MICRF002_03 Datasheet, PDF (1/16 Pages) Micrel Semiconductor – 300-440MHz QwikRadio™ASK Receiver

MICRF002/RF022
Micrel
MICRF002/RF022
300-440MHz QwikRadio™ASK Receiver
Final Information
General Description
The MICRF002 is a single chip ASK/OOK (ON-OFF Keyed)
RF receiver IC. This device is a true “antenna-in to data-out”
monolithic device. All RF and IF tuning is accomplished
automatically within the IC which eliminates manual tuning
and reduces production costs. The result is a highly reliable
yet low cost solution.
The MICRF002 is a fully featured part in 16-pin packaging,
the MICRF022 is the same part packaged in 8-pin packaging
with a reduced feature set (see “Ordering Information” for
more information).
The MICRF002 is an enhanced version of the MICRF001
and MICRF011. The MICRF002 provides two additional
functions over the MICRF001/011, (1) a Shutdown pin, which
may be used to turn the device off for duty-cycled operation,
and (2) a “Wake-up” output, which provides an output flag
indicating when an RF signal is present. These features make
the MICRF002 ideal for low and ultra-low power applications,
such as RKE and remote controls.
All IF filtering and post-detection (demodulator) data filtering
is provided within the MICRF002, so no external filters are
necessary. One of four demodulator filter bandwidths may be
selected externally by the user.
The MICRF002 offer two modes of operation; fixed-mode
(FIX) and sweep-mode (SWP). In fixed mode the MICRF002
functions as a conventional superhet receiver. In sweep
mode the MICRF002 employs a patented sweeping function
to sweep a wider RF spectrum. Fixed-mode provides better
selectivity and sensitivity performance and sweep mode
enables the MICRF002 to be used with low cost, imprecise
transmitters.
QwikRadio™
Features
• 300MHz to 440MHz frequency range
• Data-rate up to 10kbps (fixed-mode)
• Low Power Consumption
• 2.2mA fully operational (315MHz)
• 0.9µA in shutdown
• 220µA in polled operation (10:1 duty-cycle)
• Wake-up output flag to enable decoders and micropro-
cessors
• Very low RF reradiation at the antenna
• Highly integrated with extremely low external part count
Applications
• Automotive Remote Keyless Entry (RKE)
• Remote controls
• Remote fan and light control
• Garage door and gate openers
Typical Application
1/4 Wave Monopole
12pF
68nH
+5V
12nH
0.047uF
MICRF002
SSEELL00
SWEN
VSSRF REFOSC
VSSRF
SEL1
ANT
VDDRF
VDDBB
CAGC
WAKEB
SHUT
4.7uF
CTH
DO
NC
VSSBB
4.8970MHz
Data
Output
315MHz 800bps On-Off Keyed Receiver
QwikRadio is a trademark of Micrel, Inc. The QwikRadio ICs were developed under a partnership agreement with AIT of Orlando, Florida.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
March 2003
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MICRF002/RF022