AD7994BRU-1

Overview

The AD7994BRU-1 is a 4-channel, 12-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 supply and achieves a throughput rate of up to 188 kSPS with a typical conversion time of 2 µs. The device includes four single-ended analog input channels, an internal track-and-hold amplifier, and supports standard, fast, and high-speed I2C modes. It offers pin-selectable addressing via the AS pin, automatic shutdown mode consuming 1 µA max, and an out-of-range alert function.

Feature Summary

• I2C-compatible serial interface supporting standard, fast, and high-speed modes for flexible system integration
• Pin-selectable addressing allows multiple devices to share the same serial bus without external logic
• Automatic cycle interval mode and command mode enable efficient power management through automatic shutdown
• Integrated limit registers provide hardware-based out-of-range detection with an open-drain alert output

Applications

• Battery-powered instrumentation systems requiring low power consumption
• Industrial process control monitoring with multiple single-ended sensor inputs
• Data acquisition systems utilizing I2C communication buses
• Portable medical devices needing high-resolution ADCs with minimal footprint

Procurement Notes

Verify the specific ordering suffix matches the required I2C speed mode and address configuration. Confirm package type and temperature range align with design specifications. Ensure reference documentation is current as Analog Devices may update datasheets without notice. Check for RoHS compliance status if required by regional regulations.

Selection Notes

Select this component when four single-ended channels are needed with 12-bit resolution. Choose the -1 suffix variant specifically for applications requiring high-speed I2C operation up to 3.4 MHz. Consider the AD7993 if 10-bit resolution is sufficient for lower cost requirements. Evaluate power consumption needs against the available shutdown and operating modes.

Part Context

This part belongs to the AD7993/AD7994 family of low-power, multi-channel ADCs. It shares functional similarities with the AD7998 (8-channel) and AD7992 (2-channel) variants. The -1 suffix distinguishes it from the -0 version by enabling high-speed I2C mode support. It complements higher-resolution PulSAR ADCs like the AD7984 in broader product portfolios.

Replacement Considerations

The AD7994BRU-0Z serves as a direct functional substitute but lacks high-speed I2C mode support. The AD7993 series offers identical pinouts and functionality with reduced 10-bit resolution. Verify I2C timing compatibility when substituting between -0 and -1 suffixes.