ADA4099-2HRZ-RL7

Overview

The ADA4099-2HRZ-RL7 is a dual-channel, precision operational amplifier from Analog Devices featuring Over-The-Top input capability. It operates with supply voltages ranging from 3.15 V to 50 V and supports an ultrawide common-mode range extending up to +VS + 70 V. The device offers a gain-bandwidth product of 8 MHz and a slew rate of 5.5 V/µs. Key electrical specifications include a maximum input offset voltage of ±40 µV, low noise density of 7 nV/√Hz at 100 Hz, and a shutdown current of 20 µA maximum. It is housed in an 8-lead SOIC package.

Feature Summary

• Over-The-Top input architecture allows signal detection even when biased beyond the positive power supply rail.
• Robust input protection tolerates differential overdrive voltages up to 80 V without damage or phase reversal.
• Low power shutdown mode significantly reduces quiescent consumption for duty-cycled system applications.
• High PSRR and CMRR ensure stable performance across wide supply and common-mode voltage variations.

Applications

• Industrial sensor signal conditioning
• Supply current sensing
• Battery and power supply monitoring
• Front-end amplifiers in abusive environments
• 4 mA to 20 mA transmitters

Procurement Notes

Verify the specific ordering suffix HRZ-RL7 against the manufacturer's official documentation to confirm the reel packaging format and RoHS compliance status. Ensure the H-grade temperature rating matches the environmental requirements of the target application. Cross-reference the datasheet revision to confirm all electrical parameters are current before finalizing procurement.

Selection Notes

Select this component for designs requiring high-voltage tolerance and precision in harsh industrial environments. The dual-channel configuration is suitable for multi-sensor interfaces where space is constrained. Consider the thermal resistance characteristics if operating near the upper limits of the junction temperature range. Verify that the output drive capability meets the load requirements of the downstream circuitry.

Part Context

This part belongs to the ADA4099 family of robust, precision op amps designed for demanding applications. The dual-channel variant provides two independent amplifiers in a single package, optimizing board space compared to using two single-channel devices. The family shares core architectural features like the Over-The-Top input stage and low-noise performance.

Replacement Considerations

Direct replacements within the same family include the ADA4099-1 for single-channel applications or other packages like MSOP/LFCSP if pinout compatibility differs. Verify that any substitute maintains the Over-The-Top input specification and the required supply voltage range.

FAQ

What is the maximum differential input voltage the ADA4099-2 can tolerate?

The inputs can be differentially overdriven up to 80 V without causing damage or inducing parametric degradation.

How does the Over-The-Top feature benefit circuit design?

It allows the amplifier to accurately process signals that exceed the positive supply voltage, simplifying front-end designs in high-side sensing and industrial applications.

Is the ADA4099-2 unity-gain stable?

Yes, the device is unity-gain stable and can drive capacitive loads as large as 100 pF.