This part is a kind of semiconductor called AK5720.

Function of this product has 96kHz 24-Bit ADC.

Manufacturers : AKM

Image and pinout :

Some of the text within the PDF file :

[AK5720] AK5720 96kHz 24-Bit  ADC 1. General Description The AK5720 is a low voltage 24-bit A/D converter for digital audio systems. The AK5720 includes an Input Gain Amplifier, making it suitable for microphone applications. The analog signal input of the AK5720 is single-ended, eliminating the need for external filters. The AK5720 is housed in a space-saving 16-pin TSSOP package. 2. Features 1. Resolution: 24bits 2. Recording Functions  Gain Amplifier (0dB / +15dB)  Digital HPF for DC-offset cancellation (fc=1.0Hz@fs=48kHz) 3. ADC Characteristics  Single-ended Input  Input Level: 1.8Vpp@VA=3.0V (= 0.6 × VA), 3.0Vpp@VA=5.0V (=0.6 × VA)  S/(N+D): 94dB  DR, S/N: 102dB 4. Master Clock: 256fs/384fs/512fs/768fs 5. Sampling Frequency: 8kHz 96kHz 6. Audio Data Forma [ ... ]

AK5720 PDF Datasheet Download