GENERAL DESCRIPTION

The ADF7012 is a low power FSK/GFSK/OOK/GOOK/ASK UHF transmitter designed for short-range devices (SRDs). The output power, output channels, deviation frequency, and mod ulation type are programmable by using four, 32-bit registers. The fractional-N PLL and VCO with external inductor enable the user to select any frequency in the 75 MHz to 1 GHz band. The fast lock times of the fractional-N PLL make the ADF7012 suitable in fast frequency hopping systems. The fine frequency

deviations available and PLL phase noise performance facilitates narrow-band operation.

FEATURES

Single-chip, low power UHF transmitter

75 MHz to 1 GHz frequency operation

Multichannel operation using fractional-N PLL

2.3 V to 3.6 V operation

On-board regulator

Programmable output power

   −16 dBm to +14 dBm, 0.4 dB steps

Data rates: dc to 179.2 kbps

Low current consumption

   868 MHz, 10 dBm, 21 mA

   433 MHz, 10 dBm, 17 mA

   315 MHz, 0 dBm, 10 mA

Programmable low battery voltage indicator

24-lead TSSOP