CS4349-DZZ

ADCs/DACs - Special Purpose Overview

The CS4349-DZZ is a stereo digital-to-analog converter (DAC) from Cirrus Logic, designed for automotive applications with an operating temperature range of -40°C to +105°C. It features a 24-bit multibit delta-sigma architecture supporting audio sample rates up to 192 kHz. The device integrates digital interpolation, volume control, and analog filtering within a 24-pin TSSOP package. Key electrical specifications include a typical dynamic range of 101 dB (A-weighted) and THD+N performance of -81 dB at 3.3 V supply or -91 dB at 5.0 V. It operates on a +3.3 V or +5.0 V analog supply and supports both I²C and SPI control interfaces.

ADCs/DACs - Special Purpose Feature Summary

• Advanced multibit delta-sigma architecture providing ideal linearity and tolerance to clock jitter
• Integrated digital volume control with soft ramp and zero-crossing mute capabilities
• Popguard technology for transient control to minimize clicks and pops during power-up and down
• Supports standard serial audio formats including Time-Division Multiplex (TDM)

ADCs/DACs - Special Purpose Applications

• Automotive audio systems
• DVD players and recorders
• Set-top boxes
• Digital televisions

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'DZZ' confirms the Automotive grade (-40°C to +105°C) and TSSOP-24 package. Confirm that the required control interface mode (I²C or SPI) aligns with the system design, as pin functions for AD0/CS and AD1/CDOUT vary based on the selected mode. Ensure power supply rails match the specified ranges for VA, VLS, and VLC.

ADCs/DACs - Special Purpose Selection Notes

Select the CS4349-DZZ over the Commercial grade (-CZZ) when operation in high-temperature automotive environments exceeding 85°C is required. The device requires external capacitors on VFILT, VQ, and VBIAS pins; ensure layout adheres to recommended grounding and power supply arrangements. Verify load stability requirements, specifically max AC-load resistance of 3 kΩ and capacitance of 100 pF.

ADCs/DACs - Special Purpose Part Context

The CS4349 belongs to Cirrus Logic's 192 kHz DAC family. The '-DZZ' suffix denotes the Automotive temperature grade and TSSOP-24 packaging. This component serves as a complete stereo DAC solution, combining digital processing with analog output stages to reduce external component count in two-channel audio systems.

ADCs/DACs - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Cirrus Logic for current alternative recommendations if this specific automotive-grade variant is unavailable.

ADCs/DACs - Special Purpose FAQ

What is the difference between the CS4349-CZZ and CS4349-DZZ?

The primary difference is the operating temperature range. The CS4349-CZZ is rated for Commercial temperatures (-40°C to +85°C), while the CS4349-DZZ is rated for Automotive temperatures (-40°C to +105°C).

How does the Popguard feature function?

Popguard technology controls transients to prevent clicks and pops. It can be enabled via hardware by pulling the POPGUARD pin high during reset, or disabled for faster startups. It manages power-up, power-down, and discharge times.

What control interfaces are supported?

The CS4349 supports both I²C and SPI control port modes. In I²C mode, pins AD0/CS and AD1/CDOUT serve as address bits. In SPI mode, they function as Chip Select and Data Output respectively.