TH72002
315MHz
ASK Transmitter
Features
ꢀ Fully integrated PLL-stabilized VCO
ꢀ Frequency range from 290 MHz to 350 MHz
ꢀ Single-ended RF output
ꢀ High over-all frequency accuracy
ꢀ Adjustable output power range from
-12 dBm to +11 dBm
ꢀ ASK achieved by on/off keying of internal
power amplifier up to 40 kbit/s
ꢀ Adjustable current consumption from
3.2 mA to 10.3 mA
ꢀ Wide power supply range from 1.95 V to 5.5 V
ꢀ Very low standby current
ꢀ Conforms to EN 300 220 and similar standards
ꢀ 8-pin Small Outline Integrated Circuit (SOIC)
ꢀ On-chip low voltage detector
Ordering Code
Product Code Temperature Code
Package Code
Option Code
BAA-000
BAA-000
Packing Form Code
TH72002
TH72002
K
K
DC
DC
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:
TH72002KDC-BAA-000-RE
Application Examples
Pin Description
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
General digital data transmission
Tire Pressure Monitoring System (TPMS)
Remote Keyless Entry (RKE)
Low-power telemetry
1
2
3
4
8
7
6
5
VEE
ASKDTA
n. c.
OUT
VCC
PSEL
TH72002
ROI
Alarm and security systems
Garage door openers
ENTX
Home automation
General Description
The TH72002 ASK transmitter IC is designed for applications in the 315 MHz industrial-scientific-medical
(ISM) band. It can also be used for any other system with carrier frequencies ranging
from 290 MHz to 350 MHz.
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 290 MHz to 350 MHz, can be achieved
by using a crystal with a reference frequency according to: fref = fc/N, where N = 32 is the PLL feedback
divider ratio.
3901072002
Rev. 010
Page 1 of 20
Data Sheet
Jun/12