ADA4665-2ARZ

Overview

The ADA4665-2ARZ is a dual-channel CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates on single supplies from 5 V to 16 V or dual supplies of ±2.5 V to ±8 V. Key electrical parameters include a typical gain bandwidth product of 1.2 MHz, a slew rate of 1 V/µs, and a maximum supply current of 400 µA per amplifier at 25°C. The device maintains an input bias current of 1 pA maximum and exhibits an offset voltage drift of 3 µV/°C across the industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail input and output swing capability for maximizing dynamic signal range
• Low power consumption optimized for high-voltage budget designs
• Very low input bias current suitable for high-impedance sensor interfaces

Applications

• Portable systems with strict power constraints
• Medical equipment and physiological measurement circuits
• Current shunt sensors for feedback control and power metering
• Active filters requiring unity-gain stability

Procurement Notes

Verify the package type matches the design requirements, as the component is available in both 8-Lead SOIC_N and 8-Lead MSOP configurations. Confirm RoHS compliance status indicated by the Z suffix. Ensure the selected variant aligns with the specific thermal and mechanical constraints of the target PCB layout before finalizing procurement.

Selection Notes

Select this component when designing circuits that require wide common-mode voltage ranges near the supply rails without sacrificing precision. The low bias current makes it appropriate for transimpedance amplifiers and high-impedance sensor front ends. Consider the 1.2 MHz bandwidth when determining suitability for active filter applications relative to the desired cutoff frequencies.

Part Context

This part belongs to the Analog Devices ADA4665 family of low-cost, rail-to-rail input/output operational amplifiers. It serves as the dual-channel counterpart within the series, complementing single-channel variants like the AD8541 and quad-channel versions such as the AD8544. The architecture focuses on balancing low power dissipation with sufficient bandwidth for general-purpose instrumentation tasks.

Replacement Considerations

Public confirmed substitute part numbers: ADA4666-2ARMZ-RL, ADA4666-2ACPZ-RL.