AD8691WAUJZ-R7

Overview

The AD8691WAUJZ-R7 is a single-channel, low-cost, low-noise CMOS operational amplifier with rail-to-rail output. It operates on a single supply from 2.7 V to 6 V and is qualified for automotive applications. The device features a gain-bandwidth product of 10 MHz, a slew rate of 5 V/µs, and an input bias current of 1 pA maximum. It has a typical offset voltage of 400 µV and a voltage noise density of 8 nV/√Hz. The component is housed in a 5-lead TSOT package and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output capability allows signal swing close to both supply rails.
• Very low input bias currents minimize loading effects on high-impedance sources.
• Low offset voltage and drift ensure precision in DC-coupled applications.
• Automotive qualification supports use in demanding vehicle environments.

Applications

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

Procurement Notes

Verify the specific ordering suffix R7 indicates reel packaging when sourcing components. Confirm that the W prefix denotes automotive qualification status required for your design specifications. Ensure the TSOT-5 package footprint matches your PCB layout constraints. Check for RoHS compliance documentation as indicated by the Z suffix in the part number.

Selection Notes

Select this amplifier for applications requiring low noise and high speed in a compact surface-mount package. The wide bandwidth and low distortion make it suitable for AC signal processing. Consider the single-supply operation and rail-to-rail output for battery-powered systems. Verify that the input common-mode voltage range meets your circuit requirements relative to the negative supply rail.

Part Context

This component belongs to the AD8691/AD8692/AD8694 family of low-cost, low-noise CMOS operational amplifiers. The family includes single, dual, and quad configurations sharing similar electrical characteristics. The WAUJZ variant specifically refers to the single-channel version in a 5-lead TSOT package with automotive qualification and reel packaging.

Replacement Considerations

Check the AD8691AUJZ-R7 for commercial grade equivalents in the same package. Review the AD8691AKSZ-R7 for SC70 package alternatives. Verify if the AD8692 or AD8694 variants are suitable if additional channels are needed in the design.

FAQ

Is the AD8691WAUJZ-R7 unity-gain stable?

Yes, the datasheet specifies that the amplifier is unity-gain stable.

What is the input common-mode voltage range?

The input common-mode voltage range extends from 0.3 V below the negative supply to 1.6 V above the negative supply at 2.7 V operation, and up to 3.9 V above the negative supply at 5 V operation.

Does the device include a shutdown feature?

No, the AD8691 does not have a shutdown pin or feature; it operates continuously when powered.