CX20524 Datasheet | Skyworks Solutions

.. PRODUCT SUMMARY CX20524 Mixed Signal Device for GSM and GPRS Applications Applications - GSM handsets and modules (850/900/1800/1900 MHz) - GPRS handsets and modules (850/900/1800/1900 MHz) 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. The MSD includes all the power management, voice-band, mixed signal, and radio control functions required in a GSM/GPRS handset and module. Features - Supports multi-slot GPRS up to Class 12 - Σ∆ Analog-to-Digital Converters (ADCs) for digitization of In the receive path, the MSD digitizes the baseband Inbaseband receive signal Phase/Quadrature (I/Q) inputs. Digital samples are then sent to - 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 - Low noise voiceband ADC for direct interface to handset and over the control port. A Gaussian Minimum-Shift Keying headset microphone (GMSK) modulator generates modulated I and Q waveforms - Low noise voiceband DAC for direct interface to handset and from the input data. The I and Q waveforms are converted into headset speaker analog waveforms and output from 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 - High speed asynchronous serial ports for interface to 32 Ω handset speaker and...