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 Receiver TDA5210. 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.

Summary of Features

• Low supply current (typ. at 868MHz I s = 5.9mA in FSK mode, I s = 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

Target Applications

• Keyless Entry Systems
• Remote Control Systems
• Alarm Systems
• Low Bitrate Communication Systems