TH72001_12 Datasheet, PDF (1/20 Pages) Melexis Microelectronic Systems – FSK Transmitter

Features
Fully integrated PLL-stabilized LC VCO
Frequency range of 290MHz to 350MHz
Single-ended RF output
FSK through crystal pulling allows modulation
from DC to 40 kbit/s
High FSK deviation possible for wideband data
transmission
Wide power supply range from 2.1 V to 5.5 V
Very low standby current
On-chip low voltage detector
TH72001
315MHz
FSK Transmitter
High over-all frequency accuracy
FSK deviation and center frequency
independently adjustable
Adjustable output power range from
-12 dBm to +11 dBm
Adjustable current consumption from
3.2 mA to 10.3 mA
Conforms to EN 300 220 and similar standards
8-pin Small Outline Integrated Circuit (SOIC)
Ordering Code
Product Code Temperature Code
TH72001
K
TH72001
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:
TH72001KDC-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
FSKDTA 1
FSKSW ²
ROI ³
ENTX 4
TH72001
8 VEE
7 OUT
6 VCC
5 PSEL
General Description
The TH72001 FSK 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 at
290 to 350MHz.
The transmitter's carrier frequency f_c is determined by the frequency of the reference crystal f_ref. The
integrated PLL synthesizer ensures that the radio frequency (RF) 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.
3901072001
Rev. 010
Page 1 of 20
Data Sheet
Jun/12