**AD7998BRUZ-0REEL: A 10-Bit, Low Power, 8-Channel I2C ADC for Precision Measurement Systems**

In the realm of precision measurement and data acquisition, the ability to accurately convert multiple analog signals into a reliable digital format is paramount. The **AD7998BRUZ-0REEL** from Analog Devices stands out as a highly integrated solution designed to meet these exacting demands. This 10-bit, low-power, 8-channel analog-to-digital converter (ADC) leverages the ubiquitous **I2C interface** to provide a compact and efficient pathway for digitizing sensor data in a wide array of applications.

At the core of the AD7998's functionality is its **8-channel multiplexed input** structure. This allows a single device to sequentially measure up to eight different analog voltage signals, significantly reducing system complexity and component count compared to using multiple single-channel ADCs. Each input channel can be configured individually, offering design flexibility. The ADC utilizes a successive approximation (SAR) architecture to deliver its 10-bit resolution, ensuring **fast and accurate conversions** with a typical throughput of up to 188 kSPS when operating on a single channel.

A defining characteristic of the AD7998 is its **exceptionally low power consumption**. It operates from a single 2.7 V to 5.5 V supply, drawing a mere 0.7 mW at 3 V, making it an ideal choice for portable, battery-powered, and power-sensitive equipment. The device also features a flexible power-down mode, which reduces current consumption to less than 1 µA, further conserving energy between conversion cycles.

Communication is streamlined through the **I2C-compatible serial interface**, which supports standard, fast, and high-speed mode (up to 1.7 MHz) operations. This allows for easy connection to a vast majority of microcontrollers and processors without the need for complex glue logic. The interface also supports an address pointer function and multiple device addressing, enabling up to eight AD7998s to be connected on the same bus for systems requiring an even higher channel count.

The inclusion of an on-chip, 2.5 V reference voltage enhances its usability by minimizing external component requirements. For applications demanding higher accuracy, the internal reference can be bypassed in favor of an external reference source. The device is offered in a compact 20-lead TSSOP package, ensuring a small footprint on printed circuit boards (PCBs).

Typical applications for the AD7998BRUZ-0REEL are extensive, including:

* **System Monitoring:** Voltage, current, and temperature monitoring in industrial control systems and server farms.

* **Portable Medical Devices:** Vital signs monitoring equipment where size and power are critical constraints.

* **Consumer Electronics:** Battery management and sensor interface in smart devices.

* **Automotive Systems:** Sensor data acquisition for non-critical functions.

**ICGOOODFIND**: The AD7998BRUZ-0REEL is a highly integrated and efficient solution that combines multi-channel input, low power operation, and a simple digital interface. It effectively bridges the gap between the analog physical world and digital processing systems, making it a superior choice for designers aiming to enhance precision and reduce power consumption in their measurement systems.

**Keywords**: I2C ADC, Low Power Consumption, 8-Channel Multiplexer, Precision Measurement, Successive Approximation Register (SAR)