AD7997BRUZ-1

Overview

The AD7997BRUZ-1 is an 8-channel, 10-bit successive approximation analog-to-digital converter (ADC) featuring an I2C-compatible serial interface. It operates from a single 2.7 V to 5.5 V power supply and supports standard, fast, and high-speed I2C modes up to 3.4 MHz. The device includes an internal multiplexer and track-and-hold amplifier, achieving a throughput rate of up to 188 kSPS with a typical conversion time of 2 µs. Key specifications include ±0.5 LSB integral and differential nonlinearity, a signal-to-noise plus distortion ratio of 61 dB minimum, and a shutdown current of 1 µA maximum.

Feature Summary

• I2C-compatible serial interface supporting standard, fast, and high-speed modes for flexible system integration.
• Integrated sequencer operation and automatic cycle mode for efficient multi-channel data acquisition.
• Configurable out-of-range indicator/alert function with programmable high and low limit registers.
• Pin-selectable addressing via the AS pin allows multiple devices on the same serial bus.

Applications

• Battery-powered portable instrumentation systems
• Industrial process control and monitoring
• Data acquisition systems requiring low power consumption

Procurement Notes

Verify the specific suffix 'Z' indicates lead-free compliance and '1' denotes high-speed I2C support. Confirm the package type matches the design requirements. Check for RoHS directives compliance in the latest datasheet revision. Ensure the ordering code aligns with the required temperature range and interface speed capabilities.

Selection Notes

Select this component when eight single-ended channels are required with 10-bit resolution. Consider the AD7998 if 12-bit accuracy is necessary instead. Evaluate the I2C clock frequency requirements against the supported standard, fast, and high-speed modes. Verify that the external reference voltage range accommodates the application's input signal levels.

Part Context

This part belongs to the AD7997/AD7998 family of low-power ADCs. It shares architectural similarities with the AD7992 and AD7994 but offers higher channel counts. The BRU variant specifies the commercial temperature range and TSSOP packaging. It serves as a bridge between simple SAR ADCs and more complex multiplexed data converters.

Replacement Considerations

Direct equivalents include the AD7997BRUZ-0 for standard/fast I2C only. For 12-bit resolution, consider the AD7998BRUZ-1. Lower channel count alternatives are the AD7993 and AD7994 series.