AD8620ARZ-REEL

Overview

The AD8620ARZ-REEL is a dual-channel precision JFET operational amplifier manufactured by Analog Devices. It features a maximum input offset voltage of 100 μV, a gain bandwidth product of 25 MHz, and a typical slew rate of 50 V/μs. The device operates on dual supplies ranging from ±5 V to ±13 V with a supply current of approximately 3.0 mA per amplifier. It exhibits low noise characteristics, including 6 nV/√Hz voltage noise density and 5 fA/√Hz current noise density. The component is designed for high-speed settling, reaching 0.01% accuracy in under 600 ns, and maintains stability with capacitive loads exceeding 1000 pF.

Feature Summary

• JFET input architecture providing ultralow bias current and drift across the operating temperature range
• High output drive capability allowing stable operation with large capacitive loads without external compensation
• Unconditional unity gain stability with no phase reversal when inputs exceed common-mode voltage limits

Applications

• Photodiode amplifiers
• Automated test equipment (ATE) signal conditioning
• Medical instrumentation such as CAT, MRI, and ultrasound systems
• Fast precision integrator circuits
• High-performance audio applications

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the specific grade designation matches the required offset voltage specifications. Ensure the package type aligns with the PCB footprint design constraints. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and revision status before finalizing procurement orders.

Selection Notes

Select this component for designs requiring high precision combined with wide bandwidth and fast transient response. The dual-channel configuration reduces board space compared to single-channel alternatives. Consider the extended industrial temperature range for environments lacking active cooling. Evaluate the low input bias current requirements against potential PCB leakage currents to maintain signal integrity in high-impedance sensor interfaces.

Part Context

This device belongs to the AD8610/AD8620 family of very low noise, low input bias current, wide bandwidth JFET operational amplifiers. The AD8620 variant specifically provides two independent amplifier channels within an 8-lead SOIC_N package. The family utilizes XFCB process technology to achieve performance metrics typically associated with bipolar amplifiers while maintaining JFET input advantages.

Replacement Considerations

The AD8610 serves as the single-channel counterpart within the same family. Verify pin compatibility and electrical specifications against alternative JFET op-amps if sourcing the original part is not feasible.