MICRF229 Datasheet, PDF (1/23 Pages) Micrel Semiconductor – 400MHz to 450MHz ASK/OOK Receiver with Auto-Poll and RSSI

MICRF229
400MHz to 450MHz ASK/OOK Receiver
with Auto-Poll and RSSI
General Description
The MICRF229 is a 400MHz to 450MHz super-
heterodyne, 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 control
 Garage door/gate openers
 Remote metering
 Low data rate unidirectional wireless data links
Typical Application
MICRF229 433.92MHz Typical Application Circuit
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 15, 2015
Revision 1.0