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GE866-QUAD Hardware User Guide 

1VV0301051 Rev. 11 

–

 2019-12-05 

 

Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.   

Page 37 of 82 

Mod. 0805 2011-07 Rev.2

 

7.

 

Antenna 

The  antenna  connection  and  board  layout  design  are  the  most  important  aspect  in 
the  full  product  design  as  they  strongly  affect  the  product  overall  performance, 
hence  read  carefully  and  follow  the  requirements  and  the  guidelines  for  a  proper 
design. 

7.1.

 

GSM Antenna Requirements 

As suggested on the Product Description the antenna and antenna transmission line 
on PCB for a Telit GE866-QUAD device shall fulfill the following requirements: 

 

ANTENNA REQUIREMENTS 

Frequency range 

824-894 MHz GSM850 band 
880-960 MHz GSM900 band  
1710-1885MHz DCS1800 band  
1850-1990MHz PCS1900 band 

Gain 

1.4dBi @ GSM900 and 3dBi @ DCS1800 
1.4dBi @ GSM850 and 3dBi @ PCS1900 

Impedance 

50 Ohm 

Input power 

> 2 W  

VSWR absolute max 

≤  10:1 (limit to avoid permanent damage) 

VSWR recommended 

≤   2:1 (limit to fulfill all regulatory requirements) 

 

7.1.1.

 

GE866-QUAD Antenna 

–

 PCB line Guidelines 

When  using  the  Telit  GE866-QUAD  module,  since  there's  no  antenna  connector  on 
the  module,  the  antenna  must  be  connected  to  the  GE866-QUAD  through  the  PCB 
with the antenna pad (pin G2). 

 

WARNING: 

High  Frequency  harmonics  may  still  not  be  sufficiently  attenuated  in  the  GE866’s 

small  package.  The  suggested  Pi  network,  between  antenna  output  of  the  module 
and  antenna  connector  on  application  board,  is  used  to  meet  the  standard 
specifications.  

In first designs its use is strongly recommended. 

Содержание GE866-QUAD

Страница 1: ...GE866 QUAD Hardware User Guide 1VV0301051 Rev 11 2019 12 05...

Страница 2: ...User Guide 1VV0301051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 2 of 82 Mod 0805 2011 07 Rev 2 APPLICABILITY TABLE...

Страница 3: ...ntries preserve for Telit and its licensors certain exclusive rights for copyrighted material including the exclusive right to copy reproduce in any form distribute and make derivative works of the co...

Страница 4: ...system or translated into any language or computer language in any form or by any means without prior written permission of Telit High Risk Materials Components units or third party products used in...

Страница 5: ...2 3 GE866 QUAD Mechanical Dimensions 13 4 GE866 QUAD module connections 14 4 1 PIN OUT 14 4 2 Pin Layout 17 5 Hardware Commands 18 5 1 Auto Turning ON the GE866 QUAD 18 5 2 Turning OFF the GE866 QUAD...

Страница 6: ...al 43 9 Serial Ports 44 9 1 Modem Serial Port 44 9 2 RS232 levels translation 46 10 Audio Section Overview 48 10 1 MIC Connection 48 10 2 LINE IN connection 49 10 3 EAR Connection 51 10 4 Electrical C...

Страница 7: ...1 2 Enabling DAC 64 12 1 3 Low Pass Filter Example 65 12 2 ADC Converter 65 12 2 1 Description 65 12 2 2 Using ADC Converter 66 13 Mounting the GE866 on your Board 67 13 1 General 67 13 2 Module fini...

Страница 8: ...ardware User Guide 1VV0301051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 8 of 82 Mod 0805 2011 07 Rev 2 17 Document...

Страница 9: ...neral contact technical support to report documentation errors and to order manuals contact Telit Technical Support Center TTSC at TS EMEA telit com TS NORTHAMERICA telit com TS LATINAMERICA telit com...

Страница 10: ...a connection and board layout design are the most important parts in the full product design Chapter 8 Logic Level specifications Specific values adopted in the implementation of logic levels for this...

Страница 11: ...grating the module if these points are not followed the module and end user equipment may fail or malfunction Tip or Information Provides advice and suggestions that may be useful when integrating the...

Страница 12: ...the wrong solutions shall be considered as mandatory While the suggested hardware configurations shall not be considered mandatory the information given shall be used as a guide and a starting point...

Страница 13: ...on forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 13 of 82 Mod 0805 2011 07 Rev 2 3 GE866 QUAD Mechanical Dimensions The GE866 QUAD overall dimensions...

Страница 14: ...med SIMIN I Presence SIM input CMOS 1 8V Trace C2 RXD_AUX I Auxiliary UART RX Data CMOS 1 8V C1 TXD_AUX O Auxiliary UART TX Data CMOS 1 8V Prog Data HW Flow Control B2 C109 DCD GPO O Output for Data...

Страница 15: ...TX I O GPIO03 GPIO I O pin Digital Audio Interface TX CMOS 1 8V D5 GPIO_04 TX Disable DVI_CLK I O GPIO04 Configurable GPIO TX Disable input Digital Audio Interface CLK CMOS 1 8V B5 GPIO_05 RFTXMON I O...

Страница 16: ...when voltage translation to 1V8 CMOS is needed When its use is necessary it is strongly recommended to connect VAUX through a series resistor as closed as possible to the module in order to reduce the...

Страница 17: ...CD RXD_AUX GND VABTT GND ANT 3 C107 DSR C125 RING GND RESERVED GND GND GND 4 C103 TXD GPIO_06 ALRM BUZZER GPIO_07 STAT_LED RESERVED DAC_OUT ADC_IN RESET 5 C104 RXD GPIO_05 RFTXMON GPIO_01 DVI_WAO GPIO...

Страница 18: ...ter 1000 m seconds the V_AUX PWRMON pin will be at the high logic level and the module can be considered fully operating When the power supply voltage is between 3 22V and 3 4V after 5000 m seconds th...

Страница 19: ...te sequence shall be avoided The reverse procedure applies for powering down the module first disconnect VBATT then VBATT_PA or both at once NOTE In order to prevent a back powering effect it is recom...

Страница 20: ...E866 QUAD Hardware User Guide 1VV0301051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 20 of 82 Mod 0805 2011 07 Rev 2...

Страница 21: ...is case all parts of the module are in OFF condition no power consumption is present Processor turn OFF disconnect the power supply only from the power pin VBATT the power pin VBATT_PA can be connecte...

Страница 22: ...can be used to monitor only the power on but it cannot be used to monitor the power off because it remains high NOTE In order to prevent a back powering effect it is recommended to avoid having any H...

Страница 23: ...current consumption and the time to power SYSHALT to minimum values NOTE Refer to AT command reference guide Fast Sys Halt FASTSYSHALT in order to set up detailed AT command 5 3 1 Fast SYSHALT by Hard...

Страница 24: ...halt and 0 5V is the minimum voltage margin from threshold of hardware reset NOTE Verify carefully the timings and failure voltages levels during system verifications WARNING Ctank associated with low...

Страница 25: ...hat can be drained from the ON pad is 0 15 mA NOTE Do not use any pull up resistor on the RESET line nor any totem pole digital output Using pull up resistor may bring to latch up problems on the GE86...

Страница 26: ...805 2011 07 Rev 2 A simple circuit to do it is NOTE Since the GE866 is a miniaturized form factor device and it is often integrated into small applications with embedded antenna placed close to the mo...

Страница 27: ...ll Rights Reserved Page 27 of 82 Mod 0805 2011 07 Rev 2 NOTE In order to prevent a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the...

Страница 28: ...g Voltage Range 3 40 V 4 20 V Extended Operating Voltage Range 3 10 V 4 50 V NOTE The Operating Voltage Range MUST never be exceeded care must be taken when designing the application s power supply se...

Страница 29: ...200 DCS1800 CSD PL0 150 GPRS class 1 1TX 1RX GPRS Sending data mode GSM900 PL5 200 DCS1800 PL0 140 GPRS class 10 2TX 3RX GPRS Sending data mode GSM900 PL5 330 DCS1800 PL0 250 The GSM system is made i...

Страница 30: ...utomotive Battery 6 3 1 1 5V input Source Power Supply Design Guidelines The desired output for the power supply is 3 8V hence there s not a big difference between the input source and the desired out...

Страница 31: ...This allows the regulator to respond quickly to the current peaks absorption In any case the frequency and Switching design selection is related to the application to be developed due to the fact the...

Страница 32: ...of 82 Mod 0805 2011 07 Rev 2 An example of switching regulator with 12V input is in the below schematic 6 3 1 3 Battery Source Power Supply Design Guidelines The desired nominal output for the power...

Страница 33: ...to the power input in order to save the GE866 QUAD from power polarity inversion Otherwise the battery connector should be done in a way to avoid polarity inversions when connecting the battery The b...

Страница 34: ...n forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 34 of 82 Mod 0805 2011 07 Rev 2 This generated heat will be mostly conducted to the ground plane unde...

Страница 35: ...ss but especially to avoid the voltage drops on the power line at the current peaks frequency of approx 217 Hz that will reflect on all the components connected to that supply introducing the noise fl...

Страница 36: ...Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 36 of 82 Mod 0805 2011 07 Rev 2 The power supply input cables should be kept separate fro...

Страница 37: ...NTS Frequency range 824 894 MHz GSM850 band 880 960 MHz GSM900 band 1710 1885MHz DCS1800 band 1850 1990MHz PCS1900 band Gain 1 4dBi GSM900 and 3dBi DCS1800 1 4dBi GSM850 and 3dBi PCS1900 Impedance 50...

Страница 38: ...nna line loss shall be less than 0 3 dB Antenna line must have uniform characteristics constant cross section avoid meanders and abrupt curves Keep if possible one layer of the PCB used only for the G...

Страница 39: ...nar Waveguide G CPW line has been chosen since this kind of transmission line ensures good impedance control and can be implemented in an outer PCB layer as needed in this case A SMA female connector...

Страница 40: ...session A calibrated coaxial cable has been soldered at the pad corresponding to GE866 QUAD RF output a SMA connector has been soldered to the board in order to characterize the losses of the transmi...

Страница 41: ...rtion Loss of G CPW line plus SMA connector is shown below 7 3 GSM Antenna installation Guidelines Install the antenna in a place covered by the GSM signal Antenna shall not be installed inside metal...

Страница 42: ...Where not specifically stated all the interface circuits work at 1 8V CMOS logic levels The following table shows the logic level specifications used in the GE866 QUAD interface circuits Parameter Min...

Страница 43: ...on the Reset signal must not be used to normally shutting down the device but only as an emergency exit in the rare case the device remains stuck waiting for some network response The RESET is interna...

Страница 44: ...er UART 1 8V Universal Asynchronous Receive Transmit microcontroller UART 3V or other voltages different from 1 8V microcontroller UART 5V or other voltages different from 1 8V Depending from the type...

Страница 45: ...e GE866 QUAD that indicates the module is ready 7 RTS rts_uart A1 Request to Send Input to the GE866 QUAD that controls the Hardware flow control 8 CTS cts_uart B1 Clear to Send Output from the GE866...

Страница 46: ...ignal voltage must be less than 0V and hence some sort of level translation is always required The simplest way to translate the levels and invert the signal is by using a single chip level translator...

Страница 47: ...Reserved Page 47 of 82 Mod 0805 2011 07 Rev 2 An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver MAX218 In this case the chipset is capable to translate directly fr...

Страница 48: ...This sounds strange usually the connection to use in order to reject the common mode is the balanced one In this situation we have to recall that the microphone is a sound to current transducer so the...

Страница 49: ...33pF 100n 100 33pF 33pF 1K 1u MIC MIC GND Vmic 10K 2 5v 10u TELIT MODULE INPUT ADC TIP Since the J FET transistor inside the microphone acts as RF detector amplifier ask vendor for a microphone with a...

Страница 50: ...N LINE_IN If the audio source is not a mike but a different device the following connections can be done Place 100nF capacitor in series with both inputs so the DC current is blocked Place the 33pF 10...

Страница 51: ...iency and thus a big power budget 0 7W being a class D architecture please use some caution see the NOTE below NOTE When the loudspeaker is connected with a long cable an L C filter is recommended Whe...

Страница 52: ...Rev 2 WARNING This The audio output hardware of the GE866 QUAD is based on a Class D amplifier so any singled end output configuration MUST NOT BE USED otherwise the presence of GSM buzzing and low l...

Страница 53: ...ical Characteristics 10 4 1 Input lines Microphone Line in path Line Type Differential Coupling capacitor 100nF Differential input resistance 50k Levels To have 0 dBfs 1KHz Differential input voltage...

Страница 54: ...with default filter max differential output voltage 1120 mVpp 3 14dBm0 differential output voltage 550mVrms 0dBm0 volume increment 2dB per step volume steps 0 10 in default condition Output Volume 20...

Страница 55: ...to chapter 8 The following table shows the available GPIO on the GE866 QUAD Pin Signal I O Function Type Input output current Default State ON_OFF state State during Reset Note C5 GPIO_01 I O Configu...

Страница 56: ...1 8V 1uA 1mA INPUT 0 0 Alternate function C107 DSR A2 GPI_E I Configurable GPI CMOS 1 8V 1uA 1mA INPUT 0 0 Alternate function C108 DTR A1 GPI_F I Configurable GPI CMOS 1 8V 1uA 1mA INPUT 0 0 Alternate...

Страница 57: ...order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE866 QUAD when the module is powered OFF or during an ON OFF tr...

Страница 58: ...ed the line will be HIGH during all the conversation and it will be again LOW after hanged up The line rises up 300ms before first TX burst and will became again LOW from 500ms to 1s after last TX bur...

Страница 59: ...square waves This permits to your application to easily implement Buzzer feature with ringing tones or melody played at the call incoming tone playing on SMS incoming or simply playing a tone or melo...

Страница 60: ...g device with a coil located in the magnetic circuit consisting of a permanent magnet an iron core a high permeable metal disk and a vibrating diaphragm Drawing of the Magnetic Buzzer The disk and dia...

Страница 61: ...by lowering the amplitude of the driving signal the response bandwidth tends to become narrow and vice versa Summarizing Vpp fo Vpp fo The risk is that the fo could easily fall outside of new bandwidt...

Страница 62: ...tion on the network service availability and Call status In the GE866 QUAD modules the STAT_LED usually needs an external transistor to drive an external LED Therefore the status indicated in the foll...

Страница 63: ...mmon profile For full details see AT Commands Reference Guide 80000ST10025a NOTE Don t use the SIM IN function on the same pin where the GPIO function is enabled and vice versa 11 10 RTC Bypass out Th...

Страница 64: ...ver an external low pass filter is necessary Min Max Units Voltage range filtered 0 1 8 Volt Range 0 1023 Steps The precision is 10 bits so if we consider that the maximum voltage is 2V the integrated...

Страница 65: ...r must not be used during POWERSAVING 12 1 3 Low Pass Filter Example 12 2 ADC Converter 12 2 1 Description The on board A D converter is a 11 bit converter It s able to read a voltage level in the ran...

Страница 66: ...unications S p A All Rights Reserved Page 66 of 82 Mod 0805 2011 07 Rev 2 Available on pin F4 12 2 2 Using ADC Converter An AT command is available to use the ADC function The command is AT ADC 1 2 Th...

Страница 67: ...t Communications S p A All Rights Reserved Page 67 of 82 Mod 0805 2011 07 Rev 2 13 Mounting the GE866 on your Board 13 1 General The GE866 modules have been designed in order to be compliant with a st...

Страница 68: ...V0301051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 68 of 82 Mod 0805 2011 07 Rev 2 13 3 Recommended foot print for...

Страница 69: ...E866 QUAD Hardware User Guide 1VV0301051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 69 of 82 Mod 0805 2011 07 Rev 2...

Страница 70: ...2 In order to easily rework the GE866 is suggested to consider on the application a 1 5 mm placement inhibit area around the module It is also suggested as common rule for an SMT component to avoid ha...

Страница 71: ...rved Page 71 of 82 Mod 0805 2011 07 Rev 2 13 4 Stencil Stencil s apertures layout can be the same of the recommended footprint 1 1 we suggest a thickness of stencil foil 120 m 13 5 PCB pad design Non...

Страница 72: ...ea of 0 3 mm around the pads unless it carries the same signal of the pad itself see following figure Holes in pad are allowed only for blind holes and not for through holes Recommendations for PCB pa...

Страница 73: ...lder paste on the described surface plating is better compared to lead free solder paste It is not necessary to panel the application PCB however in that case it is suggested to use milled contours an...

Страница 74: ...5 2011 07 Rev 2 13 8 GE866 Solder reflow Recommended solder reflow profile Profile Feature Pb Free Assembly Average ramp up rate TL to TP 3 C second max Preheat Temperature Min Tsmin Temperature Max T...

Страница 75: ...Temperature 8 minutes max NOTE All temperatures refer to topside of the package measured on the package body surface WARNING The GE866 module withstands one reflow process only WARNING The above solde...

Страница 76: ...Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 76 of 82 Mod 0805 2011 07 Rev 2 14 Packing system 14 1 Packing on reel The GE866 modules...

Страница 77: ...ithout written authorization from Telit Communications S p A All Rights Reserved Page 77 of 82 Mod 0805 2011 07 Rev 2 14 2 Packing on tray The GE866 modules are packaged on trays of 98 pieces each see...

Страница 78: ...01051 Rev 11 2019 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 78 of 82 Mod 0805 2011 07 Rev 2 WARNING These trays can withstand...

Страница 79: ...stomer has to take care of the following conditions a The shelf life of the Product inside of the dry bag is 12 months from the bag seal date when stored in a non condensing atmospheric environment of...

Страница 80: ...product itself Same cautions have to be taken for the SIM checking carefully the instruction for its use Do not insert or remove the SIM when the product is in power saving mode The system integrator...

Страница 81: ...9 12 05 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 81 of 82 Mod 0805 2011 07 Rev 2 16 Conformity assessment issues 16 1 ANATEL Regula...

Страница 82: ...on your Board Rev 4 2014 12 18 Updated Weight Updated Section 6 2 Power Consumption Updated Section 10 1 MIC Connection Updated Section 13 3 Updated Section 14 Packing system Rev 5 2015 01 08 Updated...

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