AD8651ARMZ

Overview

The AD8651ARMZ is a single-channel, precision, low noise CMOS operational amplifier manufactured by Analog Devices Inc. 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. It offers rail-to-rail input and output swing capabilities with a typical offset voltage of 100 µV and a voltage noise density of 4.5 nV/√Hz at 100 kHz. The component utilizes DigiTrim technology for in-package trimming across the entire common-mode range.

Feature Summary

• Features true rail-to-rail input and output architecture utilizing parallel NMOS and PMOS differential pairs for maximum dynamic range.
• Incorporates DigiTrim in-package trimming technology to correct offset voltage over the full common-mode input range.
• Provides high-speed performance with a 50 MHz gain bandwidth product and 41 V/µs slew rate.
• Delivers ultra-low input bias current in the picoampere range suitable for sensitive signal conditioning.

Applications

• Optical communications systems
• Laser source drivers and controllers
• Broadband communication interfaces
• High speed analog-to-digital and digital-to-analog converters
• Video line drivers

Procurement Notes

Verify the specific package variant against the ordering guide, as the AD8651 family includes both MSOP and SOIC_N options. Confirm that the selected part number matches the required channel count and temperature specifications. Ensure compatibility with the intended power supply voltage range of 2.7 V to 5.5 V before finalizing procurement.

Selection Notes

Select this component for applications requiring high precision combined with high-speed signal processing. The rail-to-rail input stage allows operation near supply rails, making it ideal for low-voltage single-supply designs. Consider the low noise characteristics for preamplifier stages in photodiode applications where signal integrity is critical.

Part Context

This component belongs to the AD865x family of precision amplifiers, which also includes the dual-channel AD8652. The family is characterized by its use of advanced CMOS processes and proprietary DigiTrim technology. These devices are designed to bridge the gap between standard CMOS op amps and higher-cost JFET or bipolar precision amplifiers.

Replacement Considerations

The AD8652 serves as the dual-channel counterpart within the same family. Verify pinout compatibility if substituting with other rail-to-rail amplifiers, as input protection and bias current characteristics may differ significantly.

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.