**AD7323BRUZ: A 12-Bit, 4-Channel Software-Selectable Input Range ADC**

In the realm of data acquisition systems, the ability to accurately digitize multiple analog signals with varying amplitudes is a critical requirement. The **AD7323BRUZ** from Analog Devices addresses this need by offering a highly integrated, precision solution that combines resolution, flexibility, and performance. This 12-bit analog-to-digital converter (ADC) is engineered for applications where input signals can swing between widely different voltage levels, eliminating the need for external conditioning circuitry and simplifying system design.

At its core, the AD7323BRUZ is a **12-bit successive approximation register (SAR) ADC** featuring four analog input channels. Its most distinguishing feature is the **software-selectable input ranges** for each channel. Each input can be independently configured via the serial interface to accept bipolar voltages of ±10 V, ±5 V, or ±2.5 V, and unipolar ranges of 0 to 10 V or 0 to 5 V. This unparalleled flexibility allows a single IC to interface directly with a diverse array of sensors and signal sources, from high-voltage industrial transducers to lower-voltage circuitry, all without manual hardware changes.

The device operates with a **throughput rate of up to 500 kSPS**, ensuring that even rapidly changing signals can be captured with high fidelity. Its SAR architecture provides deterministic latency and no pipeline delay, making it ideal for control loop applications in industrial automation and power management. The internal precision 2.5 V reference is temperature-compensated and delivers stable performance over the specified operating range. For systems requiring an external reference, the AD7323 also provides that option for further design customization.

Communication with a host controller is achieved through a high-speed **SPI-compatible serial interface**, which also facilitates daisy-chaining multiple ADCs on a single bus, reducing component count and PCB space in multi-channel systems. The AD7323BRUZ is offered in a compact 24-lead TSSOP package, suitable for space-constrained applications. It is specified over the industrial temperature range of -40°C to +85°C, ensuring reliability in harsh environments.

Typical applications leveraging the capabilities of the AD7323 include:

* **Industrial Control and Automation Systems:** for PLCs, monitoring multiple sensor types.

* **Data Acquisition Systems (DAQs):** where input signal levels are unpredictable or vary.

* **Power Quality Monitoring:** measuring AC voltages and currents with wide dynamic ranges.

* **Medical Instrumentation:** acquiring data from various biomedical sensors.

**ICGOOODFIND:** The AD7323BRUZ stands out as a highly versatile and integrated ADC solution. Its **software-configurable input ranges** are a significant advantage, dramatically reducing external signal conditioning components and design complexity. For engineers developing multi-channel systems that must handle a variety of analog input voltages with high accuracy, the AD7323BRUZ offers a compelling combination of performance, integration, and flexibility.

**Keywords:** Software-Selectable Input Ranges, 12-Bit SAR ADC, 4-Channel, 500 kSPS, SPI Interface.