AD8651ARM-R2

Overview

The AD8651ARM-R2 is a single-channel, precision CMOS operational amplifier from the Analog Devices AD865x family. It features a gain bandwidth product of 50 MHz and a slew rate of 41 V/µs. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V. Key electrical specifications include a typical input offset voltage of 100 µV, an input bias current of 1 pA, and a voltage noise density of 4.5 nV/√Hz at 100 kHz. It provides rail-to-rail input and output swing capabilities.

Feature Summary

• Utilizes DigiTrim in-package trimming technology to correct offset voltage across the entire common-mode range.
• Features true rail-to-rail input and output architecture for maximum dynamic range.
• Provides high open-loop gain with low distortion characteristics suitable for precision applications.

Applications

• Optical communications systems
• Laser source drivers and controllers
• Broadband communications interfaces
• High-speed ADC and DAC buffer circuits

Procurement Notes

Verify that the ordering suffix R2 corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm that the component meets all RoHS compliance standards mandated by the target manufacturing region. Ensure the selected package variant matches the footprint constraints of the printed circuit board design.

Selection Notes

Select this component when high speed and precision are required within a single-supply environment. The rail-to-rail input stage allows operation near ground potential, while the output swing capability maximizes signal utilization. Consider the low input bias current for high-impedance sensor interfaces and the low noise profile for sensitive signal conditioning tasks.

Part Context

This part belongs to the AD865x family of amplifiers, which includes dual-channel variants such as the AD8652. The family shares identical electrical performance characteristics but differs in channel count and pinout configurations. The AD8651 specifically denotes the single-channel version of this high-performance CMOS amplifier series.

Replacement Considerations

Direct functional equivalents within the same family include the AD8652 for dual-channel requirements. Verify pin compatibility if substituting with other rail-to-rail CMOS amplifiers, as input protection and bias current characteristics may differ significantly between manufacturers.

FAQ

Does the AD8651 exhibit phase reversal?

No, the AD8651 does not exhibit phase reversal for common-mode voltages within the power supply range.

What is the input protection mechanism?

The inputs are protected by ESD diodes to either power supply, capable of withstanding up to 4000 V human body model events without degradation.