The AD6121ARS is a low power receiver IF subsystem specifically designed for CDMA applications. It consists of high dynamic range IF amplifiers with voltage controlled gain, a divide-by-two quadrature generator, an I and Q demodulator, and a powerdown control input. An integral low dropout regulator allows operation from battery voltages from 2.9 V to 4.2 V.
Feature
ully Compliant with IS98A and PCS Specifications
CDMA, W-CDMA, AMPS, and TACS Operation
Linear IF Amplifier
5.9 dB Noise Figure
–47.5 dB to +47 dB Linear-in-dB Gain Control
Quadrature Demodulator
Demodulates IFs from 50 MHz to 350 MHz
Integral Low Dropout Regulator
200 mV Voltage Drop
Accepts 2.9 V to 4.2 V Input from Battery Low Power
10 mA at Midgain
<1 A Sleep Mode Operation
Companion Transmitter IF Chip Available
Applications
CDMA, W-CDMA, AMPS, and TACS Operation
QPSK Receivers
