MICRF219A

300MHz to 450MHz ASK/OOK Receiver with

Auto-Poll, and RSSI

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

August 12, 2015

Revision 3.0

RadioTech@micrel.com or (408) 944-0800

General Description

The

MICRF219A

is

a

300MHz 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 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 0.1

μA typical.

Datasheets and support documentation can be found on

Micrel’s website 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

• 13

μA supply current in sleep mode

• 0.1

μA 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

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Typical Application

MICRF219A Typical Application Circuit (433.92MHz, 1kbps)