AD8661ARZ-REEL

Overview

The AD8661ARZ-REEL is a single-channel precision CMOS operational amplifier from Analog Devices, housed in an 8-SOIC surface-mount package. It features DigiTrim technology for high DC accuracy with a maximum input offset voltage of 30 µV and low input bias current of 1 pA. The device operates on a single supply ranging from 5 V to 16 V, consuming 1.4 mA of quiescent current per channel. Key electrical specifications include a gain-bandwidth product of 4 MHz, a slew rate of 3.5 V/µs, and rail-to-rail output capability. It offers a common-mode rejection ratio of 110 dB and power supply rejection ratio of 110 dB, with an input voltage noise density of 12 nV/√Hz.

Feature Summary

• DigiTrim precision technology ensures high DC accuracy with minimal input offset voltage and drift.
• Rail-to-rail output stage allows signal swing close to both supply rails.
• CMOS architecture provides low input bias current and moderate quiescent current consumption.
• Single-supply operation supports flexible power configurations within the specified voltage range.

Applications

• Precision data acquisition systems requiring high DC accuracy
• Battery-powered instrumentation due to moderate power consumption
• Signal conditioning circuits for sensors with low-level outputs
• Active filtering applications in industrial control environments

Procurement Notes

Verify the specific suffix REEL against the manufacturer's official datasheet to confirm packaging type and quantity. Ensure the order matches the exact part number AD8661ARZ-REEL, as variations in suffixes may indicate different tape-and-reel specifications or regional distribution channels. Cross-reference the manufacturer's latest documentation for any updates on RoHS compliance status and availability constraints.

Selection Notes

Select this component when a single-channel op-amp with rail-to-rail output and precision DC characteristics is required. It is suitable for applications needing low input bias current and good CMRR without the complexity of dual-supply systems. Compare performance metrics such as offset voltage and bandwidth against alternative precision amplifiers to ensure compatibility with the target circuit's signal integrity requirements.

Part Context

The AD8661 belongs to the AD866x family of precision amplifiers, which includes dual (AD8662) and quad (AD8664) variants. These devices share similar electrical characteristics and are designed for general-purpose precision applications. The family utilizes CMOS technology combined with laser trimming for enhanced accuracy. The AD8661ARZ-REEL specifically denotes the single-channel version in a reel package format.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD8662ARZ and AD8664ARZ for multi-channel needs. Other precision CMOS op-amps with similar specifications should be evaluated for offset voltage, bandwidth, and supply voltage compatibility before substitution.