CS5361-DZZR

ADCs/DACs - Special Purpose Overview

The CS5361-DZZR is a 24-bit, multi-bit delta-sigma audio analog-to-digital converter (ADC) from Cirrus Logic. It features two differential analog inputs and supports system sampling rates up to 192 kHz per channel. The device integrates a 5th-order modulator with digital filtering and decimation, eliminating the need for external anti-alias filters. Key electrical specifications include a typical dynamic range of 114 dB and -105 dB THD+N at 48 kHz. It operates on a single 5 V analog supply and logic supplies between 2.5 V and 5 V. The component is housed in a 24-pin TSSOP package and is rated for an ambient operating temperature range of -40°C to +85°C.

ADCs/DACs - Special Purpose Feature Summary

• Advanced Multi-bit Delta-sigma Architecture: Uses a 5th-order modulator followed by digital filtering and decimation to remove the need for external anti-alias filters.
• High Performance: Delivers 114 dB dynamic range and -105 dB THD+N with negligible distortion and low noise.
• Integrated Signal Conditioning: Includes a high-pass filter and DC offset calibration circuitry to prevent recording DC levels.
• Flexible Interface: Supports serial audio data output in Left Justified or I2S formats with master or slave clocking modes.

ADCs/DACs - Special Purpose Applications

• A/V receivers
• DVD-R and CD-R recorders
• Digital mixing consoles
• Audio effects processors

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific ordering suffix '-DZZR' to confirm the extended temperature rating (-40°C to +85°C) and TSSOP-24 packaging. Ensure that the power supply decoupling capacitors are positioned as close to the FILT+ and REFGND pins as possible to minimize electrical path length and avoid unwanted coupling into the modulators.

ADCs/DACs - Special Purpose Selection Notes

Select the CS5361-DZZR over commercial variants when operation in automotive or industrial environments requiring temperatures down to -40°C is necessary. Confirm that the system requires a 24-bit resolution with a maximum sample rate of 192 kHz. Verify that the available power supplies can provide the required 5 V analog voltage and appropriate logic levels for the VL pin.

ADCs/DACs - Special Purpose Part Context

The CS5361 belongs to Cirrus Logic's family of 24-bit audio ADCs designed for high-fidelity digital audio systems. It is pin-compatible with the CS5381. The device performs sampling, analog-to-digital conversion, and anti-alias filtering within a single integrated circuit, generating 24-bit values for left and right channels in serial form.

ADCs/DACs - Special Purpose Replacement Considerations

The CS5361-KZZR is a pin-compatible alternative but is limited to a commercial temperature range of -10°C to +70°C. Direct replacement requires verifying that the lower temperature limit of the KZZR variant meets the environmental requirements of the target application.

ADCs/DACs - Special Purpose FAQ

How does the CS5361 handle DC offset?

The device includes a high-pass filter after the decimator to continuously subtract measured DC offset. The HPF pin allows freezing the stored DC offset value to perform system calibration, preventing clicks when switching between devices.

What is the function of the OVFL pin?

The OVFL pin is an open-drain output that detects overflow conditions on both left and right channels. It goes active low immediately upon detecting an overrange condition and remains low for a specified timeout period.

Can the CS5361 operate without an external anti-alias filter?

Yes. The internal 5th-order multi-bit delta-sigma modulator followed by digital filtering and decimation removes the need for an external anti-alias filter.