ADA4084-1ARZ-RL

Overview

The ADA4084-1ARZ-RL is a single-channel, low-power operational amplifier from Analog Devices. It features rail-to-rail input and output capabilities, operating on a single supply of +3 V to +30 V or dual supplies of ±1.5 V to ±15 V. Key electrical parameters include a gain bandwidth product of 15.9 MHz, a slew rate of 4.6 V/µs, and a maximum offset voltage of 100 µV in the SOIC package. The device draws 0.625 mA typical supply current per amplifier at ±15 V and offers a voltage noise density of 3.9 nV/√Hz at 1 kHz.

Feature Summary

• Rail-to-rail input and output functionality for maximizing dynamic range in single-supply systems.
• Low power consumption with typical supply current of 0.625 mA per amplifier at ±15 V.
• High precision characteristics including low offset voltage (100 µV max) and low noise (3.9 nV/√Hz).
• 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
• DAC output amplifiers

Procurement Notes

Verify the specific ordering suffix ARZ-RL against the manufacturer's official documentation to confirm the tape-and-reel packaging format and RoHS compliance status. Ensure the component matches the exact pinout and thermal specifications required for the target PCB layout. Cross-reference the datasheet revision to confirm all electrical characteristics align with the design requirements before finalizing procurement.

Selection Notes

Select this component for applications requiring both AC signal integrity and DC precision in single-supply environments. The rail-to-rail I/O capability allows for multistage filter designs without signal clipping near the supply rails. Consider the 100 µV maximum offset voltage and 3.9 nV/√Hz noise density for high-fidelity signal conditioning tasks where low distortion is critical.

Part Context

The ADA4084-1 is part of the ADA4084 series, which includes dual (ADA4084-2) and quad (ADA4084-4) variants. This family is designed as high-voltage, low-noise operational amplifiers by Analog Devices. The single-channel version is available in 5-lead SOT-23 and 8-lead SOIC packages, providing flexibility for space-constrained designs while maintaining the series' core performance attributes.

Replacement Considerations

Direct substitutes within the same family include the ADA4084-2 and ADA4084-4 for multi-channel needs. For single-channel replacements, verify compatibility with other Analog Devices rail-to-rail op-amps such as the ADA4004-1 or AD8671, ensuring that gain bandwidth, offset voltage, and package dimensions meet the specific circuit constraints.

FAQ

Is the ADA4084-1 unity-gain stable?

Yes, the ADA4084-1 is specified as unity-gain stable, allowing it to be used directly in buffer configurations without risk of oscillation.

What is the input voltage range of the ADA4084-1?

The ADA4084-1 features rail-to-rail inputs, meaning the common-mode input voltage range extends from the negative supply rail (V–) to the positive supply rail (V+).

Does the ADA4084-1 support operation at low supply voltages?

Yes, 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.