[Melexis]

General Description

The TH7120 is a single chip FSK/FM/ASK transceiver IC. It is designed to operate in low-power multi-channel programmable or single-channel stand-alone, half-duplex data transmission systems. It can be used for ISM, SRD or any other application operating in the frequency ranging of 300 MHz to 930 MHz.

Features

❐ Single chip solution with only a few external components

❐ Stand-alone fixed-frequency transceiver operation modes

❐ Programmable multi-channel transceiver operation modes

❐ Low current consumption in active mode and very low standby current

❐ PLL-stabilized RF VCO (LO) with internal varactor diode

❐ Lock detection in programmable channel applications

❐ 3wire bus serial control interface

❐ FSK/ASK modulation selection

❐ FSK for digital data and FM for analog signal reception

❐ RSSI allows signal strength indication and ASK detection

❐ Switchable LNA gain for improved dynamic range

❐ Automatic PA turn-on after PLL lock

❐ FM possible with external varactor

❐ ASK modulation achieved by on/off keying

❐ AFC option for extended input frequency acceptance range

❐ Surface mount package LQFP32

Application Examples

❐ General bi-directional half duplex digital data transmission or analog signal transmission

❐ Low-power telemetry

❐ Alarm and security systems

❐ Keyless car and central locking

❐ Domotics

❐ Model control