AD8651AR

Overview

The AD8651AR is a single-channel, precision, low distortion, and low noise CMOS operational amplifier manufactured by Analog Devices. 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 utilizes DigiTrim technology for post-package trimming across the entire common-mode range.

Feature Summary

• Rail-to-rail input and output swing capability extending to both positive and negative supply rails.
• DigiTrim in-package trimming technology corrects offset voltage over the entire common-mode range.
• Low input bias current of 1 pA with high common-mode rejection ratio (CMRR).
• High open-loop gain typically reaching 115 dB with low total harmonic distortion plus noise.

Applications

• Optical communications systems
• Laser source drivers and controllers
• Broadband communications interfaces
• Video line drivers

Procurement Notes

Verify the specific package marking and date code against the manufacturer's ordering guide to ensure authenticity. Confirm that the component matches the Rev. D datasheet specifications. Check for physical damage to the leads or package integrity before integration into the circuit design.

Selection Notes

Select this component when single-supply operation between 2.7 V and 5.5 V is required alongside rail-to-rail signal handling. It is suitable for applications demanding low noise and high precision offset performance without phase reversal issues. Consider the MSOP or SOIC_N packaging options based on available board space constraints.

Part Context

The AD8651AR belongs to the AD865x family of precision CMOS amplifiers, which also includes the dual-channel AD8652. These devices are designed for high-speed, low-noise applications requiring precise signal conditioning. The 'AR' suffix indicates the specific surface-mount package variant offered by Analog Devices.

Replacement Considerations

Consult official documentation for direct substitutes. No verified public substitute part numbers are confirmed in the provided source material.

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 with ESD diodes to either power supply, capable of withstanding up to 4000 V ESD events (human body model).