TMS3705A1DRG4

Product Summary

The transponder base station IC TMS3705A1DRG4 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 TMS3705A1DRG4 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 of the transponder TMS3705A1DRG4 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 TMS3705A1DRG4 has an interface to an external microcontroller.

Parametrics

TMS3705A1DRG4 absolute maximum ratings: (1)VDD, Supply voltage range, VDD, VSS/VSSB, VDDA, VSSA: –0.3 V to 7 V; (2)VOSC, Voltage range, OSC1, OSC2: –0.3 V to (VDD + 0.3) V; (3)Vinout, Voltage range, SCIO, TXCT, F_SEL, D_TST: –0.3 V to (VDD + 0.3) V; (4)Iinout, Overload clamping current, SCIO, TXCT, F_SEL, D_TST: –5 mA to 5 mA; (5)VANT, Output voltage, ANT1, ANT2: –0.3 V to (VDD + 0.3) V; (6)IANT, Output peak current, ANT1, ANT2: –1.1 A to 1.1 A; (7)Vanalog, Voltage range, SENSE, SFB, A_TST: –0.3 V to (VDD + 0.3) V; (8)ISENSE, SENSE input current, SENSE, SFB, A_TST: –5 mA to 5 mA; (9)ISFB, Input current in case of overvoltage, SFB: –5 mA to 5 mA; (10)TA, Operating ambient temperature: –40℃ to 85℃; (11)Tstg, Storage temperature range: –55℃ to 150℃; (12)RθJA, Thermal resistance, junction to free air: 130℃/W; (13)PD, Total power dissipation at TA = 85℃: 0.5 W; (14)VESD, ESD protection (MIL STD 883): –2000 V to 2000 V.

Features

TMS3705A1DRG4 features: (1)Base Station IC for TI-RFid RF Identification Systems; (2)Short-Circuit Protection; (3)Diagnosis; (4)Drives Antenna ; (5)Sleep-Mode Supply Current: 0.2 mA; (6)Sends Modulated Data to Antenna; (7)Designed for Automotive Requirements; (8)Detects and Demodulates Transponder Response (FSK); (9)16-Pin SOIC (D) Package.

Diagrams