MICRF219A Datasheet, PDF (1/23 Pages) Micrel Semiconductor – ASK/OOK Receiver

MICRF219A
300MHz to 450MHz ASK/OOK Receiver with
Auto-Poll, RSSI, and Squelch
General Description
The MICRF219A 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 MICRF219A is ideal for low-cost, low-power, RKE,
TPMS, and remote actuation applications.
The MICRF219A 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 3.0V to 3.6V, 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
• 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
• 3.0V to 3.6V supply voltage range
• 4.3mA supply current at 315MHz
• 6.0mA supply current at 434MHz
• 13μA supply current in sleep mode
• 0.1μA supply current in shutdown mode
• 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
MICRF219AAYQS –40°C to +105°C
Package
16-Pin QSOP
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Typical Application
MICRF219A Typical Application Circuit (433.92MHz, 1kbps)
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
July 2011
M9999-071811-A
[e-mail] or [phone]