ADA4084-2ARMZ

Overview

The ADA4084-2ARMZ is a dual-channel, low-power 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 gain bandwidth product of 15.9 MHz at AV = 100 and a typical unity-gain crossover frequency of 9.9 MHz. It exhibits a maximum offset voltage of 100 µV in the SOIC package and a typical supply current of 0.625 mA per amplifier at ±15 V. The component operates within an industrial temperature range of −40°C to +125°C.

Feature Summary

• Rail-to-rail input and output functionality for extended signal swing capability
• Low power consumption with typical supply current of 0.625 mA per amplifier
• 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 systems
• High-side and low-side sensing circuits
• Power supply control and protection mechanisms
• Digital-to-analog converter (DAC) output amplifiers
• Analog-to-digital converter (ADC) input buffers

Procurement Notes

Verify the specific ordering suffix ARMZ corresponds to the MSOP-8 package variant when sourcing. Confirm that the component meets the required industrial temperature specifications for the intended application environment. Ensure compatibility with the system's supply voltage constraints, as the device supports both single and dual supply configurations up to 30 V total.

Selection Notes

Select this component for applications requiring high precision and wide bandwidth in a compact surface-mount package. The dual configuration allows for cost-effective implementation of differential stages or multi-channel signal conditioning. Consider the thermal resistance characteristics of the MSOP-8 package when designing heat dissipation strategies for dense PCB layouts.

Part Context

This part belongs to the ADA4084 family, which includes single (ADA4084-1), dual (ADA4084-2), and quad (ADA4084-4) variants. All members share identical electrical characteristics but differ in channel count and package options. The series is designed for single-supply applications requiring both AC and precision DC performance, featuring rail-to-rail inputs and outputs.

Replacement Considerations

Direct functional substitutes within the same family include the ADA4084-1 for single-channel needs or the ADA4084-4 for four-channel requirements. Other packages for the dual variant include the 8-lead SOIC (R) and 8-lead LFCSP (CP). Verify pinout compatibility if substituting between different package types.