AD8691WAUJZ-RL

Overview

The AD8691WAUJZ-RL 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 features a gain bandwidth product of 10 MHz and a slew rate of 5 V/µs. Key electrical characteristics include a typical offset voltage of 400 µV, maximum input bias current of 1 pA, and voltage noise density of 8 nV/√Hz at 1 kHz. The device is qualified for automotive applications and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output capability enables full signal swing in single-supply configurations.
• Very low input bias current minimizes loading effects on high-impedance sensor sources.
• Low noise performance supports precision signal conditioning in sensitive measurement circuits.
• Automotive qualification ensures reliability under demanding environmental conditions.

Applications

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

Procurement Notes

Verify the specific suffix 'W' indicates automotive qualification status as defined in the manufacturer's ordering guide. Confirm that the 'UJ' package designation corresponds to the 5-lead TSOT form factor required for the design. Ensure the reel packaging matches the production volume needs. Cross-reference the RoHS compliance marking with current regulatory standards before finalizing procurement.

Selection Notes

Select this component when a single-channel amplifier with rail-to-rail output is required alongside very low input bias currents. The wide bandwidth and low noise make it suitable for high-speed precision applications. Consider the small TSOT package size if board space is limited near sensors. Verify that the single-supply voltage range aligns with the system power rails.

Part Context

This part belongs to the AD8691/AD8692/AD8694 family of low-cost, low-noise CMOS operational amplifiers. The AD8691 variant provides a single amplifier channel, whereas the AD8692 offers dual channels and the AD8694 provides four. All variants share similar electrical characteristics but differ in channel count and available package options.

Replacement Considerations

The AD8691AUJZ-R2 serves as a commercial grade alternative in the same TSOT package. Other family members like the AD8692 or AD8694 offer multiple channels but require different pinouts. Automotive equivalents are limited to the W-series variants within this specific datasheet.