TH71221

·Single chip solution with only a few external components
·Stand-alone fixed-frequency user mode
·Programmable multi-channel user mode
·Low current consumption in active mode and very low standby current
·PLL-stabilized RF VCO (LO) with internal varactor diode
·Lock detect output in programmable user mode
·On-chip AFC for extended input frequency acceptance range
·3wire bus serial control interface
·FSK/ASK mode selection
·FSK for digital data or FM for analog signal reception
·RSSI output for signal strength indication and ASK reception
·Peak detector for ASK detection
·Switchable LNA gain for improved dynamic range
·Automatic PA turn-on after PLL lock
·ASK modulation achieved by PA on/off keying
·32-pin Quad Flat Lead Package (QFN)

The TH71221 is a single chip FSK/FM/ASK transceiver IC. TH71221 is designed to operate in low-power multichannel programmable or single-channel stand-alone, half-duplex data transmission systems. TH71221 can be used for applications in automotive, industrial-scientific-medical (ISM), short range devices (SRD) or similar applications operating in the frequency range of 300 MHz to 930 MHz. In programmable user mode, the transceiver can operate down to 27 MHz by employing an external VCO varactor diode.