TH72032_12 Datasheet, PDF (1/20 Pages) Melexis Microelectronic Systems – ASK Transmitter

Features
Fully integrated PLL-stabilized VCO
Frequency range from 850 MHz to 930 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
Very low standby current
On-chip low voltage detector
TH72032
868/915MHz
ASK Transmitter
High over-all frequency accuracy
Adjustable output power range from
-12 dBm to +9.5 dBm
Adjustable current consumption from
5.1 mA to 13.4 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
Ordering Code
Product Code Temperature Code
TH72032
K
TH72032
K
Package Code
DC
DC
Option Code
BAA-000
BAA-000
Packing Form Code
TU
RE
Legend:
Temperature Code:
Package Code:
Packing Form:
K for Temperature Range -40°C to 125°C
DC for SOIC
RE for Reel, TU for Tube
Ordering example:
TH72032KDC-BAA-000-TU
Application Examples
General digital data transmission
Tire Pressure Monitoring System (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry
Alarm and security systems
Garage door openers
Home automation
Pin Description
ASKDTA 1
n. c. 2
ROI ³
ENTX 4
TH72032
8 VEE
7 OUT
6 VCC
5 PSEL
General Description
The TH72032 ASK transmitter IC is designed for applications in the European 868 MHz industrial-scientific-
medical (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 915 MHz ISM band).
The transmitter's carrier frequency f_c is determined by the frequency of the reference crystal f_ref. The
integrated PLL synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved
by using a crystal with a reference frequency according to: f_ref = f_c/N, where N = 32 is the PLL feedback
divider ratio.
3901072032
Rev. 011
Page 1 of 20
Data Sheet
Jun/12