AK4953AEN

Codecs Overview

The AK4953AEN is a low-power stereo audio CODEC integrating microphone, headphone, and speaker amplifiers. It features a 24-bit resolution with an integrated charge pump for capacitor-less output stages. The device supports analog inputs via selectable single-ended channels and includes digital ALC, wind-noise reduction, and notch filters. Power supplies include AVDD (2.85V to 3.5V), DVDD (1.6V to 2.0V), TVDD (DVDD to 3.5V), and SVDD (0.9V to 5.5V). It operates within a temperature range of -30°C to 85°C and utilizes a 36-pin QFN package measuring 5x5mm.

Codecs Feature Summary

• Integrated cap-less headphone amplifier and BTL speaker amplifier driven by a wide voltage range supply.
• Built-in microphone amplifier with selectable gain levels and digital automatic level control circuits.
• Supports multiple clock modes including PLL master/slave and external master/slave configurations.
• Includes digital signal processing features such as de-emphasis filters, equalizers, and beep generation.

Codecs Applications

• Portable electronic devices requiring recording and playback functionality
• Battery-powered systems utilizing direct drive capabilities
• Audio interfaces requiring integrated amplification without external coupling capacitors

Codecs Procurement Notes

Verify the component status before procurement as the AK4953AEN has been officially marked as obsolete or end-of-life. Confirm availability through authorized distributors or secondary markets if active sourcing is required. Ensure that any replacement components maintain compatibility with the original system specifications and power requirements.

Codecs Selection Notes

Select this component when a compact solution combining ADC/DAC conversion with integrated power amplification is necessary. Consider the specific power supply constraints, particularly the separate SVDD requirement for the speaker amplifier. Evaluate the available clocking options against the host processor's interface capabilities to ensure proper synchronization.

Codecs Part Context

This part belongs to the AK4953 series from Asahi Kasei Microdevices. It serves as an evolution in the product line, offering higher resolution compared to previous models like the AK4645. The device is designed to minimize board space usage while providing comprehensive audio processing capabilities for consumer electronics.

Codecs Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Verify compatibility carefully if considering alternative codecs from other manufacturers due to differences in pinout and register configurations.

Codecs FAQ

What is the function of the PVEE and CP pins?

These pins are part of the integrated charge pump circuit. PVEE outputs the negative voltage generated by the pump, while CP and CN connect to external capacitors to facilitate the generation of this negative rail for the output stages.

How does the device handle microphone input selection?

The AK4953A provides three stereo single-ended input selectors. Users can choose between different analog input pins (LIN1/RIN1, LIN2/RIN2, LIN3/RIN3) and configure the internal microphone amplifier gain settings via digital registers.

Can the speaker amplifier operate directly from batteries?

Yes, the speaker amplifier supports a wide operating voltage range from 0.9V to 5.5V on the SVDD pin, enabling direct drive from battery sources without additional boosting circuitry.