TH72035

868/915MHz

FSK/ASK Transmitter

39010 72035

Page 1 of 20

Data Sheet

Rev. 011

Jan/12

Features

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

Very low standby current

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

5.1 mA to 13.4 mA

Conforms to EN 300 220 and similar standards

10-pin quad flat no lead (QFN) package

Ordering Code

Product Code

Temperature Code

Package Code

Option Code

Packing Form Code

TH72035

K

LD

BAA-000

TU

TH72035

K

LD

BAA-000

RE

Legend:

Temperature Code:

K for Temperature Range -40°C to 125°C

Package Code:

LD for QFN double

Packing Form:

RE for Reel, TU for Tube

Ordering example:

TH72035KLD-BAA-000-TU

Application Examples

Tire Pressure Monitoring System (TPMS)

Remote Keyless Entry (RKE)

Automatic Meter Reading (AMR)

Alarm and security systems

Garage door openers

Home and building automation

Low-power telemetry

Wireless access control

Pin Description

top view

O UT

VEE

VCC

V EE

PSEL

ENTX

FSKDTA

FSKSW

ROI

ASKDTA

General Description

The TH72035 FSK/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 902 to 928 MHz ISM band).

grated PLL synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved.

feedback divider ratio.