AD8682ARZ

Overview

The AD8682ARZ is a dual low power, high speed JFET operational amplifier manufactured by Analog Devices Inc. It operates within a supply voltage range of ±4.5 V to ±18 V and functions across an operating temperature range of -40°C to +85°C. Key electrical specifications include a typical gain bandwidth product of 3.5 MHz, a slew rate of 9 V/μs, and a maximum input offset voltage of 1 mV at 25°C. The device draws a supply current of 210 μA per amplifier with a maximum of 250 μA. Input bias current is typically 20 pA, rising to 125 pA over the full temperature range. The component utilizes an 8-lead SOIC_N package.

Feature Summary

• JFET input stage ensures extremely low input bias current for high source impedance applications
• Unity-gain stable design allows for direct buffering without external compensation
• High slew rate combined with low quiescent current optimizes performance in battery-powered systems
• Common-mode input voltage range extends to the positive supply rail

Applications

• Portable telecommunications equipment
• Low power industrial instrumentation
• Active and precision filters
• Strain gauge amplifiers
• Supply current monitoring circuits

Procurement Notes

Verify that the ordering suffix matches the required package type, as the 'RZ' designation indicates RoHS compliance and the specific lead form. Confirm the revision level against the manufacturer's documentation to ensure compatibility with existing designs. Check for any recent Product Change Notices regarding material or manufacturing site updates before finalizing procurement orders.

Selection Notes

Select this component when a balance between low power consumption and high-speed signal processing is required. The JFET input architecture makes it suitable for circuits driving high-impedance sources where bias current errors must be minimized. Ensure the application does not require shutdown functionality, as this model lacks that feature. Verify that the output swing requirements align with the specified load conditions.

Part Context

This part belongs to the AD8682/AD8684 family of low power, high speed JFET operational amplifiers. The AD8682 variant specifically provides two independent amplifiers in a single package, whereas the AD8684 offers four. Both share identical electrical characteristics but differ in channel count and pinout configuration to accommodate their respective package styles.

Replacement Considerations

The AD8682ARMZ serves as a functional replacement offering the same electrical specifications in an 8-lead MSOP package instead of the SOIC_N format.