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Not recommended for new designs. The MLX71122 is a multi-channel RF receiver integrated circuit (IC) based on a double-conversion superheterodyne 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 433 and 868 MHz or for the use in North America or Asia at 315, 447 or 915 MHz.

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Top 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 shutdown and operating currents

  • AFC - automatic frequency correction

  • AGC - automatic gain control

  • 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)
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Evaluation board for MLX71122 (TPMS/RKE Receiver) - EVB71122

Features and benefits

  • 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 shutdown and operating currents

  • AFC - automatic frequency correction

  • AGC - automatic gain control

  • 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)

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