AD8665ARZ-REEL7

Overview

The AD8665ARZ-REEL7 is a single-channel, precision CMOS 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). Key electrical specifications include a maximum offset voltage of 2.5 mV, a gain-bandwidth product of 4 MHz, and a slew rate of 3.5 V/µs. The device exhibits low input bias current (1 pA max), low noise density (8 nV/√Hz at 10 kHz), and high power supply rejection ratio (115 dB). 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.
• Low input bias current minimizes errors when interfacing with high-impedance sensors.
• Unity-gain stable design ensures reliable performance in buffer configurations without oscillation risks.

Applications

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

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the specific reel packaging configuration required for automated assembly processes. Confirm the component matches the 8-Lead SOIC_N physical outline dimensions specified in the datasheet. Ensure the procurement documentation explicitly states compliance with RoHS standards as indicated by the Z suffix in the part number.

Selection Notes

Select this component when a single-channel amplifier with rail-to-rail output is required for cost-sensitive applications typically utilizing JFET amplifiers. Consider the 4 MHz bandwidth and 3.5 V/µs slew rate for moderate-speed signal processing tasks. Evaluate the 1 pA input bias current suitability for high-impedance source interfaces compared to higher-bias alternatives.

Part Context

This component belongs to the AD866x family of single-supply, rail-to-rail output amplifiers designed for extended operating ranges up to 16 V. The family includes dual-channel (AD8666) and quad-channel (AD8668) variants sharing similar architectural characteristics. The AD8665 specifically addresses requirements for low noise and low offset in single-channel designs.

Replacement Considerations

The AD8666ARZ-REEL7 serves as a dual-channel equivalent within the same family. The AD8668ARZ-REEL7 offers a quad-channel configuration. Designers requiring automotive qualification should consider the AD8666WARZ-R7 or AD8668WARZ-R7 models instead.