Telecom Design provides 4 different chips to support SigFox communications. This post details the differences of each of them in term of functionnalities
All are modules are based on a EFM32 / Cortex M3 micro-controler with 128KB flash, 16KB RAM, ultra low power including a Silicon Labs transceiver. The chip is a EFM32G210F128
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TD1208 TD1207 TD1204 TD1205 EFM32 G210F128 G210F128 G210F128 Firmware Upgradable Y N Y N RF stage Si4461 Si4461 Si4461 Si4463 +14dB +14dB +14dB +20dB Includes Rf Antenna N N N Y GPS N N Y Y Includes GPS Antenna N/A N/A N Y Accelerometer N N Y Y Max Power Consumption 37mA 37mA 37mA 95mA + GPS +/-45mA +/-45mA Analog Input 1 1 1 N/A Analog Output 1 N/A 1 N/A Digital I/O 1-7 5-11 1-6 2 Serial TTL 1 1 1 1 I2C 1 N/A 1 N/A Unit price (about) 13€ 11€ 35€ 55€ Minimal Quantity 24 24 20 15
The GPS chip used by TD1204 module is a UBX G7020 from U-blox.