CS53L21-CNZR

ADCs/DACs - Special Purpose Overview

The CS53L21-CNZR is a low-power, stereo analog-to-digital converter (ADC) from Cirrus Logic. It features 24-bit resolution and supports sample rates from 4 kHz to 96 kHz using a multibit delta-sigma architecture. The device achieves a dynamic range of 98 dB (A-weighted) with –88 dB THD+N. It integrates dual microphone preamplifiers (+16 dB or +32 dB), an analog programmable gain amplifier (PGA), and a digital signal processing engine for volume control and automatic level control (ALC). Power consumption is 8.72 mW at 1.8 V for stereo recording. It operates on variable supplies: 1.8–2.5 V for analog/digital cores and 1.8–3.3 V for the interface logic.

ADCs/DACs - Special Purpose Feature Summary

• 24-bit, 96-kHz stereo ADC with 98-dB dynamic range
• Integrated mic preamps (+16/+32 dB), PGA, and ALC
• Low power operation: 8.72 mW @ 1.8 V
• Supports I²C and SPI software modes plus 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 the CNZR suffix indicates the commercial grade (-10°C to +70°C) QFN package. Confirm RoHS compliance status as older documentation may vary. Check for end-of-life notifications or alternative part numbers if long-term supply is required.

ADCs/DACs - Special Purpose Selection Notes

Select this component for portable applications requiring low power and integrated microphone biasing. Ensure the system voltage matches the 1.8–2.5 V core requirement. Verify that the serial interface format (I²S/Left-Justified) and clocking mode (Master/Slave) align with the host processor.

ADCs/DACs - Special Purpose Part Context

The CS53L21 is part of Cirrus Logic's low-power audio ADC family. It is designed for high-performance audio conversion in space-constrained devices. The CDB53L21 evaluation board is available for development support.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.