AD7994BRUZ-0REEL

Overview

The AD7994BRUZ-0REEL is a 12-bit successive approximation analog-to-digital converter (ADC) featuring four single-ended analog input channels and an I2C-compatible serial interface. It operates from a single 2.7 V to 5.5 V power supply with a typical conversion time of 2 µs and a throughput rate up to 188 kSPS. The device includes a track-and-hold amplifier capable of handling input frequencies up to 11 MHz. Key specifications include a signal-to-noise ratio of 71 dB, integral nonlinearity of ±1 LSB max, and differential nonlinearity of +1/–0.9 LSB max. It supports standard and fast I2C modes, features pin-selectable addressing via the AS pin, and offers shutdown mode current consumption of 1 µA maximum.

Feature Summary

• I2C-compatible serial interface supporting standard and fast modes with pin-selectable addressing
• Automatic cycle interval mode and sequencer operation for efficient data acquisition
• Out-of-range indicator/alert function with programmable high and low limit registers
• Low power consumption with automatic shutdown between conversions

Applications

• Battery-powered instrumentation systems requiring low power and I2C connectivity
• Industrial process control and monitoring applications
• Portable medical devices and handheld measurement tools
• Data acquisition systems with multiple single-ended sensor inputs

Procurement Notes

Verify the specific suffix '0' indicates support for standard and fast I2C modes only, excluding high-speed mode. Confirm the reel packaging format matches production requirements. Ensure the B version temperature range (-40°C to +125°C) aligns with the operational environment. Cross-reference the manufacturer's latest datasheet for any updates to electrical characteristics or ordering information.

Selection Notes

Select this component when a 12-bit resolution with four single-ended inputs is required alongside an I2C interface. It is suitable for designs needing pin-selectable addressing to accommodate multiple devices on a single bus. Consider the external reference requirement and the 1 µA shutdown current for battery-operated applications. Verify that the 188 kSPS throughput meets the system's sampling rate needs.

Part Context

This part belongs to the AD7993/AD7994 family of low-power, 10- and 12-bit ADCs. The AD7994 variant specifically provides 12-bit resolution compared to the 10-bit AD7993. Both share the same 16-lead TSSOP package and functional architecture, differing primarily in resolution and dynamic performance specifications such as SNR and THD.

Replacement Considerations

The AD7993BRUZ-0REEL is a compatible alternative offering 10-bit resolution with identical pinout and interface. For higher channel counts, consider the AD7998 series. Ensure substitute parts match the I2C mode requirements and temperature specifications.