The HITAG Reader Chip HTRC110 is intended for use with transponders, which are based on NXP Semiconductors based HITAG transponder ICs.
In addition the IC supports other 125 kHz transponder types using amplitude modulation for the write operation and AM/PM for the read operation.
The receiver parameters (gain
actors, filter cutoff frequencies) can be optimized to system and transponder requirements.
The HTRC110 is designed for easy integration into RF-identification readers. State-of-the-art technology allows almost complete integration of the necessary building blocks.
A powerful antenna
driver/modulator together with a low-noise adaptive sampling time demodulator, programmable filters/amplifier and digitizer build the complete transceiver unit, required to design high-performance readers. A three-pin microcontroller interface is employed for programming the HTRC110 as well as for the bidirectional communication with the transponders. The three-wire interface can be changed into a two-wire interface by connecting the data input and the data output.
Tolerance dependent zero amplitude modulation caused severe problems in envelope detector systems, resulting in the need of very low tolerance reader antennas. These problems are solved by the Adaptive Sampling Time technique (AST).
Power supply ,The HTRC110 works with an external 5 V± 10 % power supply at VDD. The maximum DC-current is 10 mA+Îant*2/ π = 137 mA. For optimum performance, the power supply connection should be by-passed to ground with a 100 nF capacitor close to the IC.