CS42L51-DNZ

Codecs Overview

The CS42L51-DNZ is a low-power, stereo CODEC with an integrated headphone amplifier. It features 24-bit converters supporting sample rates from 4 kHz to 96 kHz using a multibit delta-sigma architecture. The device operates on variable power supplies: 1.8 V to 2.5 V for digital and analog cores, and 1.8 V to 3.3 V for interface logic. Stereo playback consumes 12.93 mW at 1.8 V, while simultaneous record and playback consume 20.18 mW at 1.8 V. The DAC provides a 98-dB dynamic range (A-weighted) and -86-dB THD+N. The ADC offers a 98-dB dynamic range (A-weighted) and -88-dB THD+N. The unit is housed in a 32-pin QFN package and is rated for the Automotive temperature grade of -40°C to +85°C.

Codecs Feature Summary

• Integrated ground-centered headphone amplifier utilizing an on-chip charge pump to eliminate external DC-blocking capacitors.
• Digital signal processing engine providing bass and treble tone control, de-emphasis, PCM plus ADC mixing, and a beep generator.
• Programmable automatic level control (ALC) with noise gate functionality for input signal monitoring and volume adjustment.
• Flexible clocking options including master or slave operation, high-impedance digital output, and quarter-speed mode.

Codecs Applications

• HDD and flash-based portable audio players
• MD players and recorders
• PDAs and personal media players
• Portable game consoles
• Smart phones

Codecs Procurement Notes

Verify the specific suffix DNZ confirms the Automotive operating temperature range (-40°C to +85°C). Confirm the package type matches the required 32-pin QFN footprint. Ensure the design supports the specified voltage rails: 1.8 V to 2.5 V for core supplies and 1.8 V to 3.3 V for interface logic. Validate that the system controller can support either I²C or SPI software modes for register configuration.

Codecs Selection Notes

Select this component when automotive-grade reliability and extended temperature operation are required for portable audio systems. The CS42L51-CNZ variant serves as the commercial alternative if the wider temperature range is unnecessary. Consider the integrated headphone amp and DSP features to reduce external component count. Verify compatibility with the host processor's serial audio interface formats, such as I²S or Left-Justified.

Codecs Part Context

The CS42L51 is part of Cirrus Logic's low-power stereo codec family designed for battery-operated devices. The DNZ suffix specifically denotes the Automotive grade version, distinguishing it from the Commercial grade CNZ variant. Both share identical electrical specifications but differ in their qualified operating temperature ranges. The device is intended for applications requiring high integration and minimal power consumption.

Codecs Replacement Considerations

CS42L51-CNZ is the direct functional equivalent in the Commercial temperature grade (-10°C to +70°C). No other cross-model substitutes are officially documented for this specific part number.