TX Output Power...

Page 50: ...TE Band38 TBD 97 0 LTE Band39 TBD 97 0 LTE Band40 TBD 97 0 LTE Band41 TBD 95 0 LTE Band42 TBD 96 0 LTE Band43 TBD 96 0 LTE Band48 TBD 96 0 LTE Band66 TBD 96 5 LTE Band71 TBD 94 2 Table 25 RX sensitivi...

Page 51: ...d 25 80 MHz in LTE Band 26 100 MHz in LTE Band 28 11 MHz in LTE Band 29 DL only 55 MHz in LTE Band 30 50 MHz in LTE Band 38 40 MHz in LTE Band 39 100 MHz in LTE Band 40 194 MHz in LTE Band 41 200 MHz...

Page 52: ...1 B2 B4 B5 B8 B9 B19 LTE B1 B2 B3 B4 B5 B7 B8 B12 B13 B14 B17 B18 B19 B20 B25 B26 B28 B30 B38 B39 B40 B41 B42 B43 B48 B66 B71 B1 B2 B3 B4 B5 B7 B8 B12 B13 B14 B17 B18 B19 B20 B25 B26 B28 B29 B30 B38 B...

Page 53: ...1 2021 08 11 Not Subject to NDA 7 4 2 Antenna Connector The LN920 Family is equipped with a set of 50 RF MHF 4 Receptacle from I PEX 20449 001E For more information about mating connectors please cons...

Page 54: ...with other signals Table 27 Minimize Antenna Cable Recommendations Warning Impedence of RF connector and RF cable must be matched to 50 Ohm Impedance mismatching will cause poor RF performance especia...

Page 55: ...e device antenna is located farther than 20 cm from the human body and there are no co located transmitters then the Telit FCC IC approvals can be re used by the end product If the device antenna is l...

Page 56: ...ted power supply circuit 8 2 1 Guidelines of PCB Line for GNSS Antenna The following guidelines should be followed when choosing and integrating a GNSS antenna Make sure that the antenna line impedanc...

Page 57: ...The line attenuation will be lower than a buried one 8 2 2 Hardware Based Solution for GNSS and LTE Coexistence When a stand alone GNSS receiver is present in the user application the transmitted LTE...

Page 58: ...to the antenna manufacturer s instructions to obtain the maximum performance from the GNSS receiver The position of the antenna must be carefully evaluated if operating in conjunction with any other...

Page 59: ...LN920 HW Design Guide 1VV0301730 Rev 1 Page 59 of 81 2021 08 11 Not Subject to NDA Table 30 GNSS Characteristics Min Navigation update rate 1Hz...

Page 60: ...1VV0301730 Rev 1 Page 60 of 81 2021 08 11 Not Subject to NDA 9 MECHANICAL DESIGN General The LN920 module was designed to be compliant with a standard lead free SMT process Drawing TBD Figure 7 Mecha...

Page 61: ...ot mandatory GPS_DISABLE WOW WWAN_LED GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 GPIO7 GPIO8 GPIO9 GPIO10 Bypass Capacitor on Power Supplies When a sudden power supply voltage variation or interruption the s...

Page 62: ...should be mounted on the application board EMC Recommendations EMC protection on all the pins of LN920 should be designed by application side according to the customer s requirement ESD rating on all...

Page 63: ...VV0301730 Rev 1 Page 63 of 81 2021 08 11 Not Subject to NDA 11 PACKAGING Tray The LN920 module is packaged on trays of TBD pieces each These trays can be used in SMT processes for pick place handling...

Page 64: ...LN920 HW Design Guide 1VV0301730 Rev 1 Page 64 of 81 2021 08 11 Not Subject to NDA Figure 9 Tray Dimensions...

Page 65: ...The full text of the EU declaration of conformity is available at the following internet address https www telit com red Text of 2014 53 EU Directive RED can be found here https eur lex europa eu leg...

Page 66: ...E Applicables Model Mod le Applicable FCC Rules Applicable ISED Rules R gles ISDE applicables LN920A12 WW 47 CFR Part 2 22 24 27 90 RSS 132 Issue3 133 Issue 6 130 Issue 2 139 Issue 3 RSS Gen Issue 5 L...

Page 67: ...with minimum distance of 20 cm between the radiator and your body Le pr sent appareil est conforme l exposition aux radiations FCC ISED d finies pour un environnement non contr l et r pond aux directi...

Page 68: ...eil num rique de classe B est conforme la norme canadienne ICES 003 12 3 5 Antennas Antennes FCC This radio transmitter has been approved by FCC and ISED to operate with the antenna types listed below...

Page 69: ...dicated for that type are strictly prohibited for use with this device Le pr sent metteur radio a t approuv par ISDE pour fonctionner avec les types d antenne num r s ci dessous et ayant un gain admis...

Page 70: ...ntains Transmitter Module FCC ID RI7XX123Z4WW or Contains FCC ID RI7XX123Z4WW for XX123Z4 WW and XX123Z4 WWV Below list of all the models and related FCC ID Model FCC ID LN920A12 WW LN920A6 WW Table 3...

Page 71: ...n on Test Modes and Additional Testing Requirements Informations sur les Modes de Test et les Exigences de Test Suppl mentaires The module has been evaluated in mobile stand alone conditions For diffe...

Page 72: ...15 Subpart B compliance testing with the modular transmitter installed The end product with an embedded module may also need to pass the FCC Part 15 unintentional emission testing requirements and be...

Page 73: ...55 Tx 1312 1513 Rx 1537 1738 400 MHz WCDMA 850 B5 824 849 869 894 Tx 4132 4233 Rx 4357 4458 45 MHz WCDMA 900 B8 880 915 925 960 Tx 2712 2863 Rx 2937 3088 45 MHz WCDMA 1800 B9 1750 1784 8 1845 1879 8 T...

Page 74: ...46 Tx 23730 23849 Rx 5730 5849 30 MHz LTE 800 B19 830 845 875 890 Tx 24000 24149 Rx 6000 6149 45 MHz LTE 800 B20 832 862 791 821 Tx 24150 24449 Rx 6150 6449 41 MHz LTE 1500 B21 1447 9 1462 9 1495 9 15...

Page 75: ...ssarily mean that Telit intends to announce such Telit products programming or services in your country 14 1 1 Copyrights This instruction manual and the Telit products described herein may include or...

Page 76: ...cument is owned by Telit and its licensors It is furnished by express license agreement only and shall be used exclusively in accordance with the terms of such agreement 14 2 2 Copyrighted Materials T...

Page 77: ...PARTICULAR PURPOSE NO THIRD PARTY LICENSORS OF OTHER CODES MUST BE LIABLE FOR ANY DIRECT INDIRECT INCIDENTAL SPECIAL EXEMPLARY OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT LIMITATION LOST OF PROFITS HOW...

Page 78: ...ion for its use Do not insert or remove the SIM when the product is in power saving mode The system integrator is responsible for the functioning of the final product Therefore the external components...

Page 79: ...Access HSIC High Speed Inter Chip HSUPA High Speed Uplink Packet Access I O Input Output MISO Master Input Slave Output MOSI Master Output Slave Input MRDY Master Ready PCB Printed Circuit Board RTC...

Page 80: ...Guide 1VV0301730 Rev 1 Page 80 of 81 2021 08 11 Not Subject to NDA 16 DOCUMENT HISTORY Revision Date Changes 0 2021 06 30 First Draft 1 2021 08 11 Carrier Aggregation CA combinations tables added From...

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