TH72035

868/915MHz

FSK/ASK Transmitter

39010 72035

Page 1 of 20

Data Sheet

Rev. 008

June/07

top

TH72035

OUT

VEE

VCC

VEE

PSEL

ENTX

FSKDTA

FSKSW

ROI

ASKDTA

bottom

2

1

3

4

5

9

10

8

7

6

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 Package (QFN)

Ordering Information

Part Number

Temperature Code

Package Code

Delivery Form

TH72035

K (-40 °C to 125 °C)

LD (10L QFN 3x3 Dual)

120 pc/tray

5000 pc/T&R

Application Examples

Pin Description

! General digital data transmission

! Tire Pressure Monitoring Systems (TPMS)

! Remote Keyless Entry (RKE)

! Wireless access control

! Alarm and security systems

! Garage door openers

! Remote Controls

! Home and building automation

! Low-power telemetry systems

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.