AD7994BRU-0REEL

Overview

The AD7994BRU-0REEL is a 12-bit, 4-channel successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features an I2C-compatible serial interface and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device provides a typical conversion time of 2 µs with a throughput rate up to 188 kSPS at 5 V. Key specifications include a Signal-to-Noise Ratio (SNR) of 71 dB minimum, integral nonlinearity of ±1 LSB maximum, and differential nonlinearity of +1/–0.9 LSB maximum. It supports standard, fast, and high-speed I2C modes, includes an out-of-range alert function, and operates within a temperature range of −40°C to +125°C.

Feature Summary

• Four single-ended analog input channels with integrated track-and-hold amplifier
• I2C-compatible serial interface supporting standard, fast, and high-speed modes
• Low power consumption with automatic shutdown between conversions
• Configurable out-of-range indicator/alert output function

Applications

• Industrial process control systems requiring multi-channel data acquisition
• Portable instrumentation and battery-powered measurement devices
• Smart transmitters and sensor interfaces
• Environmental monitoring and gas analysis equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and reel specifications. Ensure the component version matches the required I2C address configuration for your system design. Cross-reference the part number with official distributor catalogs to confirm availability and authenticity before placing orders.

Selection Notes

Select this component when a 12-bit resolution with four single-ended inputs is required in a space-constrained design. It is suitable for applications needing low power consumption and simple I2C connectivity. Consider the AD7993 if 10-bit resolution is sufficient, or the AD7998 for eight-channel requirements. Ensure the external reference voltage meets the 1.2 V to VDD range specification.

Part Context

The AD7994 belongs to the AD799x family of low-power, I2C-compatible ADCs from Analog Devices. This family includes variants with different resolutions and channel counts, such as the 10-bit AD7993 and the 8-channel AD7998. These devices share similar architectural features, including SAR conversion techniques and low-power shutdown modes, making them interchangeable in designs where channel count or resolution can be adjusted.

Replacement Considerations

The AD7993BRU-0REEL serves as a compatible alternative offering 10-bit resolution with identical pinout and interface. For higher channel density, the AD7998BRUZ-0 is a direct upgrade path maintaining the I2C interface. Verify that any substitute maintains the required 12-bit accuracy and I2C speed mode compatibility.