CS43L21-CNZ

ADCs/DACs - Special Purpose Overview

The CS43L21-CNZ is a low-power, stereo digital-to-analog converter (DAC) from Cirrus Logic. It features a 24-bit multibit delta-sigma architecture with a dynamic range of 98 dB (A-weighted) and -86 dB THD+N. The device integrates a ground-centered headphone amplifier powered by an on-chip charge pump, eliminating the need for external DC-blocking capacitors. It supports sample rates from 4 kHz to 96 kHz and operates with analog/digital core supplies of 1.8 V to 2.5 V and interface logic of 1.8 V to 3.3 V. The component is housed in a 32-pin QFN package.

ADCs/DACs - Special Purpose Feature Summary

• Integrated ground-centered headphone amplifier with on-chip charge pump for negative supply generation
• Digital signal processing engine including bass/treble tone control, PCM mixer, and beep generator
• Supports I²C and SPI software modes or standalone hardware mode for control
• Flexible clocking options including master/slave operation and quarter-speed mode

ADCs/DACs - Special Purpose Applications

• Portable audio players
• Smart phones
• Wireless headsets
• Personal media players

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix CNZ indicates the Commercial grade variant (-10°C to +70°C). Confirm that the ordering information matches the DS723F1 datasheet revision. Ensure compatibility with the required 32-pin QFN footprint and thermal pad requirements during procurement planning.

ADCs/DACs - Special Purpose Selection Notes

Select this component for applications requiring low power consumption in portable systems. The integrated charge pump simplifies design by removing external DC-blocking capacitors. Consider the Automotive grade (-DNZ) if operating temperatures exceed the commercial range of -10°C to +70°C.

ADCs/DACs - Special Purpose Part Context

The CS43L21 is part of Cirrus Logic's low-power audio DAC family. It is designed for battery-operated devices where space and power efficiency are critical. The device combines high-performance audio conversion with extensive digital signal processing capabilities in a minimal package size.

ADCs/DACs - Special Purpose Replacement Considerations

The CS43L22 is a similar device offering additional speaker amplifier capabilities. Verify pinout and register compatibility when considering alternatives within the Cirrus Logic portfolio.