TH72036 Product Information DownloadLink 5037

Automotive ICs
TH72036
868/915MHz FSK/ASK Transmitter
Hall ICs
Intelligent Drivers
and Actuators
RF&RFID
The TH72036 FSK/ASK transmitter IC is designed for
applications in the European 868 MHz industrial-scientificmedical (ISM) band, according to the EN 300 220 telecommunications standard. It can also be used for any
other system with carrier frequencies ranging from 850
MHz to 930 MHz (e.g. for applications in the US 902 to
928 MHz ISM band).
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
850 MHz to 930 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.
A clock signal with selectable frequency is provided.
It can be used to drive a microcontroller.
Dedicated for
Tire Pressure Monitoring Systems
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Very low standby current
Microcontroller clock output
On-chip low voltage detector
High over-all frequency accuracy
FSK deviation and center frequency independently adjustable
Adjustable output power range from -11 dBm to +9.5 dBm
Adjustable current consumption from 5.5 mA to 13.8 mA
Conforms to EN 300 220 and similar standards
10-pin Quad Flat No-Lead (10L QFN 3x3 Dual)
Bus ICs
Fully integrated PLL-stabilized VCO
Frequency range from 850 MHz to 930 MHz
Single-ended RF output
FSK through crystal pulling allows modulation from DC to 40 kbit/s
High FSK deviation possible for wideband data transmission
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
CMOS Imaging
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Silicon MEMS
Features
IR Temperature
Block Diagram with external Components
Automotive ICs
RPS
CKDIV
7
CKOUT
Hall ICs
ROI
5
div 8
div 32
6
PFD
XOSC
XBUF
CP
antenna
matching
network
8 OUT
PA
low
voltage
detector
VCO
4
mode
control
FSKSW 2
EN
9
1
VEE
FSKDTA
Applications
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General digital data transmission
Tire Pressure Monitoring Systems (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry systems
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Home and building automation
Alarm and security systems
Garage door openers
Remote controls
Evaluation Board
CM1
CM2
LT
10
9
8
7
6
VEE
CKDIV
PSEL
RPS
CM3
OUT
LM
OUT
VCC
Intelligent Drivers
and Actuators
RF&RFID
10
32
3
XTAL
ASK data
PSEL
PLL
CX2
CX1
Silicon MEMS
VCC
R1
CMOS Imaging
CB1
FSKDTA
FSKSW
ROI
EN
CKOUT
VCC
1
2
3
4
5
R1
ASK data
CCK
Bus ICs
FSK data
XTAL
CX2
CX1
to drive
microcontroller
Application Circuit
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.