General Description
The TH71081 ASK transmitter IC is designed for applications in the European 868MHz 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 920 MHz (e.g. for applications in the US 915MHz ISM band).

Features
❐ Fully integrated, PLL-stabilized VCO
❐ Frequency range from 850 MHz to 920 MHz
❐ 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 -15 dBm to +1 dBm
❐ Adjustable current consumption from 6.2 mA to 12.5 mA
❐ Differential output well-suited for loop antenna
❐ Conforms to EN 300 220 and similar standards
❐ 8-pin Small Outline Integrated Circuit (SOIC)

Application Examples
❐ Keyless car and central locking
❐ Low-power telemetry
❐ Alarm and security systems
❐ General digital data transmission
❐ General analog audio signal transmission
❐ Local oscillator signal generation