**The ADAU7002ACBZ-RL: A Low-Power Stereo ADC for Digital Microphone Systems**

In the rapidly evolving world of audio capture, the demand for high-fidelity, low-power, and compact solutions is greater than ever. The **ADAU7002ACBZ-RL** from Analog Devices stands out as a highly specialized integrated circuit designed to meet these exact needs in modern digital microphone systems. This component is a stereo analog-to-digital converter (ADC) that serves as a critical bridge, converting the analog output from MEMS (Micro-Electro-Mechanical Systems) microphones into a clean, precise digital pulse-density modulated (PDM) bitstream.

The core function of the ADAU7002 is to act as an interface for analog MEMS microphones, which offer a compelling alternative to their digital counterparts. While digital MEMS microphones have a built-in ADC, analog versions output a small analog signal that requires external conditioning and conversion. This is where the ADAU7002 excels. It accepts the low-voltage analog signals from two microphones, providing a stereo input path. Its internal architecture features a **high-performance, low-noise ADC** for each channel, ensuring that the subtle nuances of audio are captured with clarity and minimal added distortion.

A defining characteristic of the ADAU7002ACBZ-RL is its exceptionally **low power consumption**. Operating on a mere 1.8 V supply and consuming only 1.45 mW of power, it is ideally suited for battery-powered and always-on applications. This makes it a perfect fit for the expanding universe of portable electronics, including smartphones, laptops, hearing aids, and IoT devices like smart speakers and security sensors, where energy efficiency is paramount for extended battery life.

Furthermore, the device integrates a programmable gain amplifier (PGA), allowing designers to adjust the input gain to match the sensitivity of various analog MEMS microphones. This flexibility ensures optimal signal levels and maximizes the dynamic range of the audio system. The output is delivered as a PDM stream, a common format for digital audio that can be easily processed by digital signal processors (DSPs), application processors, or codecs with PDM inputs.

Housed in a compact **2.35 mm × 1.65 mm WLCSP (Wafer-Level Chip-Scale Package)**, the ADAU7002ACBZ-RL addresses the critical need for saving valuable PCB real estate in space-constrained designs. Its small footprint allows engineers to incorporate high-quality stereo audio capture into even the most miniature devices without compromising on performance.

**ICGOO**DFIND: The ADAU7002ACBZ-RL is an essential component for designers seeking to implement high-quality, stereo audio capture using analog MEMS microphones. Its combination of **ultra-low power operation**, integrated programmability, and a minuscule form factor provides a powerful and efficient solution that is perfectly aligned with the requirements of next-generation portable and smart audio devices.

**Keywords:** Low-Power ADC, Stereo PDM Output, Analog MEMS Interface, Portable Audio Systems, Digital Microphone Systems