AK7604VQ

Overview

The AK7604VQ is a highly integrated audio digital signal processor manufactured by Asahi Kasei Microdevices. It features a 28-bit programmable DSP with 2560 steps/fs processing power, a 24-bit stereo ADC with input selector, three 24-bit stereo DACs, and four stereo sampling rate converters (SRC) supporting frequencies up to 192kHz. The device operates on multiple power supplies: AVDD, LVDD, VDD33 (3.0V–3.6V), and TVDD (1.7V–3.6V). Key electrical specifications include an ADC S/N of 106dB at fs=48kHz and a DAC S/N of 108dB at fs=48kHz. It supports I2C and SPI interfaces for control and utilizes a 48-pin LQFP package.

Feature Summary

• Integrated Audio DSP with 28-bit word length, 24x24 multiplier, and freely programmable architecture.
• 24-bit Stereo ADC with selectable differential/single-ended inputs and channel-independent analog gain (0-36dB).
• Three independent 24-bit Stereo DACs with single-ended outputs and digital volume control.
• Four stereo Sampling Rate Converters (SRC) supporting input/output rates from 8kHz to 192kHz.

Applications

• High-end home theater systems
• Digital TVs and set-top boxes
• Car entertainment and audio systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official guide to ensure correct packaging and temperature grade. Confirm that the required power supply voltages (AVDD/LVDD/VDD33 at 3.0-3.6V and TVDD at 1.7-3.6V) match the system design. Ensure the 48-LQFP footprint dimensions (7mm x 7mm) are compatible with the PCB layout.

Selection Notes

Select this component when a high-performance audio DSP with integrated conversion is required. The AK7604VQ supports up to 192kHz sampling rates for SRCs and 96kHz for ADC/DAC blocks. Consider the 28-bit DSP capability for complex acoustic processing tasks. Verify interface compatibility with I2C or SPI masters and check if the available serial data ports (4 inputs, 3 outputs) meet the system connectivity needs.

Part Context

The AK7604 belongs to AKM's family of audio digital signal processors designed for premium sound applications. It combines advanced DSP capabilities with high-fidelity analog-to-digital and digital-to-analog conversion in a single package. This integration reduces external component count and simplifies board design for consumer audio electronics requiring multi-channel processing and format conversion.

Replacement Considerations

Consult the official AKM replacement guide for verified cross-references. No direct substitute part numbers are confirmed in the provided documentation.

FAQ

What is the maximum sampling frequency supported by the Sampling Rate Converters?

The four stereo SRC channels support both input and output sampling frequencies ranging from 8kHz to 192kHz.

How many power supply pins does the AK7604VQ require?

The device requires four distinct power supply domains: Analog (AVDD), Digital Core (LVDD), Digital I/F (VDD33), and Digital I/O (TVDD).

What is the dynamic range of the ADC block?

The ADC achieves a dynamic range of 106dB (A-weighted) at fs=48kHz with differential input and 0dB analog gain.