**ADAU7112ACBZR7: A Low-Power, High-Performance PDM-to-I2S/TDM Converter for Digital Microphone Systems**

The proliferation of digital microphones in modern consumer electronics, from smart speakers and headphones to conference systems, has created a critical need for efficient interface solutions. The **ADAU7112ACBZR7 from Analog Devices** stands out as a highly integrated converter designed specifically to bridge the gap between pulse-density modulation (PDM) microphones and industry-standard digital audio interfaces. This device is engineered to deliver exceptional audio fidelity while operating at remarkably low power, making it an ideal choice for power-sensitive portable applications.

At its core, the ADAU7112 converts the single-bit PDM data streams from one or two digital microphones into a clean, high-resolution pulse-code modulation (PCM) output. It supports both **Inter-IC Sound (I2S)** and **Time Division Multiplexing (TDM)** serial data formats, providing designers with the flexibility to interface with a wide range of host processors, digital signal processors (DSPs), and audio codecs. This versatility is crucial for developing complex multi-microphone arrays used in beamforming and noise cancellation systems.

A key strength of the ADAU7112 is its **ultra-low power consumption**. In an era where battery life is a paramount concern, this converter minimizes its power draw, typically consuming less than 2 mW from a 1.8 V supply. This efficiency does not come at the expense of performance. The device incorporates a sophisticated digital decimation filter and a sigma-delta (ΔΣ) modulator that work in tandem to produce high-quality audio with a **dynamic range exceeding 109 dB**, ensuring crystal-clear audio capture with minimal background noise.

Furthermore, the chip simplifies system design. Its built-in microphone bias voltage generator can power two microphones directly, eliminating the need for external components and reducing the overall bill of materials (BOM) and PCB footprint. The package, a compact 10-Ball WLCSP, is perfectly suited for space-constrained designs. The converter also handles clock generation and synchronization automatically, freeing the main application processor from these tasks and simplifying the software driver development.

**ICGOODFIND**: The ADAU7112ACBZR7 is a cornerstone component for modern digital audio systems, masterfully balancing high-performance audio conversion with the stringent power and space requirements of portable and always-on devices. Its robust integration and format flexibility make it an indispensable solution for engineers aiming to implement high-fidelity microphone systems efficiently.

**Keywords**: PDM-to-I2S/TDM Converter, Low-Power, Digital Microphone Interface, High Dynamic Range, Audio Signal Processing.