This Sigma-Delta ADC offers precise 16-bit resolution and is implemented in SMIC's 55nm 2P7M CMOS technology. It supports a programmable gain range from 0 to 50dB and selectable microphone biases, making it adaptable for a range of audio processing applications. This ADC offers distinct analog and digital interfaces, with a PDM/I2S/TDM serial output, and consumes minimal current, enhancing its suitability for portable audio applications. With a notable 90dB SNR, it is capable of delivering high-fidelity audio outputs, crucial for advanced sound systems.