MICRF009

QwikRadio® Low-Power UHF Receiver

Power, Connect and Protect is a trademark of Micrel, Inc.

QwikRadio is a registered trademark of Micrel, Inc. The QwikRadio Ics were developed under a partnership agreement with AIT of Orlando, Florida.

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

January 18, 2005

M9999-011805

(408) 955-1690

General Description

The MICRF009 is a single chip, ASK/OOK (ON-OFF

Keyed) RF receiver IC. It provides the same function but

receivers. Two key improvements are: higher sensitivity

(typically 6dB higher than the MICRF002) and faster

recovery from shutdown (typically 1ms). Just like all other

achieves low power operation, a very high level of

integration, and it is particularly easy to use.

All post-detection (demodulator) data filtering is provided

on the MICRF009, so no external baseband filters are

required. One of two filter bandwidths may be selected

externally by the user. The user only needs to program the

appropriate filter selection based on the data rate and code

modulation format.

The MICRF009 offer two modes of operation; fixed-mode

(FIX) and sweep-mode (SWP). In fixed-mode the

MICRF009 functions as a conventional superheterodyne

receiver. In sweep-mode the MICRF009 employs a

patented sweeping function to sweep a wider RF spectrum.

Fixed-mode provides better selectivity and sensitivity

performance while sweep mode enables the MICRF009 to

be used with low-cost, imprecise transmitters.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

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QwikRadio®

Features

• High sensitivity (–104dBm)

• Fast recovery from shutdown (1ms)

• 300MHz to 440MHz frequency range

• Data-rate up to 2.0kbps (fixed-mode, Manchester encoding)

• Low power consumption

–

2.9mA fully operational (315MHz)

–

0.15µA in shutdown

–

290µA in polled mode (10:1 duty-cycle)

• Shutdown input

• Automatic tuning, no manual adjustment

• Very low RF re-radiation at the antenna

• Highly integrated with extremely low external part count

• 1ms time to good data

Applications

• Automotive remote keyless entry (RKE)

• Long range RF identification

• Remote fan and light control

• Garage door and gate openers

Ordering Information

Part Number

Demodulator Bandwidth

Operating Mode

Shutdown

Package

MICRF009BM

User Programmable

Fixed or Sweep

Yes

16-pin SOIC

Typical Application

315Mhz 1200Bps On-Off Keyed Receiver

Fixed Mode