AD7994BRUZ-1REEL

Overview

The AD7994BRUZ-1REEL 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 supporting standard, fast, and high-speed modes up to 3.4 MHz. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and includes a track-and-hold amplifier capable of handling input frequencies up to 11 MHz. Key specifications include a typical conversion time of 2 µs, a throughput rate of 188 kSPS at 5 V, and a signal-to-noise ratio of 71 dB. It is housed in a 16-lead TSSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• I2C-compatible serial interface with pin-selectable addressing for multiple devices on the same bus
• Automatic shutdown mode to maximize power efficiency during non-conversion periods
• On-chip limit registers with open-drain out-of-range indicator output
• Sequencer operation with automatic cycle interval mode

Applications

• Battery-powered instrumentation systems requiring low power consumption
• Industrial process control applications utilizing I2C communication
• Portable data acquisition systems with multi-channel sensing needs
• Automotive sensor interfaces operating across wide temperature ranges

Procurement Notes

Verify that the ordering suffix matches the required I2C speed capabilities, as the '-1' variant supports high-speed modes unlike the '-0' version. Confirm the reel packaging specification aligns with automated assembly requirements. Ensure the component meets RoHS compliance standards for the specific manufacturing batch. Cross-reference the datasheet revision to validate electrical parameters against current design specifications.

Selection Notes

Select this component when a 12-bit resolution is required alongside I2C connectivity for space-constrained designs. The AD7994 offers higher accuracy than the AD7993 but shares similar power characteristics. Consider the AD7998 if eight channels are needed instead of four. Evaluate the need for high-speed I2C support, which is exclusive to the '-1' suffix variants, to determine compatibility with the host controller's clock frequency limits.

Part Context

This part belongs to the AD7993/AD7994 family of low-power, 4-channel ADCs. It serves as the 12-bit resolution counterpart to the 10-bit AD7993. Both devices share identical pinouts and functional blocks, differing primarily in resolution and dynamic performance metrics. The family is designed for applications requiring minimal external components and efficient multi-device bus integration.

Replacement Considerations

Direct substitutes include the AD7994BRUZ-0REEL, though it lacks high-speed I2C mode support. For eight-channel requirements, consider the AD7998 series. Verify that any replacement maintains the 16-lead TSSOP footprint and compatible I2C addressing schemes to ensure board-level interchangeability without schematic modifications.