AD8691AKSZ-REEL

Overview

The AD8691AKSZ-REEL7 is a single-channel, low-cost, low-noise CMOS operational amplifier with rail-to-rail output. It operates on a single supply voltage ranging from 2.7 V to 6 V and is qualified for automotive applications. The device features a typical offset voltage of 400 µV, maximum input bias current of 1 pA, and a gain-bandwidth product of 10 MHz. It is housed in a 5-lead SC70 package and specified over an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output capability for maximizing dynamic range in single-supply systems
• Very low input bias current suitable for high-impedance sensor interfaces
• Low noise density and wide bandwidth for precision signal processing
• Automotive qualification for reliable operation in demanding environments

Applications

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

Procurement Notes

Verify the specific ordering suffix matches the required reel quantity and packaging format. Confirm that the component meets RoHS compliance standards as indicated by the 'Z' suffix. Ensure the automotive grade designation aligns with project reliability requirements. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity before procurement.

Selection Notes

Select this component when a single-channel amplifier with rail-to-rail output is required in a compact surface-mount footprint. The low input bias current makes it appropriate for interfacing with high-impedance sources. Consider the 10 MHz bandwidth and low noise characteristics for applications requiring precise signal conditioning within a limited power budget.

Part Context

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

Replacement Considerations

Direct substitutes include other ADI single-channel amplifiers from the same series, such as the AD8691AUJZ or AD8691WAUJZ, which offer identical functionality in different packages or automotive grades. Verify pin compatibility and thermal resistance specifications when transitioning between package types like TSOT and SC70.

FAQ

What is the input voltage range of the AD8691AKSZ-REEL7?

The input voltage range extends from the negative supply rail (VSS) up to approximately 300 mV below the positive supply rail (VDD), allowing for near-rail-to-rail common-mode operation.

Is the AD8691AKSZ-REEL7 unity-gain stable?

Yes, the AD8691 is unity-gain stable, making it suitable for use as a voltage follower without risk of oscillation.

What is the maximum short-circuit current for this amplifier?

The amplifier includes internal short-circuit protection, limiting the output current to approximately ±80 mA under normal operating conditions at 5 V supply.