AD8665ARZ-REEL

Overview

The AD8665ARZ-REEL is a single-channel, precision operational amplifier from the Analog Devices AD866x family. It features rail-to-rail output capability and operates on supply voltages ranging from 5 V to 16 V (single) or ±2.5 V to ±8 V (dual). The device offers a gain bandwidth product of 4 MHz and a slew rate of 3.5 V/μs. Key electrical specifications include a maximum input offset voltage of 2.5 mV, an input bias current of 1 pA, and a voltage noise density of 8 nV/√Hz at 10 kHz. It is housed in an 8-Lead SOIC package and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail output stage provides full signal swing across the operating supply range.
• Unity-gain stable design ensures reliable performance without phase reversal issues.
• Low input bias current minimizes loading effects on high-impedance sensor sources.
• Extended industrial temperature rating supports operation in harsh environments.

Applications

• Sensor amplification
• Photodiode amplification
• ADC driver circuits
• Medical equipment signal conditioning

Procurement Notes

Verify that the ordering suffix matches the required packaging format for automated assembly processes. Confirm the specific part number variant against the manufacturer's official ordering guide to ensure correct pinout and thermal characteristics. Cross-reference the RoHS compliance status with project requirements before finalizing procurement orders.

Selection Notes

Select this component when a single-channel amplifier with rail-to-rail output is required for systems powered by up to 16 V. Consider the 4 MHz bandwidth and low noise profile for applications involving moderate-speed signal processing. Ensure the 8-Lead SOIC package dimensions fit the available PCB footprint constraints.

Part Context

This component belongs to the AD866x series of low-cost, low-noise CMOS amplifiers. The AD8665 specifically denotes the single-channel configuration within this family. Other variants in the series include dual-channel and quad-channel models designed for similar cost-sensitive and precision applications.

Replacement Considerations

Direct functional substitutes within the same package are not explicitly listed in the provided documentation. Designers should evaluate other members of the AD866x family or comparable precision amplifiers based on matching electrical parameters and pin compatibility.

FAQ

Does the AD8665 exhibit output phase reversal during overdrive conditions?

No, the device is unity-gain stable and does not suffer from output phase reversal when inputs exceed the common-mode range.

What is the maximum supply voltage supported by this amplifier?

The absolute maximum supply voltage rating is 18 V, though the recommended operating range extends up to 16 V.