AD7896BRZ

Overview

The AD7896BRZ is a 12-bit successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 2.7 V to 5.5 V supply and features an on-chip track-and-hold amplifier, clock, and serial interface. The device supports a throughput rate of 100 kS/s with an 8 µs conversion time in high-speed mode. Key electrical parameters include a signal-to-noise ratio of 70 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±1 LSB. Typical power consumption is 9 mW, with a maximum of 10.8 mW. It is housed in an 8-lead SOIC package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a 12-bit SAR ADC, track-and-hold amplifier, and internal clock in an 8-lead package.
• Features a high-speed 2-wire serial interface for easy microcontroller connection.
• Includes an automatic power-down mode that activates after conversion to reduce energy usage.
• Uses the VDD input as the reference voltage, eliminating the need for external references.

Applications

• Battery-powered portable instrumentation
• Industrial process control systems
• Data acquisition subsystems

Procurement Notes

Verify the specific suffix 'BRZ' against official Analog Devices documentation to confirm industrial temperature range (-40°C to +85°C) and RoHS compliance status. Ensure the procurement channel provides valid traceability for the SOIC-8 package variant. Cross-reference the manufacturer part number with current datasheet revisions to confirm pinout and electrical specifications remain unchanged.

Selection Notes

Select this component when a compact, low-power 12-bit ADC is required for single-supply applications. It is suitable for designs needing a built-in reference and track-and-hold function to minimize external components. Consider the 100 kHz throughput limit and 8 µs conversion speed for system timing requirements. Evaluate the serial interface compatibility with the target processor's available GPIO or SPI lines.

Part Context

The AD7896 belongs to Analog Devices' family of fast, low-power sampling ADCs. It is designed to replace discrete solutions by integrating multiple functions into a small footprint. The BRZ suffix typically denotes the industrial temperature grade version of the standard AD7896 series, distinguishing it from commercial or extended temperature variants.

Replacement Considerations

Direct replacements within the same package and specification profile should be verified via Analog Devices' cross-reference tools. Alternative parts must match the 12-bit resolution, 100 kS/s throughput, and 8-lead SOIC form factor. Verify pin compatibility if substituting with other SAR ADCs.