News Release
- New Product Information -

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AKM developed audio A/D converter with built-in 4-channel microphone amplifier with DR 109[dB] at 9.7[mW], which is connectable to current output sensors



Asahi Kasei Microdevices Corporation (AKM) has developed the AK5705, a low power consumption 4-channel 32-bit A/D converter (ADC) with a built-in transimpedance amplifier in addition to a low-noise microphone amplifier.

This product supports a sampling frequency of 384[kHz] and achieves a dynamic range of 109[dB], while consuming 43[%] less power than our conventional products. Furthermore, the built-in AC coupling capacitor significantly reduces the mounting area including external components.

The built-in transimpedance amplifier allows connection to current-output sensors also such as photodiodes.

Samples of the AK5705 are currently provided and its sale will commence in the fourth quarter of 2023.

昇圧型 DC/DC コンバーター AP4473


109[dB] dynamic range with low power consumption

The AK5705 has a 4-channel ADC that ensures 32-bit resolution and 109[dB] dynamic range. It supports up to 384[kHz] sampling and can be combined with wideband microphones. The power consumption at AVDD = 3.3[V], 4-ch ADC, 48[kHz] sampling operation is 9.69[mW].

Significant reduction in mounting area including external components

No external AC coupling capacitors are required for analog inputs, so systems can be built with fewer external components.

Built-in transimpedance amplifier

A transimpedance amplifier for current-to-voltage conversion is built in to convert the output current of the sensor or photodiode to digital data.


  • Wearable Devices
  • Augmented Reality/Virtual Reality Devices (AR/VR)
  • Microphone array systems
  • Security equipment
  • IC Recorders