AD8665ARZ

Overview

The AD8665ARZ is a single-channel, unity-gain stable CMOS operational amplifier from the AD866x family. It operates on a single supply of 5 V to 16 V or dual supplies of ±2.5 V to ±8 V. The device features rail-to-rail output capability and low noise performance with a voltage noise density of 8 nV/√Hz at 10 kHz. Key electrical specifications include a maximum input offset voltage of 2.5 mV, a gain-bandwidth product of 4 MHz, and a slew rate of 3.5 V/μs. It maintains an input bias current as low as 1 pA and functions reliably 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.
• Low input bias current minimizes loading effects on high-impedance sensor circuits.
• Unity-gain stability ensures reliable operation in direct feedback configurations without oscillation risks.

Applications

• Sensor amplification
• Photodiode amplification
• ADC driver circuits

Procurement Notes

Verify that the component matches the specific package type and marking code required for your assembly process. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement. Ensure the ordering suffix aligns with the desired packaging format for production integration.

Selection Notes

Select this model when a single-channel amplifier with rail-to-rail output is required. Consider the AD8661/AD8662 families if lower offset voltage specifications are necessary for the application. Verify that the 4 MHz bandwidth meets the system's frequency response requirements.

Part Context

This component belongs to the AD866x series of precision amplifiers designed for cost-sensitive applications requiring JFET-like input characteristics. The series includes dual-channel (AD8666) and quad-channel (AD8668) variants sharing similar electrical profiles. The ARZ designation indicates a commercial grade part housed in an 8-Lead SOIC_N package.

Replacement Considerations

The AD8665ARJZ serves as a pin-compatible alternative utilizing a 5-Lead SOT-23 package instead of the standard 8-Lead SOIC form factor.