AD7896ARZ

Overview

The AD7896ARZ 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, internal clock, and high-speed serial interface. The device supports a throughput rate of 100 kS/s with an 8 µs conversion time in high sampling mode. It utilizes the VDD input as the reference voltage, eliminating the need for external references. Key electrical parameters include a signal-to-noise ratio of 70 dB, ±1 LSB differential nonlinearity, and typical power dissipation of 9 mW.

Feature Summary

• Integrates a 12-bit SAR ADC, track-and-hold amplifier, and serial interface logic within an 8-lead package.
• Operates from a single 2.7 V to 5.5 V supply using VDD as the internal reference source.
• Features a proprietary automatic power-down mode that activates after conversion completion to minimize energy consumption.
• Provides a high-speed 2-wire serial interface compatible with standard microcontrollers and DSP processors.

Applications

• Battery-powered portable instrumentation systems
• Industrial data acquisition subsystems
• Process control monitoring applications

Procurement Notes

Verify the specific suffix ARZ indicates the industrial temperature range (-40°C to +85°C) and SOIC-8 packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure supply chain sources provide valid traceability records for component authenticity.

Selection Notes

Select this component when a compact 12-bit resolution is required with minimal external support circuitry. The integrated reference and track-and-hold simplify board layout compared to discrete solutions. Consider the 100 kHz throughput limit and 8 µs conversion speed against system timing requirements.

Part Context

The AD7896 belongs to the Analog Devices AD7896 family of fast, low-power sampling ADCs. This series offers various temperature grades and package options, including PDIP and SOIC configurations. The AD7896ARZ specifically denotes the industrial grade variant housed in the small outline integrated circuit package.

Replacement Considerations

Direct replacements within the same family include the AD7896ANZ and AD7896JRZ. Verify temperature range compatibility and pinout consistency before substitution.