AD8620AR-REEL7

Overview

The AD8620AR-REEL7 is a dual-channel, precision JFET input operational amplifier manufactured by Analog Devices. It features a gain bandwidth product of 25 MHz and a slew rate of 50 V/μs to 60 V/μs depending on supply voltage. The device operates within a dual-supply range of ±5 V to ±13 V with a typical supply current of 3.0 mA per amplifier. Key electrical characteristics include a maximum offset voltage of 100 μV, an input bias current of 10 pA maximum, and a voltage noise density of 6 nV/√Hz at 1 kHz.

Feature Summary

• JFET input architecture providing ultralow input bias current across the entire operating temperature range
• High output drive capability capable of sourcing over 60 mA and sinking approximately 95 mA
• Unconditional stability in all gains, including operation with capacitive loads exceeding 1 nF
• No phase reversal when inputs are forced beyond the common-mode voltage range

Applications

• Photodiode amplifiers
• Automated test equipment (ATE) amplification and buffering
• Medical instrumentation such as CAT, MRI, and ultrasound systems
• Fast precision integrators and high-performance filters

Procurement Notes

Verify that the ordering suffix REEL7 corresponds to tape and reel packaging rather than tube packaging. Confirm the package type matches the narrow 8-lead SOIC specification for the AD8620 variant. Ensure the component grade meets the required offset voltage specifications for the intended application.

Selection Notes

Select this component for applications requiring low noise and high precision without the need for rail-to-rail output swing. The wide operating temperature range up to +125°C supports use in systems with limited active cooling. Consider the specific channel count requirements, as the AD8620 provides two channels compared to the single-channel AD8610.

Part Context

The AD8620 is part of the AD8610/AD8620 family of very high precision JFET input amplifiers. Manufactured using the XFCB process, these devices offer superior performance compared to standard JFET amplifiers by maintaining low bias currents at elevated temperatures. The family includes single, dual, and quad configurations to suit various system integration needs.

Replacement Considerations

The AD8610 serves as the single-channel equivalent within the same family. Other dual-channel precision amplifiers may be considered if pin compatibility or specific performance metrics differ from the AD8620 specifications.