TH72012_12 Datasheet, PDF (1/20 Pages) Melexis Microelectronic Systems – ASK Transmitter

Features
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
Very low standby current
On-chip low voltage detector
TH72012
433MHz
ASK Transmitter
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 (SOIC)
Ordering Code
Product Code Temperature Code
TH72012
K
TH72012
K
Package Code
DC
DC
Option Code
BAA-000
BAA-000
Packing Form Code
RE
TU
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:
TH72012KDC-BAA-000-RE
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
TH72012
8 VEE
7 OUT
6 VCC
5 PSEL
General Description
The TH72012 ASK transmitter IC is designed for applications in the European 433 MHz industrial-scientific-
medical (ISM) band, according to the EN 300 220 telecommunications standard; but it can also be used in
any other country with similar frequency bands.
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 380 MHz to 450 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.
3901072012
Rev. 012
Page 1 of 20
Data Sheet
Jun/12