MICRF009 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – QwikRadio Low-Power UHF Receiver

MICRF009
QwikRadio® Low-Power UHF Receiver
General Description
The MICRF009 is a single chip, ASK/OOK (ON-OFF
Keyed) RF receiver IC. It provides the same function but
with performance enhancements over earlier QwikRadio^®
receivers. Two key improvements are: higher sensitivity
(typically 6dB higher than the MICRF002) and faster
recovery from shutdown (typically 1ms). Just like all other
members of the QwikRadio^® family, the MICRF009
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.
Ordering Information
Features
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QwikRadio®
• 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
Part Number
MICRF009BM
Demodulator Bandwidth
User Programmable
Operating Mode
Fixed or Sweep
Shutdown
Yes
Package
16-pin SOIC
Typical Application
315Mhz 1200Bps On-Off Keyed Receiver
Fixed Mode
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 [phone] • fax [phone] • http://www.micrel.com
January 18, 2005
M9999-011805
[phone]