AK4495EQ

ADCs/DACs - Special Purpose Overview

The AK4495EQ is a 32-bit stereo digital-to-analog converter (DAC) designed for high-performance audio systems. It supports PCM data up to 768 kHz and DSD data at 2.8 MHz or 5.6 MHz. The device features full differential switched capacitor filter (SCF) outputs, eliminating the need for AC coupling capacitors. It operates with analog power supplies of 3.0 V to 3.6 V and 4.75 V to 7.2 V. Key electrical specifications include a dynamic range of 120 dB (126 dB in mono mode at 7 V supply), THD+N of -101 dB (-105 dB at 7 V), and an S/N ratio of 120 dB (123 dB at 7 V).

ADCs/DACs - Special Purpose Feature Summary

• 32-bit resolution with 128x oversampling and support for sampling rates from 30 kHz to 768 kHz.
• Integrated 32-bit digital filters including Sharp Roll-off, Slow Roll-off, Short Delay variants, and Super Slow Roll-off.
• Full differential SCF output architecture that removes the requirement for external AC coupling capacitors.
• Supports I2S, MSB/LSB justified formats, and DSD inputs at 2.8 MHz and 5.6 MHz.

ADCs/DACs - Special Purpose Applications

• Network Audio players
• SACD playback devices
• Blu-ray Disc players
• AV receivers

ADCs/DACs - Special Purpose Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the package type is 44-pin LQFP (10x10 mm) and check the operating temperature range of -40°C to +85°C. Ensure power supply sequencing aligns with the datasheet recommendations for AVDD, DVDD, and VDDL/R pins to prevent operational issues.

ADCs/DACs - Special Purpose Selection Notes

Select this DAC when high-resolution audio processing up to 768 kHz PCM or 5.6 MHz DSD is required. Choose the 7 V analog supply option if maximum dynamic range (126 dB mono) and lower distortion (-105 dB THD+N) are critical. Ensure the system design accommodates the separate left and right channel power and reference pins to minimize common-mode impedance effects.

ADCs/DACs - Special Purpose Part Context

The AK4495EQ belongs to the AKM VERITA series, utilizing VELVET SOUND technology. It is part of the AK4495 family, which also includes the AK4495S variant. The EQ suffix denotes the standard commercial temperature grade and packaging configuration within this product line.

ADCs/DACs - Special Purpose Replacement Considerations

The AK4495SEQ is a compatible alternative within the same family, offering special sound quality packaging with identical pinout and functional specifications. Verify that any substitute maintains the 44-pin LQFP form factor and supports the required 768 kHz PCM and DSD input rates.

ADCs/DACs - Special Purpose FAQ

Does the AK4495EQ require AC coupling capacitors?

No, the device features full differential SCF outputs, which remove the need for AC coupling capacitors in the signal path.

What is the maximum supported DSD data rate?

The AK4495EQ accepts DSD data at frequencies of 2.8 MHz and 5.6 MHz.

How many digital filter options are integrated?

The device integrates eight types of 32-bit digital filters, including Sharp Roll-off, Slow Roll-off, Short Delay Sharp/Slow Roll-off, and Super Slow Roll-off variants.