MICRF102_06 Datasheet, PDF (1/12 Pages) Micrel Semiconductor – QwikRadio™ UHF ASK Transmitter

MICRF102
Micrel
MICRF102
QwikRadio™ UHF ASK Transmitter
General Description
The MICRF102 is a single chip Transmitter IC for remote
wireless applications. The device employs Micrel’s latest Qwi-
kRadio™ technology. This device is a true “data-in, antenna-
out” monolithic device. All antenna tuning is accomplished
automatically within the IC which eliminates manual tuning,
and reduces production costs. The result is a highly reliable
yet extremely low cost solution for high volume wireless
applications. Because the MICRF102 is a true single-chip
radio transmitter, it is easy to apply, minimizing design and
production costs, and improving time to market.
The MICRF102 uses a novel architecture where the external
loop antenna is tuned to the internal output stage. This trans-
mitter is designed to comply with worldwide UHF unlicensed
band intentional radiator regulations. The IC is compatible with
virtually all ASK/OOK (Amplitude Shift Keying/On-Off Keyed)
UHF receiver types from wide-band super-regenerative radios
to narrow-band, high performance super-heterodyne receiv-
ers. The transmitter is designed to work with transmitter data
rates from 100 to 20k bits per second.
The automatic tuning, in conjunction with the external resistor,
ensures that the transmitter output power stays constant for
the life of the battery.
When used with Micrel’s family of QwikRadio™ receivers,
the MICRF102 provides the lowest cost and most reliable
remote actuator and RF link system available.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Ordering Information
Part Number
Standard
MICRF102BM
Pb-Free
MICRF102YM
Temperature
Range
-40°C to +85°C
Features
QwikRadio™
• Complete UHF transmitter on a monolithic chip
• Frequency range 300MHz to 470MHz
• Data rates to 20kbps
• Automatic antenna alignment, no manual adjustment
• Low external part count
• Low standby current <0.04µA
Applications
• Remote Keyless Entry systems (RKE)
• Remote fan/light control
• Garage door opener transmitters
• Remote sensor data links
• Tire Pressure Monitoring System (TPMS)
• Telemetry
Package
8-Pin SOIC
Typical Application
+5V
4.7µF
0.1µF
RP1
100k
RP2
6.8k
Y1
MICRF102
PC
VDD
ASK
ANTP
VSS
ANTN
REFOSC STBY
+5V
ASK DATA INPUT
C2
8.2pF 50V
(4.7pF 50V)
C3
12pF 50V
(2.7pF 50V)
PCB Antenna
L1
100k
QwikRadio is a 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 [phone] • fax + 1 [phone] • http://www.micrel.com
December 2006
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MICRF102