TMS3705AG4 Datasheet PDF - TI

●DESCRIPTION

●The transponder base station IC is used to drive the antenna of a TI-RFid™ transponder system, to send data modulated on the antenna signal, and to detect and demodulate the response of the transponder. The response of the transponder is a FSK signal (frequency shift keyed). The high or low bits are coded in two different high-frequency signals (134.2 kHz for low bits and 123 kHz for high bits, nominal). The transponder induces these signals in the antenna coil according an internally stored code. The energy the transponder needs to send out the data is stored in a charge capacitor in the transponder. The antenna field charges this capacitor in a preceding charge phase. The IC has an interface to an external microcontroller.

●FEATURES

●• Base Station IC for TI-RFid™ RF Identification • Short-Circuit Protection Systems

●• Diagnosis

●• Drives Antenna

●• Sleep-Mode Supply Current: 0.2 mA

●• Sends Modulated Data to Antenna

●• Designed for Automotive Requirements

●• Detects and Demodulates Transponder

●• 16-Pin SOIC (D) Package Response (FSK)