AK4556VT

Codecs Overview

The AK4556VT is a low voltage 24-bit stereo CODEC designed for high-performance battery-powered digital audio subsystems. It supports sampling rates up to 216kHz and achieves a dynamic range of 103dB for the ADC and 106dB for the DAC at a 3.0V analog supply. The device features single-ended inputs and outputs, an integrated switched-capacitor filter to reduce jitter sensitivity, and operates within a 2.4V to 3.6V power supply range. Packaged in a compact 20-pin TSSOP, it includes master/slave modes, digital de-emphasis, and a programmable high-pass filter.

Codecs Feature Summary

• Integrates single-ended ADC and DAC with high dynamic performance ratios relative to supply voltage.
• Includes an internal switched-capacitor filter to minimize system jitter sensitivity.
• Supports multiple audio interface formats including MSB justified, LSB justified, and I2S compatible modes.
• Features a programmable digital high-pass filter for DC-offset cancellation.

Codecs Applications

• High-performance battery-powered digital audio subsystems
• Space-sensitive portable audio devices
• Digital audio playback equipment

Codecs Procurement Notes

Verify component authenticity through authorized channels as the part status is listed as obsolete. Confirm that the specific package variant matches the 20-pin TSSOP requirement. Ensure design compatibility with existing power supply rails and clocking architectures before procurement.

Codecs Selection Notes

Select this component for applications requiring high dynamic range in a small form factor. Verify that the required sampling rate falls within the supported 8kHz to 216kHz range. Ensure the system design accommodates the single-ended input/output architecture and provides appropriate decoupling for the analog and digital supplies.

Codecs Part Context

The AK4556VT belongs to the AK4556 family of audio CODECs manufactured by Asahi Kasei Microdevices. It serves as an upper-compatible successor to the AK4552, offering higher maximum sampling frequencies and improved filter characteristics while maintaining similar functional interfaces.

Codecs Replacement Considerations

The AK4552 is documented as a functionally compatible predecessor. Designers should verify differences in sampling frequency limits, filter cutoff frequencies, and pin configurations when considering substitution.