AD8651ARMZ-REEL

Overview

The AD8651ARMZ-REEL is a single-channel, precision CMOS operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities with a gain bandwidth product of 50 MHz at 5 V 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. It is housed in an 8-lead MSOP package and supports operation within an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes DigiTrim technology for post-package trimming of offset voltage across the entire common-mode range.
• Features true rail-to-rail input and output architecture using parallel NMOS and PMOS differential pairs.
• Provides high open-loop gain and low distortion suitable for precision signal conditioning.
• Includes internal ESD protection diodes on inputs to withstand high-voltage events.

Applications

• Optical communications
• Laser source drivers and controllers
• High-speed ADC and DAC interfaces
• Cell phone power amplifier control

Procurement Notes

Verify that the ordering suffix REEL corresponds to tape-and-reel packaging rather than tube or cut tape formats. Confirm the specific package variant (MSOP) matches the design footprint requirements. Ensure the component grade meets the specified extended industrial temperature range limits for the intended operating environment.

Selection Notes

Select this component when high speed and precision are required in a single-supply system. The rail-to-rail input stage allows full utilization of the supply voltage range without phase reversal issues. Consider the 40 mA output drive capability for driving moderate loads directly. Evaluate the low input bias current for applications involving high-impedance sources like photodiodes.

Part Context

This part belongs to the AD865x family of amplifiers, which also includes dual-channel variants such as the AD8652. The family shares identical electrical characteristics and pinouts but differs in channel count. The AD8651 specifically provides a single amplifier in a compact surface-mount package, distinguishing it from wider packages used for quad-channel devices.

Replacement Considerations

The AD8652 serves as the dual-channel equivalent within the same family. Verify pin compatibility if substituting with other rail-to-rail CMOS amplifiers, noting differences in offset voltage specifications and supply current consumption.