AK4558EN

Codecs Overview

The AK4558EN is a low voltage, 32-bit, 216kHz delta-sigma CODEC designed for high-performance battery-powered digital audio subsystems. It features an internal 32-bit digital filter with short group delay and OSR-Doubler technology for low out-of-band noise. The device supports single-ended ADC and DAC inputs/outputs to minimize pin count and external filtering requirements. Key specifications include a dynamic range and S/N of 108dB at AVDD=3.3V, with power supply currents of 18mA at fs=48kHz. It operates within an ambient temperature range of -40°C to +105°C and is housed in a compact 28-pin QFN package.

Codecs Feature Summary

• Integrates newly developed 32-bit Digital Filter achieving short group delay and high quality sound.
• Adopts OSR-Doubler technology to support wide range signals while realizing low power consumption.
• Features selectable HPF for DC-offset cancellation and channel independent digital attenuator with 256 levels.
• Supports multiple audio interface formats including MSB First, 2’s Complement, I2S compatible, and TDM.

Codecs Applications

• Electronic musical instruments
• Audio Interfaces
• High performance battery powered digital audio subsystems

Codecs Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature rating. Confirm that the component matches the required 28-pin QFN form factor and electrical specifications for your design. Cross-reference the datasheet revision history to ensure compatibility with existing system designs.

Codecs Selection Notes

Select this component when space-sensitive applications require high sound quality with minimal external filtering. Consider the single-ended input/output configuration if minimizing pin count is critical. Ensure the system clock requirements align with the supported PLL modes or external clock speeds up to 216kHz sampling rate.

Codecs Part Context

The AK4558EN is part of Asahi Kasei Microdevices' portfolio of high-performance audio CODECs. It serves as an evolution in low-voltage audio processing, offering improved power efficiency and reduced group delay compared to previous generations. The device is positioned for applications demanding high fidelity in compact, battery-operated environments.

Codecs Replacement Considerations

The AK4556 is documented as a compatible predecessor with similar maximum sampling rates but lacks some advanced features like the integrated PLL and parallel mode support. Verify pinout compatibility and register mapping differences before substitution.

Codecs FAQ

What is the maximum sampling rate supported by the AK4558EN?

The AK4558EN supports a maximum sampling rate of 216kHz.

Does the AK4558EN support TDM interface format?

Yes, the device supports TDM (Time Division Multiplexing) format for both ADC and DAC data interfaces.

What is the typical power supply current at 48kHz sampling rate?

The typical power supply current is 18mA when operating at a sampling rate of 48kHz.