EVB7122

Features:

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
FSK for digital data or FM for analog signal reception
FSK/ASK mode selection
RSSI output for signal strength indication and ASK reception
ASK detection normal or with peak detector
Switchable LNA gain for improved dynamic range
Automatic PA turn-on after PLL lock
ASK modulation achieved by PA on/off keying
3wire bus serial control interface
EVB comes with a cable to connect to a PC's LPT port
EVB programming software is available on Melexis web site


Application

General bi-directional half duplex digital data RF signaling or analog signal communication
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry systems
Alarm and security systems
Wireless access control
Garage door openers
Networking solutions
Active RFID tags
Remote controls
Home and building automation


Description

The TH7122 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multichannel programmable or single-channel stand-alone, half-duplex data transmission systems. It 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.