MICRF002/RF022
300-440MHz QwikRadio® ASK Receiver
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.
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
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.
• 220µA in polled operation (10:1 duty-cycle)
• Wake-up output flag to enable decoders and
microprocessors
• Very low RF re-radiation at the antenna
• Highly integrated with extremely low external part count
Applications
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.
• Automotive remote keyless entry (RKE)
• Remote controls
• Remote fan and light control
• Garage door and gate openers
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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
_________________________________________________________________________________________________________
Ordering Information
Part Number
Demodulator
Bandwidth
Operating Mode
Shutdown
WAKEB
Output Flag
Package
Lead Finish
MICRF002YM
User Programmable
5000Hz
Fixed or Sweep
Sweep
Yes
No
Yes
Yes
No
16-Pin SOIC
8-Pin SOIC
8-Pin SOIC
8-Pin SOIC
8-Pin SOIC
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
MICRF022YM-SW48
MICRF022YM-FS12
MICRF022YM-FS24
MICRF022YM-FS48
1250Hz
Fixed
Yes
Yes
Yes
2500Hz
Fixed
No
5000Hz
Fixed
No
QwikRadio is a registered trademark of Micrel, Inc. The QwikRadio ICs were developed under a partnership agreement with AIT of Orlando, FL.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-070808
July 2008
MICREL [ MICREL SEMICONDUCTOR ]
