SIM Technology SIM68V SIM68V Reference Design with Passive Antenna Reference design
Below you will find brief information for SIM68V Reference Design with Passive Antenna SIM68V. This reference design provides a guide for implementing a SIM68V module in a system with a passive antenna. It includes a circuit diagram with component values and descriptions. The design utilizes external LNA and SAW for optimal performance. It also includes a guide for designing the charging circuit for a rechargeable backup battery.
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5 6 4 1 2 3 D D SIM68V reference design with passive antenna for best performance (with external LNA and SAW) U101 19 R2 100R TXD 20 R3 100R RXD 21 R109 1K VGPS_3V3 1 23 (2.8V--4.3V) 2.3 24 NC5 NC4 SDA TXD1 SCL RXD1 TXD NC1 RXD EINT0 V_BACKUP TIMEMARK VCC SCS GND3 NC0 GND GND GND IN 1 6 RFOUT GND 1 5 SHDN GND 2 C 2 VCC_RF 9 3 VCC_RF OUT C101 8 7 C1 6 1uF 10nF R205 1K 5 4 D203 2 DTC143ZE VGPS_3V3 J102 4 VCC BIAS L101 5.6nH RFIN 3 1 1 TVS6 2 Q201 1 Optional LED-1 2 3 SMA_A RF B101 D201 4.7UF B 2 2 1 LED-1C104 TVS2 B 22 GND0 SCLK 4 10 GND 5 GND 4 GND 3 GND 2 18 MISO 11 1 17 RF_IN U102 2 TVS4 TVS3 16 MOSI ANT U103 BGU7005 R1 0R 5 15 GND1 3 14 GND2 SAFEA1G58KA0F00 12 1 C VCC_RF SIM68V Module TVS5 13 R207 1K Note: 1. SIM68V does not support charging function to the backup battery, if a rechargable backup battery used,customer should design the charge circuit. (Optional) 2.5pF(Optional) 2. The load-cap of TVS6 should be less than 5pF SIM Technology A DRAWN BY PROJECT A TITLE SIM68V REF design CHECKED BY SIZE VER SHEET 6 5 4 3 2 1
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Key Features
- Passive antenna
- External LNA and SAW
- Rechargeable battery support
- Circuit diagram and component descriptions
- Detailed design guide
Frequently Answers and Questions
Does the SIM68V reference design support charging the backup battery?
No, the SIM68V does not support charging the backup battery. Customers must design a charging circuit for a rechargeable backup battery if used.
What is the maximum load capacitance allowed for TVS6?
The load capacitance of TVS6 should be less than 2.5pF (Optional).
What is the purpose of external LNA and SAW in this design?
External LNA and SAW are used for optimal performance, improving signal reception and enhancing the overall functionality of the device.
Why is a passive antenna used in this design?
A passive antenna is often chosen for its simplicity and cost-effectiveness in certain applications.
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