AD8694ARZ

Overview

The AD8694ARZ is a quad, low-cost, CMOS operational amplifier featuring rail-to-rail output and single-supply operation from 2.7 V to 6 V. It offers a 10 MHz gain bandwidth product, 5 V/µs slew rate, and 8 nV/√Hz voltage noise density. The device provides a typical offset voltage of 400 µV with a maximum drift of 6 µV/°C and input bias currents as low as 1 pA. Designed for the extended industrial temperature range of −40°C to +125°C, it is housed in a 14-lead narrow SOIC package.

Feature Summary

• Rail-to-rail output capability enables full signal swing across the supply range.
• CMOS architecture ensures very low input bias currents and low current noise.
• Unity-gain stable design supports direct integration into feedback loops without compensation components.
• Low distortion characteristics benefit high-fidelity audio and precision AC applications.

Applications

• Photodiode amplification
• Battery-powered instrumentation
• Medical instruments
• Multipole filters
• Portable audio devices

Procurement Notes

Verify that the ordering suffix matches the required package type, as the AD8694 series includes variants such as TSSOP (AD8694ARUZ) alongside the standard SOIC. Confirm RoHS compliance status if environmental regulations apply to the specific manufacturing lot. Ensure the selected variant aligns with the intended PCB footprint and thermal management requirements for the target application environment.

Selection Notes

Select this component when multiple channels are required within a single integrated circuit to minimize board space. The combination of low offset voltage and wide bandwidth makes it suitable for precision sensor interfaces. Consider the 14-lead narrow SOIC package dimensions during layout planning to ensure adequate clearance and soldering compatibility with automated assembly processes.

Part Context

This part belongs to the AD869x family of low-cost, low-noise CMOS operational amplifiers manufactured by Analog Devices. The family includes single-channel (AD8691), dual-channel (AD8692), and quad-channel (AD8694) configurations sharing identical electrical specifications. The AD8694ARZ specifically denotes the commercial grade quad version in a 14-lead narrow SOIC package.

Replacement Considerations

Direct functional substitutes include other quad rail-to-rail CMOS op-amps with comparable bandwidth and noise profiles. Verify pinout compatibility before substitution, as pin assignments may differ between manufacturers. Automotive-grade equivalents exist within the same family (e.g., AD8694W) but require separate qualification review.