ADA4084-2ARZ

Overview

The ADA4084-2ARZ is a dual-channel, low noise, rail-to-rail input/output operational amplifier from Analog Devices. It operates on single supplies from +3 V to +30 V or dual supplies of ±1.5 V to ±15 V. Key electrical characteristics include a gain bandwidth product of 15.9 MHz, a typical supply current of 0.625 mA per amplifier at ±15 V, and a voltage noise density of 3.9 nV/√Hz at 1 kHz. The device features a maximum offset voltage of 100 µV in the SOIC package and is specified over an industrial temperature range of −40°C to +125°C.

Feature Summary

• Features rail-to-rail input and output capabilities for maximizing dynamic range in single-supply systems.
• Delivers low power consumption with a typical supply current of 0.625 mA per amplifier at ±15 V.
• Provides high precision with low offset voltage and low noise density suitable for signal conditioning.

Applications

• Battery-powered instrumentation
• High-side and low-side sensing
• Power supply control and protection
• Digital-to-analog converter (DAC) output amplifiers
• Analog-to-digital converter (ADC) input buffers

Procurement Notes

Verify the specific package variant, as the ARZ suffix denotes the 8-lead SOIC package. Confirm that the required channel count matches the dual configuration of this part number. Ensure the operating environment stays within the specified industrial temperature range and supply voltage limits defined in the datasheet specifications.

Selection Notes

Select this component when both AC and precision DC performance are required in single-supply applications. It is suitable for designs needing wide bandwidth combined with low noise and low power consumption. Consider the 8-lead SOIC package constraints regarding thermal resistance and board space compared to other available packages like MSOP or LFCSP.

Part Context

This device belongs to the ADA4084 series, which includes single (ADA4084-1), dual (ADA4084-2), and quad (ADA4084-4) 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 rail-to-rail operation.

Replacement Considerations

Direct functional replacements within the same family include the ADA4084-1 (single channel) and ADA4084-4 (quad channel). Other packages for the dual channel version include ADA4084-2ARMZ (MSOP) and ADA4084-2ACPZ (LFCSP). Verify pin compatibility and thermal requirements when substituting.

FAQ

What is the maximum supply voltage for the ADA4084-2ARZ?

The device is guaranteed to operate from +3 V to +30 V on a single supply, or ±1.5 V to ±15 V on dual supplies.

Does the ADA4084-2ARZ support unity-gain stability?

Yes, the amplifier is unity-gain stable, allowing it to be used in voltage follower configurations without risk of oscillation.