PCB Design

N720 is a 4G full Netcom industrial-grade module based on Qualcomm platform, with an external dimension of 30mm*28mm*2.8mm. Industrial-grade high performance: ultra-wide operating temperature reaches -40°C to +85°C, electrostatic capacity reaches 8KV; supports 2G/3G/4G network standards of the three major domestic mobile/Unicom/Telecom operators, suitable for developing wireless meter reading Terminal, vehicle, handheld POS, industrial router and other IoT communication equipment. ARM Cortex-A7 processor, 1.3GHz main frequency, 256k BL2 cache, 28nm process supports multiple network standards: GSM/GPRS/EDGE&&CDMA20001x/1xAdvanced/1xEV-DOrA&&WCDMAR99toDC-HSPA+&&TD-SCDMA&&LTECat4 supports USB2.0/UIM/ADC/ UART/GNSS (optional)/SDIO/PCM/I2CN720 has multiple product versions, which can be used according to the needs of different regions and frequency bands, as shown in the following table: Module Version Region Category Band N720CAChinaCat4FDD-LTE:B1,B3,B5,B8TDD-LTE :B38,B39,B40,B41TD-SCDMA:B34,B39UMTS:B1,B8EV-DO:BC0CDMA1x:BC0GSM/GPRS/EDGE:900/1800MHzCBChina/IndiaCat4FDD-LTE:B1,B3,B5,B8TDD-LTE:B38,B39 ,B40,B41TD-SCDMA:B34,B39UMTS:B1,B8GSM/GPRS/EDGE:900/1800MHzCCChinaCat4FDD-LTE:B1,B3,B8,B28TDD-LTE:B38,B39,B40,B41TD-SCDMA:B34,B39UMTS:B1 ,B8GSM/GPRS/EDGE:900/1800MHzEAEuropeCat4FDD-LTE:B1,B3,B5,B7,B8,B20TDD-LTE: Standards that B40 products follow N720 modules follow the following standards: 1. 3GPP TS 07.07 "AT command set for GSM Mobile Equipment (ME)" 2. YD 1214-2006 "900/1800MHz TDMA Digital Cellular Mobile Communication Network General Packet Radio Service (GPRS) Equipment Technical Requirements: Mobile Station" 3. YD 1215-2006 "900/1800MHz TDMA Digital Cellular Mobile Communication Network General Packet Radio Service (GPRS) Equipment Test Method: Mobile Station" 4. YD 1032-2000 "900/1800MHz TDMA Digital Cellular Mobile Communication System Electromagnetic Compatibility Limits and Measurement Methods Part 1: Mobile Station and Its Auxiliary Equipment" 5 . YD/T 2220-2011 WCDMA/GSM (GPRS) dual-mode digital mobile communication terminal technical requirements and test methods (fourth stage) 2011 "Information Technology Equipment Safety Part 1: General Requirements" 8. GB/T22450.1-2008 900/1800MHz TDMA Digital Cellular Mobile Communication System Electromagnetic Compatibility Limits and Test Methods Part 1: Mobile Station and Its Ancillary Equipment 9. CNCA-O7C-031:2007 "Implementation Rules for Compulsory Certification of Telecommunications Equipment" 10. GSM/GPRS/EDGE 2G Communication Protocol 11. WCDMA R99, Rel9DC- HSDPA+(42Mbps) Communication Protocol 12. CDMA2000@1x,1xAdvanced ,1xEV-DOrA communication protocol 13. LTE Cat4 4G communication protocol Basic characteristic parameter description Processor ARMCortex-A7 processor frequency up to 1.3GHz 256kBL2 cache memory RAM: 128MB or 256MBROM: 256MB Frequency band see Table 1-1 Wireless rate GPRS: Max85.6Kbps(DL)/Max85.6Kbps(UL)CDMA:Max3. 1Mbps(DL)/Max1.8Mbps(UL)WCDMA:DC-HSPA+,Max42Mbps(DL)/Max5.76Mbps(UL)TD-SCDMA:Max4.2Mbps(DL)/Max2.2Mbps(UL)FDD-LTE:non -CAcat4,Max150Mbps(DL)/Max50Mbps(UL)TDD-LTE: non-CAcat4,Max130Mbps(DL)/Max35Mbps(UL) Power class GSM850:+33dBm(PowerClass4)EGSM900:+33dBm(PowerClass4)DCS1800:+30dBm( PowerClass1)PCS1900:+30dBm(PowerClass1)EDGE850MHz:+27dBm(PowerClassE2)EDGE900MHz:+27dBm(PowerClassE2)EDGE1800MHz:+26dBm(PowerClassE2)EDGE1900MHz:+26dBm(PowerClassE2)TD-SCDMA:+23dBm(PowerClass3)CDMA1X/EVDO: +23dBm(PowerClass3)UMTS:+23dBm(PowerClass3)LTE:+23dBm(PowerClas s3) Antenna interface characteristics 2G/3G/4G antenna, 4G diversity receiving antenna, GNSS antenna, 50Ω characteristic impedance Group 15bit ADC interface, voltage detection range: 0.1~1.7VSDIO1 group SDIO interface, used for WLANPCM1 group PCM interface I2C1 group I2C interface, only supports main mode