CS47028C-CQZ

Digital Signal Processor Dsp Overview

The CS47028C-CQZ is a high-performance audio system-on-a-chip (ASOC) processor from Cirrus Logic, featuring a 32-bit fixed-point DSP core. It integrates 4 channels of 24-bit ADC input and 8 channels of 24-bit DAC output, supporting sample rates up to 192 kHz. The device includes integrated S/PDIF Rx/Tx, three hardware sample rate converters (SRCs), and an analog multiplexer. Operating with a 1.8V core and 3.3V I/O supply, it delivers 105 dB dynamic range for ADC and 108 dB for DAC in differential mode. Packaged in a 100-pin LQFP with an exposed pad, it supports commercial temperature ranges from 0°C to +70°C.

Digital Signal Processor Dsp Feature Summary

• 32-bit DSP Core: Performs 300 million MAC/s with dual MAC cycles per clock and 72-bit accumulators.
• Integrated Audio Interface: Includes 4-channel ADC (105 dB DR) and 8-channel DAC (108 dB DR), plus S/PDIF Rx/Tx and TDM/I2S support.
• Sample Rate Conversion: Features three internal hardware SRC blocks for mixing different sample rates and dual-domain clock support.
• Memory Architecture: Contains 32K x 32-bit SRAM with configurable Y-data and program memory blocks.

Digital Signal Processor Dsp Applications

• Automotive head units and outboard amplifiers
• Digital TV and DVD receivers
• DSP-controlled speakers such as sound bars and subwoofers

Digital Signal Processor Dsp Procurement Notes

Verify the specific suffix 'CQZ' indicates the commercial temperature grade (0°C to +70°C). Confirm that the part number corresponds to the CS47028 variant with 4 ADC inputs and 8 DAC outputs. Check for current availability status as older Cirrus Logic audio processors may have discontinuation notices. Ensure compatibility with the required 1.8V core and 3.3V I/O power supplies during design validation.

Digital Signal Processor Dsp Selection Notes

Select the CS47028C-CQZ when four simultaneous analog inputs and eight analog outputs are required within a single chip. Choose this model over the CS47024 if more DAC channels are needed, or over the CS47048 if fewer ADC channels suffice. Ensure the application requires the commercial temperature range; use the DQZ suffix for automotive grades (-40°C to +85°C). Verify that the host controller can interface via SPI or I2C for configuration and boot.

Digital Signal Processor Dsp Part Context

The CS47028C-CQZ belongs to the Cirrus Logic CS470xx family of audio processors, derived from the CS48500 series. This family simplifies system design by integrating DSP, analog I/O, and digital interfaces into one package, reducing component count. The CS47028 specifically bridges the gap between the lower-channel CS47024 and the higher-input CS47048, offering a balanced solution for mid-to-high fidelity audio processing applications.

Digital Signal Processor Dsp Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided documentation. Designers should consult Cirrus Logic sales representatives for current product line updates or legacy replacements, as the CS470xx family has been succeeded by newer generations.