AD8666ARZ-REEL

Overview

The AD8666ARZ-REEL is a dual-channel, low-cost, low-noise operational amplifier with rail-to-rail output capability. It operates on single supplies from 5 V to 16 V or dual supplies from ±2.5 V to ±8 V. Key electrical specifications include a maximum offset voltage of 2.5 mV, a maximum input bias current of 1 pA, and a gain-bandwidth product of 4 MHz. The device provides a slew rate of 3.5 V/µs and exhibits an input voltage noise density of 8 nV/√Hz at 10 kHz. It is unity-gain stable and functions within an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• Features rail-to-rail output swing for maximizing dynamic range in low-voltage applications.
• Provides low input bias current suitable for high-impedance sensor interfacing.
• Delivers low noise performance optimized for precision signal conditioning.
• Ensures stability without phase reversal when inputs exceed the supply rails.

Applications

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

Procurement Notes

Verify that the specific suffix 'REEL' corresponds to the required tape-and-reel packaging format rather than tube packaging. Confirm the RoHS compliance status indicated by the 'Z' suffix aligns with environmental regulations. Ensure the automotive qualification suffix 'W' is not required if the application demands AEC-Q100 certification, as the standard ARZ variant does not carry this designation.

Selection Notes

Select this component when a dual-channel configuration is necessary alongside rail-to-rail output requirements. 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 against source impedance limitations to minimize DC errors. Compare against the AD8661 family if lower offset voltage specifications are critical for the design.

Part Context

This part belongs to the AD866x family of single-supply, rail-to-rail output amplifiers designed for cost-sensitive applications. The family includes single (AD8665), dual (AD8666), and quad (AD8668) channel variants sharing similar electrical characteristics. The AD8666ARZ-REEL specifically denotes the dual-channel version packaged in an 8-Lead SOIC_N format supplied in a reel configuration.

Replacement Considerations

The AD8666ARMZ serves as a pin-compatible alternative utilizing an 8-Lead MSOP package instead of the SOIC_N form factor. Designers requiring automotive reliability should consider the AD8666WARZ-R7 model, which meets specific quality standards for automotive environments while maintaining identical electrical performance.