General Description
●The IC is a very low power consumption single chip FSK/ASK Superhet erodyne Receiver (SHR) for the frequency band 300 to 340 MHz. 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 (Is = 6.4 mA typ. in FSK mode, Is = 5.6 mA typ. 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 better than -110 dBm over specified temperature range (- 40 to +105°C)
●■ Selectable frequency ranges 300-320 MHz and 300-340 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 better than -102 dBm over specified temperature range (- 40 to +105°C)
●Applications
●■ Keyless Entry Systems
●■ Remote Control Systems
●■ Alarm Systems
●■ Low Bitrate Communication Systems
