AD8620AR

Overview

The AD8620AR is a dual-channel, precision JFET input operational amplifier manufactured by Analog Devices Inc. It features ultralow offset voltage (100 μV maximum), very low input bias current (10 pA maximum), and wide bandwidth (25 MHz gain-bandwidth product). The device operates on dual supplies ranging from ±5 V to ±13 V, consumes approximately 3.0 mA per amplifier, and supports an extended industrial temperature range of −40°C to +125°C.

Feature Summary

• JFET input architecture providing extremely low input bias current across the entire operating temperature range.
• High-speed dynamic performance with fast settling time and high slew rate for precision signal processing.
• Capable of driving large capacitive loads without external compensation while maintaining stability.
• Designed with no phase reversal characteristics when inputs exceed the common-mode voltage range.

Applications

• Photodiode amplifiers
• Automated test equipment (ATE)
• Instrumentation and sensor controls

Procurement Notes

Verify that the ordering suffix 'AR' corresponds to the specific 8-lead SOIC_N package configuration required for your PCB layout. Confirm that the component meets the necessary RoHS compliance standards for your region. Ensure that the supply chain source provides valid traceability documentation for this Analog Devices part number.

Selection Notes

Select the AD8620AR when a dual-channel solution is required alongside the AD8610's single-channel counterpart. This part offers identical electrical specifications but integrates two amplifiers in one package. Consider the narrow 8-lead SOIC footprint constraints and verify thermal dissipation requirements for dense circuit board designs.

Part Context

The AD8620AR belongs to the AD8610/AD8620 family of precision amplifiers utilizing XFCB technology. While the AD8610 provides a single channel, the AD8620 integrates two identical channels within a single 8-lead SOIC_N package. Both share the same low-noise, low-bias JFET input stage optimized for high DC accuracy and AC performance.

Replacement Considerations

The AD8610 serves as the single-channel equivalent within the same family. For direct pin-compatible replacement, verify if the application requires dual channels or can utilize two AD8610 units instead.

FAQ

Does the AD8620AR exhibit phase reversal?

No, the AD8620AR is designed to prevent phase reversal even when one or both inputs are forced beyond their input common-mode voltage range.

What is the maximum capacitive load the AD8620AR can drive?

The AD8620AR is stable with capacitive loads well in excess of 1 nF and can safely drive up to 10 nF when operating with a ±5.0 V supply.