General Description
The IC is a very low power consumption single chip FSK/ASK Superheterodyne Receiver (SHR) for the frequency bands 810 to 870 MHz and 400 to 440 MHz that is pin compatible with the ASK Receiver TDA5200. The IC offers a high level of integration and needs only a few external components. The device contains a low noise amplifier (LNA), a double balanced mixer, a fully integrated VCO, a PLL synthesiser, a crystal oscillator, a limiter with RSSI generator, a PLL FSK demodulator, a data filter, a data comparator (slicer) and a peak detector. Additionally there is a power down feature to save battery life.

Features
■ Low supply current (typ. at 868MHz
   Is = 5.9mA in FSK mode,
   Is = 5.2mA in ASK mode)
■ Supply voltage range 5V ±10%
■ Power down mode with very low
   supply current (50nA typ)
■ FSK and ASK demodulation capability
■ Fully integrated VCO and PLL Synthesiser
■ ASK sensitivity < –107dBm
■ Selectable frequency ranges 810-870 MHz and 400-440 MHz
■ Limiter with RSSI generation, operating at 10.7MHz
■ Selectable reference frequency
■ 2nd order low pass data filter with external capacitors
■ Data slicer with self-adjusting threshold
■ FSK sensitivity <-100dBm

Application
■ Keyless Entry Systems
■ Remote Control Systems
■ Alarm Systems
■ Low Bitrate Communication Systems