AD7998BRUZ-0

Overview

The AD7998BRUZ-0 is an 8-channel, 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a single-ended input architecture and operates on a 2.7 V to 5.5 V supply. The device supports I2C-compatible serial interfaces with standard and fast modes, achieving a throughput rate of up to 188 kSPS. Key electrical parameters include a signal-to-noise ratio of 71 dB, integral nonlinearity of ±1 LSB, and differential nonlinearity of +1/–0.9 LSB. It utilizes an external reference voltage ranging from 1.2 V to VDD and functions within a temperature range of −40°C to +85°C in a 20-lead TSSOP package.

Feature Summary

• Integrates an 8-channel multiplexer and track-and-hold amplifier for efficient multi-point data acquisition.
• Supports multiple conversion control modes including one-shot, command mode, and automatic cycle interval operation.
• Includes programmable limit registers that trigger an open-drain alert output when conversion results exceed defined thresholds.
• Features pin-selectable I2C addressing to allow multiple devices on the same serial bus.

Applications

• Industrial process control systems requiring multi-channel monitoring.
• Battery-powered instrumentation utilizing low-power SAR ADC technology.
• Data acquisition modules interfacing via I2C-compatible microcontrollers.

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm interface capabilities. The AD7998-0 variant supports only standard and fast I2C modes, whereas other variants may support high-speed modes. Ensure the selected part matches the required communication speed and address configuration for the target system design.

Selection Notes

Select this component when an 8-channel, 12-bit resolution is required with I2C connectivity. Verify that the application does not require high-speed I2C modes, as the -0 suffix indicates standard and fast mode support only. Confirm that the system can provide an external reference voltage between 1.2 V and VDD to maximize dynamic range.

Part Context

This device belongs to the AD7997/AD7998 family of low-power, 10- and 12-bit SAR ADCs. It shares architectural similarities with the AD7992 and AD7994, which offer 2-channel and 4-channel configurations respectively. All parts utilize the same I2C-compatible interface and power management features.

Replacement Considerations

Direct substitutes include the AD7998BRUZ-1 for applications requiring high-speed I2C support. For lower channel counts, the AD7994 series serves as a functional equivalent. The AD7997 series offers identical functionality with 10-bit resolution.