AD7894BRZ-10REEL

Overview

The AD7894BRZ-10REEL is a fast, 14-bit successive approximation analog-to-digital converter (ADC) housed in an 8-lead SOIC package. It operates from a single +5 V supply and features a high-speed serial interface with on-chip track/hold amplifier and clock generation. The device supports a bipolar input range of ±10 V and achieves a typical power consumption of 20 mW. Key performance specifications include a maximum conversion time of 5 µs, a signal-to-noise ratio of 77 dB minimum, and a differential nonlinearity of ±1.5 LSB. It includes an automatic power-down mode for low-power applications.

Feature Summary

• Integrated on-chip track/hold amplifier and clock oscillator eliminate external component requirements.
• High-speed two-wire serial interface allows direct connection to microprocessors.
• Automatic power-down mode activates after conversion completion to minimize energy usage.
• Bipolar input scaling enables direct interfacing with ±10 V signals using a single supply.

Applications

• Battery-powered portable instrumentation systems
• Industrial process control data acquisition
• Medical equipment signal conditioning

Procurement Notes

Verify the specific suffix 'REEL' indicates tape-and-reel packaging rather than tube packaging when reviewing distributor listings. Confirm that the 'B' version designation aligns with the required ±1.5 LSB differential nonlinearity specification for your application accuracy needs. Ensure the ordering part number matches the exact voltage range and package type required for your PCB layout.

Selection Notes

Select this component if a 14-bit resolution with ±10 V input range is required in an 8-lead surface-mount package. Compare against the AD7894ARZ-10 variant if tighter linearity specifications are necessary, as the B version offers ±1.5 LSB DNL compared to ±2 LSB for the A version. Consider the AD7894-3 or AD7894-2 variants if unipolar or smaller bipolar input ranges better suit the signal source.

Part Context

This component belongs to the AD7894 family of 14-bit serial ADCs from Analog Devices. It serves as a pin-compatible upgrade to the 12-bit AD7895, offering higher resolution in the same compact footprint. The series is designed for applications requiring space-saving solutions without sacrificing dynamic performance or power efficiency.

Replacement Considerations

The AD7894ARZ-10REEL is a pin-compatible alternative within the same family, differing primarily in linearity specifications. Verify compatibility with existing firmware regarding serial data timing and output coding before substitution.