AD8666ARMZ

Overview

The AD8666ARMZ is a dual-channel, low-cost, rail-to-rail output CMOS operational amplifier manufactured by Analog Devices. It operates on single supplies from 5 V to 16 V or dual supplies of ±2.5 V to ±8 V. 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 draws 1.15 mA per amplifier at 16 V supply. It features low input bias current (1 pA typical) and low noise density (8 nV/√Hz at 10 kHz). The component is housed in an 8-lead MSOP package and functions over an extended temperature range of -40°C to +125°C.

Feature Summary

• Rail-to-rail output capability with unity-gain stability
• Low input bias current and low voltage noise characteristics
• Extended operating supply voltage range up to 16 V

Applications

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

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and RoHS compliance status. Ensure the selected variant matches the required automotive or commercial qualification standards for your application environment. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.

Selection Notes

Select this component when designing systems requiring high input impedance combined with low noise performance. It serves as a cost-effective alternative to JFET amplifiers in applications involving high-impedance sensors. Consider the 4 MHz bandwidth and rail-to-rail output swing when interfacing with ADCs or driving loads near the supply rails.

Part Context

This device belongs to the AD866x family of precision amplifiers designed for general-purpose analog signal processing. The family includes single (AD8665), dual (AD8666), and quad (AD8668) channel variants sharing similar electrical characteristics. The AD8666 specifically provides two independent channels within a compact surface-mount footprint suitable for space-constrained PCB layouts.

Replacement Considerations

The AD8666ARZ offers identical functionality in an 8-Lead SOIC_N package.