**AD7322BRUZ: A 12-Bit, 4-/8-Channel Software-Configurable Dual-Supply SAR ADC**

In the realm of data acquisition systems, the ability to accurately digitize multiple analog signals with high precision and flexibility is paramount. The **AD7322BRUZ from Analog Devices** stands out as a sophisticated solution, integrating a **12-bit successive approximation register (SAR) analog-to-digital converter (ADC)** with a highly versatile input structure. This device is engineered for complex applications where channel count, input range flexibility, and robust performance are critical.

A defining feature of the AD7322BRUZ is its **software-configurable analog input channels**. The device can be operated as either **4 single-ended, 2 fully differential, or 4 pseudo-differential inputs**, and through software command, it can be configured to utilize 8 single-ended channels. This immense flexibility allows designers to adapt a single ADC to interface with a wide variety of sensors and signal sources, simplifying system design and reducing board space.

Another significant advantage is its **unique dual-supply operation**. The analog circuitry, including the analog input ranges, can be powered by ±V supplies (e.g., ±12 V or ±5 V), while the digital interface operates from a single +5 V or +3 V supply. This architecture enables the ADC to handle **bipolar analog input signals directly**, such as ±10 V, ±5 V, ±2.5 V, and 0 to +10 V, without requiring external conditioning circuitry. This capability is invaluable in industrial control and instrumentation systems where signals often span both positive and negative voltages.

The core of the AD7322BRUZ is a high-performance **12-bit SAR ADC**, capable of achieving a **throughput rate of up to 500 kSPS**. The SAR architecture ensures no pipeline delay, making it ideal for multiplexed applications where phase information is critical. It offers excellent AC performance and fast transient response, capturing signals accurately across its selected input range.

Communication with a microcontroller or processor is streamlined through a **high-speed, SPI-compatible serial interface**. The interface supports both 3V and 5V logic levels, ensuring easy connection to modern processors. On-chip registers allow for easy configuration of input ranges, channel selection, and operating modes, putting full control at the designer's fingertips.

**ICGOOODFIND**: The AD7322BRUZ is a powerhouse of integration and flexibility, perfectly suited for demanding applications in industrial process control, automated test equipment (ATE), power quality monitoring, and multi-parameter data acquisition systems. Its combination of software-configurable inputs, wide bipolar input ranges, and dual-supply operation makes it an exceptionally versatile and powerful choice for system designers.

**Keywords**: Software-Configurable ADC, Dual-Supply Operation, SAR ADC, Bipolar Input Ranges, High-Throughput