TH72035

868/915MHz

FSK/ASK Transmitter

Page 1 of 21

REVISION 012 - JUNE 14, 2017

3901072035

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

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

Ordering information

Product Code

Temperature Code

Package Code

Option Code

Packing Form Code

TH72035

K

LD

BAA-000

RE

TH72035

K

LD

BAA-000

TU

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

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).

synthesizer ensures that each RF value, ranging from 850 MHz to 930 MHz, can be achieved. This is done by using a