MICRF229

MICRF229 400MHz to 450MHz ASK/OOK Receiver with Auto-Poll and RSSI General Description The MICRF229 is a 400MHz to 450MHz superheterodyne, image-reject, RF receiver with automatic gain control, ASK/OOK demodulator, and analog RSSI output. It only requires a crystal and a minimum number of external components to implement. The MICRF229 is ideal for low-cost, low-power, RKE, TPMS, and remote actuation applications. The MICRF229 achieves 112dBm sensitivity at a bit rate of 1kbps with 1% BER. Eight demodulator filter bandwidths are selectable in binary steps from 1625Hz to 34kHz at 433.92MHz, allowing the device to support bit rates up to 20kbps. The device operates from a supply voltage of 3.5V to 5.5V, and typically consumes 6.0mA at 433.92MHz. The MICRF229 has a shutdown mode and sleep mode that reduce current to 0.5μA and 15μA respectively. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Features  112dBm sensitivity at 1kbps with 1% BER  Auto-polling mode with bit checking  Supports bit rates up to 20kbps at 433.92MHz  25dB image-reject mixer  No IF filter required  60dB analog RSSI output range  3.5V to 5.5V supply voltage range  6.0mA supply current at 434MHz  15μA supply current in sleep mode  0.5μA supply current in shutdown mode  16-pin 4.9mm × 6.0mm QSOP package  40C to +105C temperature range  2kV HBM ESD rating Applications  Automotive remote keyless entry (RKE)  Long-range RF ID  Remote fan/light cont...