General Description
The MLX71122 is a multi-channel RF receiver IC based on a double-conversion super-heterodyne architecture. It is designed to receive FSK and ASK modulated RF signals either in 8 predefined frequency channels or frequency programmable via a 3-wire serial programming interface (SPI).
The IC is designed for a variety of applications, for example in the European bands at 433MHz and 868MHz or for the use in North America or Asia, e.g. at 315MHz, 447MHz or 915MHz.

Features
❐ Programmable PLL synthesizer
❐ 8-channel preconfigured or fully programmable SPI mode
❐ Double super-heterodyne receiver architecture with 2nd mixer as image rejection mixer
❐ Reception of FSK, FM and ASK modulated signals
❐ Low shut-down and operating currents
❐ Build-in acceptance of input frequency variations
❐ On-chip IF filter
❐ Fully integrated FSK/FM demodulator
❐ RSSI for level indication and ASK detection
❐ 2nd order low-pass data filter
❐ Positive and negative peak detectors
❐ Data slicer (with averaging or peak-detector adaptive threshold)
❐ EVB programming software is available on Melexis web site

Application Examples
❐ General digital and analog RF receivers at 300 to 930MHz
❐ Tire pressure monitoring systems (TPMS)
❐ Remote keyless entry (RKE)
❐ Low power telemetry systems
❐ Alarm and security systems
❐ Active RFID tags
❐ Remote controls
❐ Garage door openers
❐ Home and building automation