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General Description    
The MICRF220 is a 300MHz to 450MHz super-heterodyne, image-reject, RF receiver with automatic gain control, ASK/OOK demodulator, analog RSSI output, and integrated squelch features. It only requires a crystal and a minimum number of external components to implement. The MICRF220 is ideal for low-cost, low-power, RKE, TPMS, and remote actuation applications.
The MICRF220 achieves-110dBm sensitivity at a bit rate of 1kbps with 0.1% BER. Four  demodulator filter bandwidths are selectable in binary steps from 1625Hz to 13kHz at 433.92MHz,allowing the device to support bit rates up to 20kbps. The device operates from a supply voltage of 3.2V to 5.5V, and typically consumes 4.3mA of supply current at 315MHz and  6.0mA at 433.92MHz. A shutdown mode reduces supply current to 0.1μA typical. The squelch feature decreases the activity on the data output pin until valid bits are detected while maintaining overall receiver sensitivity.
Data sheets and support documentation can be  found on Micrel’s web site at: www.micrel.com. 
Features
  • -110dBm sensitivity at 1kbps with 0.1% BER
  • Supports bit rates up to 20kbps at 433.92MHz
  • 25dB image-reject mixer
  • No IF filter required
  • 60dB analog RSSI output range
  • 3.2V to 5.5V supply voltage range
  • 4.3mA supply current at 315MHz
  • 6.0mA supply current at 434MHz
  • 0.1μA supply current in sleep mode
  • Data output squelch until valid bits detected
  • 16-pin QSOP package (4.9mm x 6.0mm)
  • 40C to +105C temperature range
  • 3kV HBM ESD Rating
 
Ordering Information
Part Number Temperature Range Package
MICRF220AYQS –40° to +105°C 16-Pin QSOP
 
Typical Application