AD8651ARMZ-R2

Overview

The AD8651ARMZ-R2 is a single-channel, precision, low-noise CMOS operational amplifier from Analog Devices. It features a 50 MHz gain bandwidth product and a typical input offset voltage of 100 μV. The device operates on a single supply ranging from 2.7 V to 5.5 V and supports rail-to-rail input and output swing. Key electrical parameters include a slew rate of 41 V/μs, an input bias current of 1 pA, and a voltage noise density of 4.5 nV/√Hz. It utilizes DigiTrim technology for in-package trimming across the entire common-mode range.

Feature Summary

• Features DigiTrim in-package trimming technology that measures and corrects offset voltage over the entire input common-mode range.
• Supports true rail-to-rail input and output operation within the power supply rails.
• Provides high-speed performance with a 50 MHz gain bandwidth product and 41 V/μs slew rate.
• Delivers low noise characteristics with a voltage noise density of 4.5 nV/√Hz.

Applications

• Optical communications
• Laser source drivers/controllers
• Broadband communications
• High speed ADCs and DACs
• Video line drivers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and reel specifications. Ensure the component matches the required temperature range and pinout configuration for your circuit design. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and revision level before procurement.

Selection Notes

Select this component when high precision and low noise are required in single-supply applications. The rail-to-rail capability maximizes dynamic range in low-voltage systems. Consider the extended industrial temperature range and the specific packaging options available for space-constrained designs.

Part Context

This component belongs to the AD865x family of precision amplifiers, which includes dual-channel variants like the AD8652. The family shares core architectural features such as iCMOS processing and DigiTrim calibration. These devices are designed for applications demanding high accuracy and fast signal processing in compact form factors.

Replacement Considerations

The AD8652 serves as the dual-channel counterpart within the same family. Verify pin compatibility and channel count requirements when substituting. Ensure that any alternative component maintains similar rail-to-rail input/output specifications and noise performance levels.

FAQ

How does the AD8651 handle input voltages beyond the supply rails?

The inputs are protected by ESD diodes to either power supply. Excess input voltage energizes internal PN junctions, allowing current to flow to the supplies. Input current should be limited to 10 mA using a series resistor if voltages exceed the rails.

What is the purpose of DigiTrim technology in this amplifier?

DigiTrim technology performs post-package trimming to correct offset voltage caused by mechanical stresses during assembly. It ensures precision across the entire common-mode voltage range and temperature spectrum.