CX20524
Description
The CX20524 Mixed Signal Device (MSD) is a highly integrated device designed for use in multi-band Global System for Mobile munications (GSM) and General Packet Radio Service (GPRS) handsets.
Key Features
- Supports multi-slot GPRS up to Class 12
- Receive path PGA for AGC of received signal the Baseband Processor (BP) via the Rx serial interface. The
- GMSK Digital Modulator receive path features a programmable gain amplifier (PGA) for
- Digital-to-Analog Converters (DACs) for analog conversion of Automatic Gain Control (AGC) of the receive signal. the GMSK modulator output
- Transmit power ramping and power level control In the transmit path, bursts of digital data are input to the MSD
- Auxiliary 8-bit ADC for monitoring system signals The CX20524 generates an analog signal to control the
- 3 V/1.8 V SIM card interface handset Power Amplifier (PA) output level
- Temperature sensor The device voiceband Codec section provides an interface to a
- Low speed asynchronous serial port for power management headset or car kit. functions
- Low power operation MSD integrates all necessary Low Drop Out (LDO) voltage
Applications
- GSM handsets and modules (850/900/1800/1900 MHz)
