AD8684ARZ-REEL7

Overview

The AD8684ARZ-REEL7 is a quad low power, precision JFET operational amplifier from Analog Devices. It features a typical gain bandwidth of 3.5 MHz and a slew rate of 9 V/μs with supply currents under 250 μA per amplifier. The device operates within a supply voltage range of ±4.5 V to ±18 V. Key electrical characteristics include an input offset voltage of 1 mV maximum at 25°C, an input bias current of 20 pA maximum at 25°C, and a common-mode rejection ratio of 90 dB typical. It is unity-gain stable and housed in a 14-Lead SOIC_N package.

Feature Summary

• JFET input stage ensures extremely low input bias current for high source impedance applications
• Optimized for high speed performance while maintaining low quiescent power consumption
• Unity-gain stability allows for reliable operation in buffer configurations and driving capacitive loads
• Wide common-mode input voltage range includes the positive supply rail

Applications

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

Procurement Notes

Verify the specific ordering suffix REEL7 corresponds to the required tape and reel packaging configuration before procurement. Confirm that the RoHS compliant designation (Z) meets environmental standards for the target assembly process. Ensure the 14-Lead SOIC_N package dimensions align with the PCB footprint design rules. Cross-reference the manufacturer part number against the latest datasheet revision to confirm pinout and electrical specifications remain unchanged.

Selection Notes

Select this component when designing battery-powered systems requiring above-average speed without excessive power drain. The JFET input architecture is suitable for interfacing with high-impedance sensors where bias current errors must be minimized. Consider the 3.5 MHz bandwidth and 9 V/μs slew rate for applications demanding fast settling times. Verify that the operating temperature range of -40°C to +85°C covers the intended environmental conditions.

Part Context

This part belongs to the AD8682/AD8684 family of dual and quad low power, high-speed JFET operational amplifiers manufactured by Analog Devices. The AD8684 variant specifically integrates four independent amplifier channels within a single package, offering a compact solution for multi-channel signal conditioning tasks compared to using multiple dual-channel devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.