AK4120VF

Overview

The AK4120VF is a stereo asynchronous sample rate converter (SRC) with integrated digital mixer and volume control, manufactured by Asahi Kasei Microdevices. It accepts input sample rates from 8kHz to 48kHz and supports fixed output rates of 32kHz, 44.1kHz, 48kHz, or 96kHz. The device features a THD+N of –113dB at 1kHz input and operates on a 2.7V to 3.6V supply. It includes two audio inputs and one output, supporting I2S, MSB justified, and LSB justified interfaces via I2C or 3-wire serial control. Packaged in a 24-VSOP (LSSOP) format, it functions within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Stereo asynchronous sample rate conversion with input range 8kHz–48kHz and output options 32/44.1/48/96kHz
• Integrated digital mixer and dual digital volume controls (-83.25dB to +12dB)
• THD+N of –113dB at 1kHz input frequency
• Supports I2S, MSB justified, and LSB justified audio data formats

Applications

• Professional audio mastering systems
• Consumer audio format conversion equipment
• Desktop audio production and playback devices

Procurement Notes

Verify the specific suffix 'VF' corresponds to the 24-pin VSOP package and industrial temperature grade (-40°C to 85°C). Confirm interface compatibility for I2C or 3-wire serial control modes as required by the system design. Ensure power supply rails are stable between 2.7V and 3.6V during operation.

Selection Notes

Select this component when asynchronous SRC functionality is required alongside mixing and volume control in a single IC. It is suitable for designs needing conversion between common audio rates like 48kHz and 44.1kHz. Verify that the host processor can support either I2C or 3-wire serial protocols for register configuration.

Part Context

The AK4120VF belongs to the AK4120 series of audio interface ICs. It is distinct from higher-speed variants like the AK4127, which supports up to 216kHz. This model focuses on standard CD and professional audio rates (up to 96kHz output) with integrated signal processing features.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official obsolescence notices or equivalent product guides for cross-references.