ADF7012

Features:

Single-chip, low power UHF transmitter
75 MHz to 1 GHz frequency operation
Multichannel operation using Frac-N PLL
2.3 V to 3.6 V operation
On-board regulator-stable performance
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




Application

Low cost wireless data transfer
Security systems
RF remote controls
Wireless metering
Secure keyless entry




Pinout








Specifications

DV_DD to GND −0.3 V to +3.9 V
(GND = AGND = DGND = 0 V)
Digital I/O Voltage to GND −0.3 V to DV_DD + 0.3 V
Analog I/O Voltage to GND −0.3 V to DV_DD + 0.3 V
Operating Temperature Range
Maximum Junction Temperature 150°C
TSSOP _JA Thermal Impedance 150.4°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec)215°C
Infrared (15 sec) 220°C






Description

The ADF7012 is a low power FSK/GFSK/OOK/GOOK/ASKUHF transmitter designed for short range devices (SRDs). The output power, output channels, deviation frequency, and modulation 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.

There are five selectable modulation schemes of ADF7012: binary frequencyshift keying (FSK), Gaussian frequency shift keying (GFSK), binary on-off keying (OOK), Gaussian on-off keying (GOOK), and amplitude shift keying (ASK). In the compensation register, the output can be moved in <1 ppm steps so that indirect compensation for frequency error in the crystal reference can be made. A simple 3-wire interface controls the registers. In power-down, the part has a typical quiescent current of <0.1 A.