ADA4084-2ARZ-R7

Overview

The ADA4084-2ARZ-R7 is a dual-channel, low-noise operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail input and output capabilities, supporting single-supply operation from +3 V to +30 V or dual supplies of ±1.5 V to ±15 V. The device offers a typical gain bandwidth product of 15.9 MHz and a slew rate of 4.6 V/µs at ±15 V. Key electrical characteristics include a maximum offset voltage of 100 µV (SOIC package) and a typical voltage noise density of 3.9 nV/√Hz at 1 kHz. It operates within an industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail input and output functionality enables full signal swing in single-supply systems.
• Low power consumption with typical supply current of 0.625 mA per amplifier at ±15 V.
• High precision performance characterized by low offset voltage and low noise density.
• Unity-gain stable design suitable for direct feedback configurations.

Applications

• Battery-powered instrumentation
• High-side and low-side sensing
• Power supply control and protection
• Telecommunications equipment
• Analog-to-digital converter (ADC) input buffers

Procurement Notes

Verify the specific ordering suffix 'R7' corresponds to the reel packaging format required for automated assembly processes. Confirm that the SOIC-8 package variant matches the thermal and footprint specifications of the target PCB design. Ensure compliance with RoHS directives as indicated in the manufacturer's documentation before final procurement integration.

Selection Notes

Select this component when both high bandwidth and low noise are required in a single-supply environment. The rail-to-rail I/O capability makes it suitable for applications where maximizing dynamic range is critical. Consider the 100 µV maximum offset voltage for precision DC applications. Evaluate the 0.625 mA supply current against battery life requirements for portable devices.

Part Context

This part belongs to the ADA4084 series, which includes single (ADA4084-1), dual (ADA4084-2), and quad (ADA4084-4) amplifier variants. All members share similar electrical characteristics but differ in channel count and package options. The series is designed for high-voltage, low-noise applications requiring precision amplification across the industrial temperature range.

Replacement Considerations

Direct pin-compatible replacements within the same family include ADA4084-2ARMZ (MSOP package) and ADA4084-2ACPJZ (LFCSP package). Verify package dimensions and thermal resistance differences when substituting between SOIC, MSOP, and LFCSP form factors.