CS53L21-DNZR

ADCs/DACs - Special Purpose Overview

The CS53L21-DNZR is a low-power, stereo analog-to-digital converter (ADC) from Cirrus Logic Inc., designed for portable audio applications. It features 24-bit resolution with a multibit delta-sigma architecture and supports sample rates from 4 kHz to 96 kHz. The device offers a 98-dB dynamic range (A-weighted) and -88-dB THD+N. Key internal components include programmable microphone preamplifiers (+16 dB or +32 dB), an analog PGA, digital volume control, and automatic level control (ALC). It operates on variable power supplies: 1.8–2.5 V for analog/digital cores and 1.8–3.3 V for the interface logic. The DNZ suffix denotes the Automotive grade, rated for temperatures between -40°C and +85°C.

ADCs/DACs - Special Purpose Feature Summary

• 24-bit stereo ADC with 98-dB dynamic range and -88-dB THD+N
• Integrated signal processing including mic preamps, PGA, ALC, and noise gate
• Flexible clocking with master/slave serial port options
• Dual control interfaces: I²C and SPI for software mode; standalone hardware mode

ADCs/DACs - Special Purpose Applications

• Portable audio players
• Digital voice recorders
• Voice recognition systems
• Audio/video capture cards

ADCs/DACs - Special Purpose Procurement Notes

Verify that the 'DNZ' suffix corresponds to the Automotive temperature grade (-40°C to +85°C) as specified in the ordering information. Confirm RoHS compliance status through official manufacturer documentation, as historical data indicates potential non-compliance for earlier revisions of this component family. Ensure supply chain sources provide valid traceability for automotive-grade parts.

ADCs/DACs - Special Purpose Selection Notes

Select the CS53L21-DNZR for designs requiring automotive reliability and low power consumption. Choose this part over the Commercial grade (CNZ) if the operating environment exceeds -10°C. Verify that the system power rails align with the specified ranges: 1.8–2.5 V for VA/VD and 1.8–3.3 V for VL. Consider the 32-pin QFN package constraints for thermal management and PCB layout.

ADCs/DACs - Special Purpose Part Context

The CS53L21 is part of Cirrus Logic's low-power audio ADC portfolio, targeting portable and professional audio markets. The CDB53L21 evaluation board is available for development support. The device integrates a Signal Processing Engine (SPE) for channel mixing and mute functions, reducing host processor load. It is often used in conjunction with Cirrus Logic DACs for complete audio solutions.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult Cirrus Logic for current product line replacements, noting that the CS53L21 series has been subject to End-of-Life notifications in related families.