AD8657ARMZ-R7

Overview

The AD8657ARMZ-R7 is a dual-channel, precision, micropower CMOS operational amplifier featuring rail-to-rail input and output capabilities. It operates from a single supply of 2.7 V to 18 V or dual supplies of ±1.35 V to ±9 V with a maximum quiescent current of 22 μA per amplifier. Key electrical specifications include a maximum input offset voltage of 350 μV, a maximum input bias current of 20 pA, and a gain bandwidth product of 230 kHz at AV = 100. The device provides an open-loop gain of 120 dB and excellent electromagnetic interference immunity.

Feature Summary

• Utilizes patented DigiTrim® trimming technology to achieve low offset voltage and high precision.
• Features rail-to-rail input and output stages for maximum dynamic range in low-voltage applications.
• Offers high immunity to electromagnetic interference (EMI) across multiple frequency bands.

Applications

• Current monitors in process and motor control systems
• 4 mA to 20 mA loop drivers
• Buffer and level shifting circuits
• Multipole filters
• Remote and wireless sensor front ends

Procurement Notes

Verify the specific ordering suffix R7 indicates reel packaging when sourcing this component. Confirm that the manufacturer part number matches the exact pinout and package dimensions required for your PCB layout. Ensure compatibility with your assembly processes regarding moisture sensitivity levels and soldering temperatures defined in the datasheet.

Selection Notes

Select this component for designs requiring low power consumption alongside high precision in wide supply voltage ranges. It is suitable for battery-operated portable systems where minimizing quiescent current is critical. Consider its rail-to-rail performance for maximizing signal swing in single-supply environments compared to standard op-amps.

Part Context

This device belongs to the AD8657/AD8659 family of precision micropower amplifiers. The AD8657 specifically denotes the dual-channel version, while the AD8659 is the quad-channel variant. Both utilize the same core architecture and are available in various packages including MSOP and LFCSP to suit different board space constraints.

Replacement Considerations

Direct functional replacements within the same family include the AD8659 for quad-channel requirements. Other Analog Devices precision CMOS amplifiers may serve as alternatives if pin compatibility and specific electrical parameters like offset voltage and bandwidth align with the design needs.