AK4373EN

ADCs/DACs - Special Purpose Overview

The AK4373EN is a 24-bit stereo digital-to-analog converter (DAC) manufactured by Asahi Kasei Microdevices. It integrates a built-in phase-locked loop (PLL) and a headphone amplifier, designed for portable audio applications. The device supports sampling rates from 8kHz to 48kHz and features an on-chip FIR interpolator for perfect filtering. Key electrical parameters include a typical operating supply voltage of 3.3V or 5V, with a maximum power dissipation of 800mW. It operates within a temperature range of -40°C to 85°C and utilizes a 20-pin QFN EP package.

ADCs/DACs - Special Purpose Feature Summary

• 24-bit multi-bit ΔΣ DAC architecture with integrated PLL and headphone amplifier
• On-chip 8x FIR interpolator providing passband ripple of ±0.02dB and stopband attenuation of 54dB
• Supports I2S, 24-bit MSB justified, and 24/20/16-bit LSB justified audio interfaces
• Headphone amplifier delivers 40mW output power into 16Ω loads at 3.3V

ADCs/DACs - Special Purpose Applications

• Mobile phones and portable communication devices
• Portable media players and MP3 players
• Digital audio recorders and voice memo devices

ADCs/DACs - Special Purpose Procurement Notes

Verify the current part status as obsolete before procurement planning. Confirm package availability in the 20-pin QFN EP format. Check for RoHS compliance and ECCN classification EAR99. Ensure design compatibility with existing system clocks and interface protocols.

ADCs/DACs - Special Purpose Selection Notes

Select this component for designs requiring high-resolution audio conversion with integrated amplification. Verify that the required sampling rate falls within the 8kHz to 48kHz range. Ensure the system can accommodate the specified supply voltages and power dissipation limits. Compare register compatibility with similar models like the AK4368 if pin-swapping is considered.

ADCs/DACs - Special Purpose Part Context

The AK4373EN belongs to the AK43xx series of audio codecs from Asahi Kasei Microdevices. It shares functional similarities with the AK4372 but differs in specific integration levels and packaging. This series targets the mobile and portable electronics market, emphasizing low power consumption and small form factors.

ADCs/DACs - Special Purpose Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The AK4372 is noted as register compatible with the AK4368, but direct substitution for the AK4373EN requires verification against specific application requirements.