AK4550XTX

ADCs/DACs - Special Purpose Overview

The AK4550XTX is a low-voltage, 16-bit audio codec manufactured by Asahi Kasei Microdevices (AKM). It integrates a single-ended analog-to-digital converter (ADC) and a digital-to-analog converter (DAC) designed for portable digital audio systems. The device operates on a supply voltage range of 2.3V to 3.6V with a typical supply current of 10mA. Key electrical specifications include an ADC dynamic range of 89dB and a DAC dynamic range of 92dB at VDD=2.5V. It supports sampling rates from 8kHz to 50kHz and utilizes MSB First or 2's Complement audio interfaces.

ADCs/DACs - Special Purpose Feature Summary

• Integrated 16-bit stereo A/D and D/A converters with single-ended analog inputs/outputs
• Built-in High-Pass Filter (HPF) for DC-offset cancellation with a cutoff frequency of 3.4Hz
• Digital de-emphasis support for 32kHz, 44.1kHz, and 48kHz sampling rates
• High jitter tolerance utilizing SCF techniques for on-chip post-filtering

ADCs/DACs - Special Purpose Applications

• Portable digital audio players and recorders
• Mobile communication devices requiring low-power audio processing
• Compact consumer electronics with space-constrained PCB layouts

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'XTX' against the official Asahi Kasei Microdevices datasheet to confirm tape-and-reel packaging and temperature grade. Ensure compatibility with the required 2.3V–3.6V power supply domain. Cross-reference pinout configurations with existing designs to prevent interface mismatches during integration.

ADCs/DACs - Special Purpose Selection Notes

Select this component when single-ended analog interfaces are sufficient, eliminating the need for external differential-to-single-ended conversion circuits. The integrated HPF simplifies design by removing external components typically required for DC offset removal. Verify that the maximum 50kHz sampling rate meets the application's bandwidth requirements.

ADCs/DACs - Special Purpose Part Context

The AK4550XTX belongs to the AKM low-power audio codec family, serving as a successor or alternative to the AK4518 in ultra-compact applications. It shares functional similarities with the AK4551 but offers a reduced feature set tailored for cost-sensitive portable devices. The TSSOP-16 package minimizes board space consumption compared to larger QFP packages.

ADCs/DACs - Special Purpose Replacement Considerations

The AK4518 is a documented compatible alternative within the same manufacturer portfolio, offering similar interface protocols. Verify pin-to-pin compatibility and ensure that the target application does not require the higher dynamic range or additional features found in the AK4551.