AK4420VT

ADCs/DACs - Special Purpose Overview

The AK4420VT is a 5V 24-bit stereo delta-sigma DAC featuring an integrated single-ended 2Vrms output buffer. It utilizes AKM’s multi-bit modulator architecture to deliver high linearity and dynamic range. The device supports sampling rates from 8kHz to 192kHz with oversampling ratios of 32x, 64x, or 128x depending on the mode. Key electrical specifications include a THD+N of -92dB and a dynamic range of 105dB. It operates within a supply voltage range of +4.5V to +5.5V and includes a charge pump for internal negative rail generation.

ADCs/DACs - Special Purpose Feature Summary

• 24-bit resolution with 192kHz maximum sampling rate
• Integrated single-ended 2Vrms output buffer with charge pump
• Switched-capacitor filter (SCF) tolerant to clock jitter
• Supports I2S and 24-bit MSB justified audio interfaces

ADCs/DACs - Special Purpose Applications

• DVD players
• AV receiver systems
• Set-top boxes

ADCs/DACs - Special Purpose Procurement Notes

Verify the ordering suffix VT indicates the extended temperature range of -40°C to +85°C, distinct from the ET variant (-20°C to +85°C). Confirm the package is 16-pin TSSOP with 0.65mm pitch. Ensure peripheral components, specifically capacitors for the charge pump circuit, meet low ESR requirements across the operating temperature range.

ADCs/DACs - Special Purpose Selection Notes

Select the AK4420VT when an extended industrial temperature range (-40°C to +85°C) is required compared to the standard ET version. This component is suitable for applications needing a ground-referenced analog output without external op-amps. Verify that the system master clock can support the required frequencies (up to 11.2896 MHz) for the desired oversampling mode.

ADCs/DACs - Special Purpose Part Context

The AK4420VT is part of the AK4420 family from Asahi Kasei Microdevices. It shares pinout compatibility with the AK4421 and AK4424 models, though functional features like digital de-emphasis vary between variants. The VT suffix specifically denotes the wider ambient operating temperature capability compared to the ET suffix.

ADCs/DACs - Special Purpose Replacement Considerations

The datasheet notes compatibility with AK4421 and AK4424 regarding pin-out. However, feature differences such as digital de-emphasis availability must be verified before substitution. No other direct replacement part numbers are explicitly listed in the provided documentation.