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TH7107

Melecis
Part Number TH7107
Manufacturer Melecis
Description FSK/FM/ASK Transmitter
Published Mar 3, 2007
Detailed Description www.DataSheet4U.com TH7107 315/433MHz FSK/FM/ASK Transmitter Features ! Fully integrated, PLL-stabilized VCO ! Flexible...
Datasheet PDF File TH7107 PDF File

TH7107
TH7107

Overview
www.
DataSheet4U.
com TH7107 315/433MHz FSK/FM/ASK Transmitter Features ! Fully integrated, PLL-stabilized VCO ! Flexible frequency range from 310 MHz to 450 MHz ! FSK through crystal pulling allows modulation from DC to 20 kbit/s ! High FSK deviation possible for wideband data transmission ! ASK achieved by on/off keying of internal power amplifier ! FM possible with external varactor ! Wide power supply range from 2.
2 V to 5.
5 V ! High over-all frequency accuracy ! Very low standby current ! Adjustable output power range from -12 dBm to +2 dBm ! Adjustable current consumption from 4.
8 mA to 11.
5 mA ! FSK deviation and center frequency independently adjustable ! Differential output well-suited for loop antenna ! External clock available for µC drive, down to 1.
9 V supply ! ”Clock only” mode ! Conforms to EN 300 220 and similar standard Ordering Information Part No.
TH7107 Temperature Range -40 C° to 85 °C Package SOIC16 Application Examples ! ! ! ! ! Keyless car and central locking Low-power telemetry Alarm and security systems General digital data transmission General analog audio signal transmission Pin Description LF1 1 SUB 2 DATA 3 RO2 4 RO1 5 ENTX 6 ENCK 7 CKOUT 8 TH7107 16 LF2 15 VCC 14 VEE 13 OUT1 12 OUT2 11 VEE 10 VCC 9 PS 3901007107 Rev.
005 Page 1 of 14 Data Sheet Dec.
2001 TH7107 315/433MHz FSK/FM/ASK Transmitter General Description The TH7107 FSK/ASK/FM transmitter IC is designed for applications in the European 433MHz 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 310 MHz to 450 MHz (e.
g.
for applications in the US 315MHz ISM band).
The transmitter's carrier frequency fc is determined by the frequency of the reference crystal fref that is used.
The integrated PLL synthesizer ensures that each RF value, ranging from 310 MHz to 450 MHz, can be achieved by using a crystal with reference frequency according to: fref = fc/...


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