AK4628AVQ

Codecs Overview

The AK4628AVQ is a single-chip audio CODEC featuring two 24-bit ADC channels and eight 24-bit DAC channels. It utilizes an Enhanced Dual Bit architecture for the ADC and an Advanced Multi-Bit architecture for the DAC, achieving dynamic ranges of 102dB and 106dB respectively. The device supports sampling rates up to 96kHz for ADC and 192kHz for DAC. Power supplies are specified at 4.5V to 5.5V for analog and digital sections, with a separate 2.7V to 5.5V supply for output buffers. It operates within a temperature range of -40°C to +85°C and is housed in a compact 44-pin LQFP package.

Codecs Feature Summary

• Integrates two-channel ADC and eight-channel DAC with high-resolution 24-bit data processing capabilities.
• Supports multiple serial interface formats including MSB justified, LSB justified, I2S, and TDM modes.
• Includes individual channel digital volume control with soft mute functionality and de-emphasis filters.
• Features auxiliary digital audio input interface for bypassing ADC data directly to DAC outputs.

Codecs Applications

• Digital surround sound systems for home theater environments
• Multi-channel audio processing in automotive audio systems
• AC-3 system implementations utilizing external SPDIF receivers

Codecs Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the ordering suffix matches the required operating temperature range and package type. Ensure power supply voltages align with the specified 4.5V to 5.5V requirements for proper operation.

Codecs Selection Notes

Select this model when multi-channel output is required alongside stereo input. Consider the specific power supply constraints as it requires higher voltage rails compared to standard 3.3V devices. Evaluate pin compatibility if replacing legacy components like the AK4529, noting differences in sampling rates and register configurations.

Codecs Part Context

This component belongs to the AK4628A series of high-performance multi-channel audio CODECs manufactured by Asahi Kasei Microdevices. It is designed to provide scalable audio solutions for complex systems requiring simultaneous analog-to-digital and digital-to-analog conversion across multiple channels.

Codecs Replacement Considerations

The AK4628A offers pin compatibility with the AK4529. However, designers must account for differences in maximum sampling frequencies, digital attenuator levels, and register address mappings during integration or replacement processes.

Codecs FAQ

What is the function of the SDOS pin?

The SDOS pin selects the source for the SDTO output. When set to low, it outputs internal ADC data; when high, it outputs the DAUX input data converted to the SDTO format.

How is the zero detect function configured?

Zero detection is configured via the DZFM bits in the control registers when using serial mode. It monitors continuous zero input data over 8192 LRCK cycles and triggers output flags on the DZF1 or DZF2 pins.

Can the AK4628AVQ operate in master mode?

No, the datasheet specifies that MCLK, LRCK, and BICK are input pins. The device relies on external clocks for synchronization and does not generate master clock signals internally for the system.