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Quectel EG25-G Hardware Design

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EG25-G Mini PCIe
Hardware Design
LTE Standard Module Series
Rev. EG25-G_Mini_PCIe_Hardware_Design_V1.2
Date: 2020-04-29
Status: Released
www.quectel.com

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  • Page 1 EG25-G Mini PCIe Hardware Design LTE Standard Module Series Rev. EG25-G_Mini_PCIe_Hardware_Design_V1.2 Date: 2020-04-29 Status: Released www.quectel.com...
  • Page 2 QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION.

  • Page 3: About The Document

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design About the Document Revision History Version Date Author Description Lorry XU/ 2019-11-21 Initial Ethan SHAN Reserved COEX UART Interface. Updated supported protocols (Table 2). Added operating modes of the module (Chapter 3.1).

  • Page 4: Table Of Contents

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Contents About the Document ........................... 2 Contents ............................... 3 Table Index ..............................5 Figure Index ..............................6 Introduction ............................7 1.1. Safety Information........................8 Product Concept ..........................9 2.1. General Description ........................9 2.2.
  • Page 5 Thermal Consideration ......................47 Dimensions and Packaging ......................49 7.1. General Description ......................... 49 7.2. Mechanical Dimensions of EG25-G Mini PCIe ............... 49 7.3. Standard Dimensions of Mini PCI Express ................50 7.4. Packaging Specifications ......................51 Appendix A References ........................52...
  • Page 6 Table 19: Power Supply Requirements ...................... 38 Table 20: I/O Requirements ........................39 Table 21: EG25-G Mini PCIe Conducted RF Output Power ..............39 Table 22: EG25-G Mini PCIe Conducted RF Receiving Sensitivity ............40 Table 23: ESD Characteristics of EG25-G Mini PCIe ................42 Table 24: Current Consumption of EG25-G Mini PCIe ................
  • Page 7 Figure 17: Space Factor of Mating Plugs (Unit: mm) ................. 37 Figure 18: Reference Heatsink Design ...................... 48 Figure 19: Mechanical Dimensions of EG25-G Mini PCIe ................. 49 Figure 20: Standard Dimensions of Mini PCI Express ................50 Figure 21: Dimensions of the Mini PCI Express Connector (Molex 679105700) ........51...

  • Page 8: Introduction

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Introduction This document defines EG25-G Mini PCIe module, and describes its air interfaces and hardware interfaces which are connected with customers’ applications. This document helps customers quickly understand module interface specifications, electrical characteristics, mechanical specifications and other related information of the module.

  • Page 9: Safety Information

    The following safety precautions must be observed during all phases of operation, such as usage, service or repair of any cellular terminal or mobile incorporating EG25-G Mini PCIe module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product.

  • Page 10: Product Concept

    Wireless Router and Switch  Other Wireless Terminal Devices 2.2. Module Description The following table shows the supported frequency bands, GNSS and digital audio functions of EG25-G Mini PCIe module. Table 1: Description of EG25-G Mini PCIe Frequency Bands/ GNSS/...

  • Page 11: Key Features

    GNSS (Optional) GPS, GLONASS, BeiDou (Compass), Galileo, QZSS Digital Audio (PCM) Supported 2.3. Key Features The following table describes the detailed features of EG25-G Mini PCIe module. Table 2: Key Features of EG25-G Mini PCIe Features Description Function Interface PCI Express Mini Card 1.2 Standard Interface Supply voltage: 3.0–3.6 V...
  • Page 12 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Max 107 kbps (DL), Max 85.6 kbps (UL) EDGE: Support EDGE multi-slot class 33 (33 by default) Support GMSK and 8-PSK for different MCS (Modulation and Coding Scheme) Downlink coding schemes: CS 1-4 and MCS 1-9 Uplink coding schemes: CS 1-4 and MCS 1-9 Max 296 kbps (DL), Max 236.8 kbps (UL)
  • Page 13 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Data update rate: 1 Hz by default Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT AT Commands commands Size: (51.0 ± 0.15) mm × (30.0 ± 0.15) mm × (4.9 ± 0.2) mm Physical Characteristics Weight: approx.

  • Page 14: Functional Diagram

    Figure 1: Functional Diagram NOTE There are two types of EG25-G Mini PCIe, with or without integrated (U)SIM card connector, which is optional. The integrated (U)SIM card connector shares the same (U)SIM bus with the external (U)SIM card connector that connected to Mini PCI Express (U)SIM interface. It does not support (U)SIM card detection function, and cannot be used simultaneously with the external (U)SIM card connector.

  • Page 15: Application Interfaces

    EG25-G Mini PCIe Hardware Design Application Interfaces The physical connections and signal levels of EG25-G Mini PCIe comply with PCI Express Mini Card Electromechanical Specification. This chapter mainly describes the definition and application of the following interfaces/pins of EG25-G Mini PCIe: ...

  • Page 16: Pin Description

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design 3.2. Pin Description The following tables show the pin definition and description of the 52 pins on EG25-G Mini PCIe. Table 3: I/O Parameters Definition Type Description Digital Input Digital Output...
  • Page 17 LTE Standard Module Series EG25-G Mini PCIe Hardware Design (U)SIM card Mini card ground Data signal of (U)SIM UIM_DATA USIM_DATA card Connect to REFCLK- UART_RX UART receive data DTE’s TX. Clock signal of UIM_CLK USIM_CLK (U)SIM card Connect to REFCLK+...
  • Page 18 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Require SMB_CLK I2C_SCL I2C serial clock external pull-up to 1.8 V. PETn0 Sleep mode control Require SMB_DATA I2C_SDA I2C serial data external pull-up to 1.8 V. PETp0 RESERVED Reserved Mini card ground...

  • Page 19: Operating Modes

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Mini card ground PCM frame RESERVED PCM_SYNC synchronization 3.0–3.6 V, typically 3.3Vaux VCC_3V3 3.3 V DC supply  NOTE Keep all NC, reserved and unused pins unconnected. 3.1. Operating Modes The following table briefly outlines the operating modes to be mentioned in the following chapters.

  • Page 20: Power Saving

    37, 40, 43, 50 The typical supply voltage of EG25-G Mini PCIe is 3.3 V. In the 2G network, the input peak current may reach 2.7 A during the transmitting time. Therefore, the power supply must be able to provide a rated output current of 2.7 A at least, and a bypass capacitor of no less than 470 µF with low ESR should be...

  • Page 21: U)Sim Interface

    1.8 V (U)SIM card insertion detection EG25-G Mini PCIe supports (U)SIM card hot-plug via the USIM_PRESENCE pin. The function supports low level and high level detections. By default, It is disabled, and can be configured via AT+QSIMDET command. Please refer to document [2] for details about the command.
  • Page 22 LTE Standard Module Series EG25-G Mini PCIe Hardware Design USIM_VDD 100nF Module (U)SIM Card Connector USIM_VDD USIM_RST USIM_CLK USIM_PRESENCE USIM_DATA 33 pF 33 pF 33 pF Figure 4: Reference Circuit of (U)SIM Interface with an 8-pin (U)SIM Card Connector If (U)SIM card detection function is not needed, please keep USIM_PRESENCE unconnected. A reference circuit for (U)SIM interface with a 6-pin (U)SIM card connector is illustrated in the following figure.

  • Page 23: Usb Interface

    (U)SIM card connector. NOTE There are two types of EG25-G Mini PCIe, with or without integrated (U)SIM card connector, which is optional. The integrated (U)SIM card connector shares the same (U)SIM bus with the external (U)SIM card connector that connected to Mini PCI Express (U)SIM interface.

  • Page 24: Uart Interface

    Keep the ESD protection components to the USB connector as close as possible. 3.6. UART Interface EG25-G Mini PCIe provides one main UART interface. The main UART interface supports 9600 bps, 19200 bps, 38400 bps, 57600 bps, 115200 bps and 230400 bps baud rates, and the default is 115200 bps.

  • Page 25: Pcm And I2C Interfaces

    (hardware flow control is disabled by default). Please refer to document [2] for details. 3.7. PCM and I2C Interfaces EG25-G Mini PCIe provides one Pulse Code Modulation (PCM) digital interface and one I2C interface. The following table shows the pin definition of PCM and I2C interfaces that can be applied in audio codec design.
  • Page 26 I2C serial data. I2C_SDA 1.8 V Require external pull-up to 1.8 V. EG25-G Mini PCIe provides one PCM digital interface, which supports 16-bit linear data format and the following modes:  Primary mode (short frame synchronization, works as either master or slave) ...
  • Page 27 2048 kHz PCM_CLK and 8 kHz PCM_SYNC. In addition, EG25-G Mini PCIe’s firmware has integrated the configuration on some PCM codec’s application with I2C interface. Please refer to document [2] for details about AT+QDAI command.

  • Page 28: Control And Indication Signals

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design 3.8. Control and Indication Signals The following table shows the pin definition of control and indication signals. Table 11: Pin Definition of Control and Indication Signals Pin Name Pin No. Power Domain Description 3.3 V...

  • Page 29: W_Disable# Signal

    EG25-G Mini PCIe Hardware Design 3.8.3. W_DISABLE# Signal EG25-G Mini PCIe provides a W_DISABLE# signal to disable or enable the RF function (excluding GNSS). The W_DISABLE# pin is pulled up by default. Its control function for airplane mode is disabled by default, and AT+QCFG=“airplanecontrol”,1 can be used to enable the function.

  • Page 30: Led_Wwan# Signal

    3.8.5. LED_WWAN# Signal The LED_WWAN# signal of EG25-G Mini PCIe is used to indicate the network status of the module, and can absorb a current up to 40 mA. According to the following circuit, in order to reduce the current of the LED, a resistor must be placed in series with the LED.

  • Page 31: Wake# Signal

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Table 14: Indications of Network Status (AT+QCFG="ledmode",0, Default Setting) Pin Status Description Flicker slowly (200 ms Low/1800 ms High) Network searching Flicker slowly (1800 ms Low/200 ms High) Idle Flicker quickly (125 ms Low/125 ms High)

  • Page 32: Gnss Receiver

    NMEA-0183 protocol, and outputs NMEA sentences at 1 Hz data update rate via USB interface by default. By default, EG25-G Mini PCIe GNSS engine is switched off. It has to be switched on via AT command. For more details about GNSS engine technology and configurations, please refer to document [3].

  • Page 33: Gnss Frequency

    Cold start sensitivity: the minimum GNSS signal power at which the module can fix position successfully within 3 minutes after executing cold start command. 4.3. GNSS Frequency The following table shows the GNSS frequency of EG25-G Mini PCIe. Table 16: GNSS Frequency Type...

  • Page 34: Antenna Connection

    Antenna Connection 5.1. Antenna Connectors EG25-G Mini PCIe is mounted with three antenna connectors for external antenna connection: a main antenna connector, an Rx-diversity antenna connector, and a GNSS antenna connector. And Rx-diversity function is enabled by default. The impedance of the antenna connectors is 50 Ω.
  • Page 35 LTE Standard Module Series EG25-G Mini PCIe Hardware Design LTE-FDD B1 1920–1980 2110–2170 LTE-FDD B2 1850–1910 1930–1990 LTE-FDD B3 1710–1785 1805–1880 LTE-FDD B4 1710–1755 2110–2155 LTE-FDD B5 824–849 869–894 LTE-FDD B7 2500–2570 2620–2690 LTE-FDD B8 880–915 925–960 LTE-FDD B12 699–716 729–746...

  • Page 36: Antenna Requirements

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design 5.2. Antenna Requirements The following table shows the requirements on main antenna, Rx-diversity antenna and GNSS antenna. Table 18: Antenna Requirements Type Requirements Frequency range: 1559–1609 MHz Polarization: RHCP or linear VSWR: <...

  • Page 37: Recommended Mating Plugs For Antenna Connection

    EG25-G Mini PCIe Hardware Design 5.3. Recommended Mating Plugs for Antenna Connection EG25-G Mini PCIe is mounted with RF connectors (receptacles) for convenient antenna connection. The dimensions of the antenna connectors are shown as below. Figure 15: Dimensions of the Receptacle RF Connectors (Unit: mm) U.FL-LP mating plugs listed in the following figure can be used to match the receptacles.
  • Page 38 LTE Standard Module Series EG25-G Mini PCIe Hardware Design The following figure describes the space factor of mating plugs. Figure 17: Space Factor of Mating Plugs (Unit: mm) For more details of the recommended mating plugs, please visit http://www.hirose.com. EG25-G_Mini_PCIe_Hardware_Design...

  • Page 39: Electrical, Reliability And Radio Characteristics

    Thermal consideration 6.2. Power Supply Requirements The input voltage of EG25-G Mini PCIe is 3.0–3.6 V, as specified by PCI Express Mini CEM Specifications 1.2. The following table shows the power supply requirements of EG25-G Mini PCIe. Table 19: Power Supply Requirements...

  • Page 40: I/O Requirements

    The maximum voltage value of V for PERST# signal and W_DISABLE# signal is 0.5 V. 6.4. RF Characteristics The following tables show the conducted RF output power and receiving sensitivity of EG25-G Mini PCIe module. Table 21: EG25-G Mini PCIe Conducted RF Output Power Frequency Bands Max.
  • Page 41 GSM specification as described in Chapter 13.16 of 3GPP TS 51.010-1. EG25-G Mini PCIe supports LTE B25, and Qorvo Phase 6 PAMiD QM77031 in the module does not actually support LTE B25. Qorvo has confirmed that the SAW integrated in the PA can support LTE B2, but B25 can work at the same frequency as B2.
  • Page 42 LTE Standard Module Series EG25-G Mini PCIe Hardware Design LTE-FDD B4 (10 MHz) -97.7 dBm -98.2 dBm -99.7 dBm -96.3 dBm LTE-TDD B5 (10 MHz) -98 dBm -98.5 dBm -99.9 dBm -94.3 dBm LTE-TDD B7 (10 MHz) -97.3 dBm -97.3 dBm -99.1 dBm...

  • Page 43: Esd Characteristics

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design 6.5. ESD Characteristics The following table shows the ESD characteristics of EG25-G Mini PCIe. Table 23: ESD Characteristics of EG25-G Mini PCIe Tested Interfaces Contact Discharge Air Discharge Unit Power Supply and GND...
  • Page 44 LTE Standard Module Series EG25-G Mini PCIe Hardware Design WCDMA @ PF = 128 (USB disconnected) WCDMA @ PF = 256 (USB disconnected) WCDMA @ PF = 512 (USB disconnected) LTE-FDD @ PF = 32 (USB disconnected) LTE-FDD @ PF = 64 (USB disconnected)
  • Page 45 LTE Standard Module Series EG25-G Mini PCIe Hardware Design GSM850 4UL/1DL @ 27.6 dBm EGSM900 1UL/4DL @ 32.2 dBm 344.4 EGSM900 2UL/3DL @ 31.2 dBm 560.4 EGSM900 3UL/2DL @ 29.2 dBm 649.4 EGSM900 4UL/1DL @ 27.9 dBm 741.2 DCS1800 1UL/4DL @ 29.2 dBm 205.2...
  • Page 46 LTE Standard Module Series EG25-G Mini PCIe Hardware Design PCS1900 1UL/4DL @ 25.4 dBm PCS1900 2UL/3DL @ 24.6 dBm PCS1900 3UL/2DL @ 23.3 dBm PCS1900 4UL/1DL @ 22.0 dBm WCDMA B1 HSDPA @ 22.5 dBm 735.9 WCDMA B2 HSDPA @ 22.6 dBm 740.6...
  • Page 47 LTE Standard Module Series EG25-G Mini PCIe Hardware Design LTE-FDD B12 @ 23.1 dBm 811.4 LTE-FDD B13 @ 23.7 dBm 910.7 LTE-FDD B18 @ 23.5 dBm 1038.5 LTE-FDD B19 @ 23.5 dBm 938.8 LTE-FDD B20 @ 23.3 dBm 1014 LTE-FDD B25 @ 22.7 dBm 1001.3...

  • Page 48: Thermal Consideration

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Table 25: GNSS Current Consumption of EG25-G Mini PCIe Parameter Description Conditions Typ. Unit Cold start @ Passive Antenna Searching (AT+CFUN=0) VBAT Lost state @ Passive Antenna (GNSS) Tracking Instrument Environment (AT+CFUN=0) 6.7.
  • Page 49 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Thermal Pad Thermal Pad EG25-G Mini PCIe Heatsink Heatsink EG25-G Module Shielding Cover Thermal Pad PCI Express Mini Card Connector Application Board Application Board Figure 18: Reference Heatsink Design NOTES The module offers the best performance when the internal BB chip stays below 105 ° C. When the maximum temperature of the BB chip reaches or exceeds 105 °...

  • Page 50: Dimensions And Packaging

    Dimensions and Packaging 7.1. General Description This chapter mainly describes mechanical dimensions as well as packaging specification of EG25-G Mini PCIe module. All dimensions are measured in millimeter (mm), and the dimensional tolerances are ± 0.05 mm unless otherwise specified.

  • Page 51: Standard Dimensions Of Mini Pci Express

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design 7.3. Standard Dimensions of Mini PCI Express The following figure shows the standard dimensions of Mini PCI Express. Please refer to document [1] for Detail A and Detail B. Figure 20: Standard Dimensions of Mini PCI Express...

  • Page 52: Packaging Specifications

    Figure 21: Dimensions of the Mini PCI Express Connector (Molex 679105700) 7.4. Packaging Specifications EG25-G Mini PCIe modules are packaged in a tray. Each tray contains 10 of modules. The smallest package of EG25-G Mini PCIe contains 100 modules. EG25-G_Mini_PCIe_Hardware_Design...

  • Page 53: Appendix A References

    LTE Standard Module Series EG25-G Mini PCIe Hardware Design Appendix A References Table 26: Related Documents Document Name Remark PCI Express Mini Card Electromechanical PCI Express Mini Card Specification Revision 1.2 Electromechanical Specification AT commands manual for EC21 series, Quectel_LTE_Standard_AT_Commands_...
  • Page 54 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Enhanced Full Rate Electro Magnetic Interference Electrostatic Discharge Equivalent Series Resistance Frequency Division Duplexing Full Rate GLObalnaya Navigatsionnaya Sputnikovaya Sistema, the Russian Global GLONASS Navigation Satellite System GMSK Gaussian Minimum Shift Keying...
  • Page 55 LTE Standard Module Series EG25-G Mini PCIe Hardware Design Pulse Code Modulation Personal Digital Assistant Protocol Data Unit Point of Sale Point-to-Point Protocol Radio Frequency Ready To Send Receive SIMO Single Input Multiple Output Short Message Service Transmitting Direction Transient Voltage Suppressor UART Universal Asynchronous Receiver &...

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