CS53L21-DNZ

ADCs/DACs - Special Purpose Overview

The CS53L21-DNZ is a low-power, stereo analog-to-digital converter featuring 24-bit conversion and multibit delta-sigma architecture. It supports sample rates from 4 kHz to 96 kHz with a 98-dB dynamic range (A-weighted) and -88-dB THD+N. The device integrates dual microphone inputs with programmable gain preamps (+16 dB or +32 dB), an analog PGA, and a digital volume control. Power consumption is 8.72 mW for stereo record at 1.8 V. It operates on variable 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

• Stereo ADC with 98-dB dynamic range and -88-dB THD+N
• Integrated dual mic preamps (+16/+32 dB) and analog PGA
• Programmable ALC and noise gate for signal management
• Supports I²C and SPI control interfaces in Software 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 ordering suffix matches the required temperature grade. The CS53L21-DNZ specifies the Automotive grade (-40°C to +85°C). Ensure the package type corresponds to the QFN form factor described in the datasheet. Confirm supply voltage requirements align with the specified ranges for analog, digital, and interface rails before procurement.

ADCs/DACs - Special Purpose Selection Notes

Select the CS53L21-DNZ for applications requiring automotive-grade reliability and low power consumption. This variant is suitable for environments with wider temperature fluctuations compared to the Commercial grade. Designers must account for the 32-pin QFN package thermal characteristics and ensure proper decoupling for the separate VA, VD, and VL power domains.

ADCs/DACs - Special Purpose Part Context

The CS53L21 belongs to Cirrus Logic's low-power audio ADC family. The DNZ suffix specifically identifies the Automotive qualification version of the CS53L21. Other variants include the CNZ for commercial use. The device is designed to replace discrete microphone amplifier solutions by integrating the ADC, preamp, and signal processing engine into a single component.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.