TH72012 Product Information DownloadLink 5031

Automotive ICs
TH72012
433MHz ASK Transmitter
Hall ICs
Intelligent Drivers
and Actuators
The TH72012 ASK transmitter IC is designed for applications in the European 433 MHz industrial-scientificmedical (ISM) band, according to the EN 300 220 telecommunications standard; but it can also be used in
other countries with similar standards, e.g. FCC part
15.231.
The transmitter's carrier frequency fc is determined by
the frequency of the reference crystal fref. The integrated
PLL synthesizer ensures that each RF value, ranging from
380 MHz to 450 MHz, can be achieved. This is done by
using a crystal with a reference frequency according to:
fref = fc/N, where N = 32 is the PLL feedback divider ratio.
RF&RFID
Features
•
•
•
•
•
•
•
Very low standby current
On-chip low voltage detector
High over-all frequency accuracy
Adjustable output power range from -12 dBm to +10 dBm
Adjustable current consumption from 3.4 mA to 10.6 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC8)
CMOS Imaging
Fully integrated PLL-stabilized VCO
Frequency range from 380 MHz to 450 MHz
Single-ended RF output
ASK achieved by on/off keying of internal power amplifier up to 40 kbit/s
Wide power supply range from 1.95 V to 5.5 V
Wide operating temperature range from –40° C to 125° C
Silicon MEMS
•
•
•
•
•
•
Bus ICs
IR Temperature
Automotive ICs
Block Diagram with external Components
RPS
VCC
ENTX
Hall ICs
ROI
mode
control
32
3
XBUF
Intelligent Drivers
and Actuators
PA
7
OUT
antenna
matching
network
VCO
CP
low
voltage
detector
2
CX1
RF&RFID
1
PFD
XOSC
n.c.
5
PLL
4
XTAL
ASKDTA
PSEL
6
8
VEE
Applications
•
•
•
•
General digital data transmission
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry systems
•
•
•
•
Home and building automation
Alarm and security systems
Garage door openers
Remote controls
Silicon MEMS
Application Circuit
PCB loop antenna
CM1
CMOS Imaging
LM2
LM1
CM2
VCC
Bus ICs
VCC
PSEL
ROI
ENTX
5
OUT
6
n.c.
7
FSKDTA
8
VEE
CB1
1
2
3
4
RPS
XTAL
ASK data
CX1
Email Europe and rest of the world:
[email protected]
Email USA :
[email protected]
For additional information go to our website at:
Email Asia:
[email protected]
Feb 2007
IR Temperature
Disclaimer:
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by
description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Melexis reserves the right to change specifications and
prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for current information. This product is intended for use
in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical lifesupport or life-sustaining equipment are specifically not recommended without additional processing by Melexis for each application. The information furnished by Melexis is believed to be
correct and accurate. However, Melexis shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss
of use, interrupt of business or indirect, special incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical
data herein. No obligation or liability to recipient or any third party shall arise or flow out of Melexis’ rendering of technical or other services.
© 2006 Melexis NV. All rights reserved.