ADA4000-2ARZ-R7

Overview

The ADA4000-2ARZ-R7 is a dual-channel, precision JFET input operational amplifier manufactured by Analog Devices Inc. It operates within a supply voltage range of ±4 V to ±18 V and features a maximum offset voltage of 1.70 mV and a maximum bias current of 40 pA. The device provides a gain bandwidth product of 5 MHz and a slew rate of 20 V/µs. It includes unity gain stability, low voltage noise density of 16 nV/√Hz, and an input common-mode voltage range that includes the positive power supply rail.

Feature Summary

• JFET input structure providing high input impedance and very low bias current
• Input common-mode voltage range extends to the positive supply rail for high-side signal conditioning
• Unity gain stable with fast settling time capabilities
• Low voltage noise density suitable for precision applications

Applications

• Reference gain/buffers
• Level shift/driving
• Active filters
• Data acquisition systems
• Sample-and-hold circuits

Procurement Notes

Verify the package option R-8 (8-Lead SOIC_N) matches the design footprint. Confirm the suffix -R7 indicates tape and reel packaging. Ensure the temperature range covers the required operating conditions from -40°C to +125°C. Check RoHS compliance status indicated by the Z suffix. Validate pinout alignment against the specific schematic requirements.

Selection Notes

Select this component when high input impedance and low bias current are critical for signal integrity. The wide common-mode range including the positive rail makes it suitable for single-supply or mixed-rail high-side sensing. Consider the 5 MHz bandwidth and 20 V/µs slew rate for dynamic signal processing needs. Evaluate thermal resistance values if operating near maximum temperature limits.

Part Context

This part belongs to the ADA4000 series of low-cost, precision JFET input operational amplifiers. The series includes single-channel (ADA4000-1), dual-channel (ADA4000-2), and quad-channel (ADA4000-4) variants. The ADA4000-2ARZ-R7 specifically denotes the dual-channel version in an 8-lead SOIC package with reel packaging.

Replacement Considerations

ADA4000-2ARZ

FAQ

Does the input common-mode voltage include the negative supply rail?

No, the input common-mode voltage range includes the positive power supply (+VS) but does not extend to the negative supply rail.

Is the ADA4000-2ARZ-R7 stable at unity gain?

Yes, the device is specified as unity gain stable in both inverting and noninverting configurations.