MICRF113 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – QwikRadio® ASK Transmitter

MICRF113
QwikRadio^® ASK Transmitter
General Description
The MICRF113 is a high performance, easy to use, single
chip ASK Transmitter IC for remote wireless applications in
the 300 to 450MHz frequency band. This transmitter IC is
a true “data-in, antenna-out” monolithic device. MICRF113
has three strong attributes: power delivery, operating
voltage and operating temperature. In terms of power, the
MICRF113 is capable of delivering +10 dBm into a 50Ω
load. This power level enables a small form factor
transmitter (lossy antenna) such as a key fob transmitter to
operate near the maximum limit of transmission
regulations. In terms of operating voltage, the MICRF113
operates from 1.8V to 3.6V. Many transmitter ICs in the
same frequency band stop operating below 2.0V. The
MICRF113 will work with most batteries to the end of their
useful limits. In terms of operating temperature, the
MICRF113 operates from -40°C to +85°C.
The MICRF113 is easy to use. It requires a reference
frequency (RF carrier frequency divided by 32 times)
generated from a crystal with a few additional external
parts to create a complete versatile transmitter.
The MICRF113 operates with ASK/OOK (Amplitude Shift
Keying/On-Off Keyed) UHF receiver types from wide-band
super-regenerative radios to narrow-band, high
performance super-heterodyne receivers. The
MICRF113’s maximum ASK data rate is 10kbps
(Manchester Encoding).
The MICRF113 transmitter solution is ideal for industrial
and consumer applications where simplicity and form
factor are important.
Features
• Complete UHF transmitter
• Frequency range 300MHz to 450MHz
• Data rates up to 10kbps ASK
• Output Power to 10dBm
• Low external part count
• Low voltage operation (down to 1.8V)
• Operate with crystals or ceramic resonators
Applications
• Fan Controllers
• Remote Power Switches
• Multi-Media Remote Control
• Remote Sensor Data Links
• Infrared Transmitter Replacement
Ordering Information
Part Number
MICRF113YM6
Temp. Range
–40°C to +85°C
Package
SOT23-6
Typical Application
L3
PCB ¹
ANTENNA
3
2
L2
82nH
(150nH)
L1
680nH
(470nH)
C3
10pF
50V
C2
4.7pF
(6.8pF)
Vdd
C1
6.3V
MICRF113
1
6
PAOUT ASK
2
VSS
5
XTLIN
Vdd
3
4
Vdd XTLOUT
DATA
Y1 13.560MHz
(9.84375 MHz)
C4
18pF
C5
18pF
Figure 1. MICRF113 ASK Key Fob Design for 315 MHz and 433.92 MHz
QwikRadio is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 2008
M9999-060208
[phone]