ADA4084-2ACPZ-R7

Overview

The ADA4084-2ACPZ-R7 is a dual-channel, low noise, rail-to-rail input/output operational amplifier manufactured by Analog Devices Inc. It operates from a single supply of +3 V to +30 V or dual supplies of ±1.5 V to ±15 V. The device features a typical gain bandwidth product of 15.9 MHz and a unity-gain crossover frequency of 9.9 MHz. It exhibits a typical voltage noise density of 3.9 nV/√Hz at 1 kHz and a maximum offset voltage of 200 µV in the LFCSP package. The amplifier draws a typical supply current of 0.625 mA per channel at ±15 V 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.
• Combines low power consumption with high precision, offering low offset voltage and low noise performance.
• Provides wide bandwidth and high slew rate suitable for AC and precision DC applications.

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 package type and ordering suffix against the manufacturer's official documentation to ensure compatibility with design requirements. Confirm that the exposed pad connection requirements for the LFCSP package are met in the PCB layout. Check for any recent revision history updates that may affect specifications or pin configurations before finalizing procurement.

Selection Notes

Select this component for applications requiring both high bandwidth and low noise in a low-power form factor. The rail-to-rail I/O capability makes it suitable for single-supply designs where signal swing must utilize the full supply range. Ensure the thermal management strategy accounts for the junction-to-ambient resistance characteristics of the chosen package variant.

Part Context

This part belongs to the ADA4084 series, which includes single (ADA4084-1), dual (ADA4084-2), and quad (ADA4084-4) variants. The series is designed for high-voltage, low-noise applications. The dual configuration offers two independent amplifiers in a compact surface-mount package, sharing common power supplies and ground connections.

Replacement Considerations

Direct replacements within the same family include the ADA4084-1 and ADA4084-4 for different channel counts. Other packages for the dual variant include the 8-Lead SOIC and 8-Lead MSOP. Verify pinout compatibility and thermal characteristics when substituting package types.

FAQ

What is the recommended connection for the exposed pad in the LFCSP package?

For the 8-Lead LFCSP package, the exposed pad must be connected to the negative supply voltage (V–).

Is the ADA4084-2 unity-gain stable?

Yes, the ADA4084-2 is guaranteed to be unity-gain stable.