AK5397EQ

ADCs/DACs - Special Purpose Overview

The AK5397EQ is a high-performance 32-bit stereo analog-to-digital converter (ADC) from Asahi Kasei Microdevices. It achieves a dynamic range of 127dB and supports sampling rates up to 768kHz PCM. The device integrates three selectable digital filters: Sharp Roll-Off, Short Delay, and Minimum Phase. It features full differential inputs, master/slave operation modes, and TDM interface capabilities. Power supplies are separated into AVDD (4.75V–5.25V) and DVDD (3.0V–3.6V).

ADCs/DACs - Special Purpose Feature Summary

• 32-bit resolution with 127dB dynamic range in stereo mode.
• Supports sampling frequencies from 8kHz to 768kHz.
• Integrates Sharp Roll-Off, Short Delay, and Minimum Phase digital filters.
• Full differential analog inputs with integrated voltage references.

ADCs/DACs - Special Purpose Applications

• Digital video recorders
• High-quality sound studio mixers
• Recording and editing high-resolution sound sources

ADCs/DACs - Special Purpose Procurement Notes

Verify the component status as the datasheet indicates potential obsolescence or discontinuation. Confirm availability through authorized distributors or secondary markets. Ensure the package matches the 44-pin LQFP specification for physical compatibility.

ADCs/DACs - Special Purpose Selection Notes

Select this ADC when high channel isolation (130dB typical) and low passband ripple are required. Choose between filter types based on latency requirements: Minimum Phase for lowest delay (3.5/fs) or Sharp Roll-Off for maximum stopband attenuation (100dB). Verify power supply decoupling for AVDD and DVDD.

ADCs/DACs - Special Purpose Part Context

The AK5397EQ belongs to the VERITA series within the Audio 4 Pro family. It utilizes VELVET SOUND technology to enhance sound field and bass representation. This series targets premium audio applications requiring high-fidelity conversion without external digital filtering components.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for current portfolio alternatives if this specific model is discontinued.

ADCs/DACs - Special Purpose FAQ

What are the supported audio interface formats?

The AK5397EQ supports 32-bit MSB justified and I2S compatible formats, selectable via the DIF pin.

How does the Mono Mode affect performance?

In Mono Mode, the dynamic range increases to 130dB, compared to 127dB in Stereo Mode.

What is the group delay for the Minimum Phase filter?

The Minimum Phase filter has a group delay of approximately 3.5/fs at 48kHz sampling rate.