MICRF230 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – 400MHz to 450MHz ASK/OOK Receiver with RSSI and Squelch

MICRF230
400MHz to 450MHz ASK/OOK Receiver
with RSSI and Squelch
General Description
The MICRF230 is a 400MHz 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 MICRF230 is ideal for low-cost, low-power, RKE,
TPMS, and remote actuation applications.
The MICRF230 achieves −112dBm sensitivity at a bit rate
of 1kbps with 1% BER. Four demodulator filter bandwidths
are selectable using SEL0 and SEL1 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 3.5V to 5.5V and typically consumes 6.0mA at
433.92MHz. The MICRF230 has a shutdown mode that
reduces current to 0.5µA. The squelch feature decreases
the activity on the data output pin until valid bits are
detected while maintaining overall receiver sensitivity.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
• −112dBm sensitivity at 1kbps with 1% BER
• Supports bit rates up to 20kbps at 433.92MHz
• 25dB image-reject mixer
• No IF filter required
• 60dB analog RSSI output range
• 3.5V to 5.5V supply voltage range
• 6.0mA supply current at 434MHz
• 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 RFID
• Remote fan and light control
• Garage door and gate openers
• Remote metering
• Low data rate unidirectional wireless data links
Typical Application
MICRF230 Typical Application Circuit for 433.92MHz
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 15, 2015
Revision 2.0