描述 Description

The CXA3003R is a baseband analog processing IC for dual-mode CDMA/FM cellular phone. The CXA3003R interfaces between the inter-frequency section and the digital processing circuitry of the telephone. The receive circuit functions primarily convert analog IF signals to the analog baseband frequency range and to convert the analog baseband signals into digital signals. Transmit circuits convert digital data into analog baseband signals which are then up-convert to the IF frequency range.

特性 Features

? Receive signal path includes:

? IF to baseband down conversion

? Built-in trim-free low-pass filter for CDMA and FM

? Built-in A/D convertor convert the RX base band signal to the digital signal

? Analog output Receive Signal Strength Indicator (RSSI) for CDMA

? Local Oscillator for I-Q mixer

? Transmit signal path includes:

? Built-in D/A convertor convert the digital I-Q data to the analog baseband signal

? Built-in trim-free low-pass filter for CDMA and FM

? Baseband to IF up-conversion

? Local Oscillator for I-Q mixer

? Built-in PLL for TX IF

? Built-in House keeping A/D convertor

? Low power consumption in all modes

? Single 3.3 V power supply

Applications

? dual-mode CDMA/FM cellular telephone