AD7998BRU-0

Overview

The AD7998BRU-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 from a 2.7 V to 5.5 V supply. The device integrates an I2C-compatible serial interface supporting standard and fast modes, with pin-selectable addressing via the AS pin. Key electrical parameters include a maximum throughput rate of 188 kSPS, a typical conversion time of 2 µs, and a signal-to-noise ratio (SNR) of 71 dB. It operates within a temperature range of −40°C to +85°C and is housed in a 20-lead TSSOP package.

Feature Summary

• Integrates an 8-channel multiplexer and track-and-hold amplifier for single-ended signals.
• Supports I2C-compatible serial communication with multiple address options.
• Includes programmable limit registers with an out-of-range alert function.
• Features automatic shutdown mode to minimize power consumption between conversions.

Applications

• Battery-powered data acquisition systems requiring low power consumption.
• Industrial process control monitoring with multiple sensor inputs.
• Portable instrumentation utilizing single-supply operation.

Procurement Notes

Verify the specific suffix designation against the manufacturer's current ordering guide to ensure compatibility with required I2C speed modes. Confirm that the package type matches the target PCB footprint requirements. Check for any lead-free or RoHS compliance updates relevant to the manufacturing date code before finalizing procurement specifications.

Selection Notes

Select this component when eight single-ended channels are required with moderate resolution and low power constraints. Ensure the system design accommodates an external voltage reference connected to the REFIN pin. Verify that the host microcontroller supports the necessary I2C clock frequencies for the desired throughput rate.

Part Context

This part belongs to the AD7997/AD7998 family of low-power, multi-channel ADCs. It serves as the 12-bit variant within this series, offering higher resolution than the 10-bit AD7997 while maintaining similar interface and packaging characteristics. It complements other devices in the product line such as the AD7992 and AD7994 which offer fewer channels.

Replacement Considerations

The AD7998BRUZ-0REEL is available in reel packaging variants. For lower resolution needs, the AD7997 series may be considered. Other channel counts are available in the AD7992 and AD7994 families.