ADA4099-1HUJZ-RL7

Overview

The ADA4099-1HUJZ-RL7 is a single-channel, robust, precision operational amplifier manufactured by Analog Devices Inc. It features Over-The-Top operation with an ultrawide common-mode range extending from −VS to +VS and beyond, up to 70 V. The device supports a wide power supply voltage range of 3.15 V to 50 V and delivers a gain-bandwidth product of 8 MHz with a slew rate of 5.5 V/µs. Key electrical characteristics include a maximum input offset voltage of ±40 µV, low voltage noise of 7 nV/√Hz, and a shutdown current of 20 µA maximum. It operates within a temperature range of −55°C to +150°C.

Feature Summary

• Over-The-Top capability allows signal detection even when inputs are biased beyond the positive supply rail.
• Robust design includes phase reversal protection and high electrostatic discharge tolerance for abusive environments.
• Low power shutdown feature enables significant current reduction while maintaining fast response times.

Applications

• Industrial sensor conditioning
• Supply current sensing
• Battery and power supply monitoring
• Front-end amplifiers in abusive environments

Procurement Notes

Verify the specific grade (B or H) required for your application, as performance specifications such as operating temperature and offset voltage drift vary between grades. Confirm that the TSOT-6 package matches your PCB layout constraints. Ensure proper ESD handling procedures are followed during assembly due to the sensitivity of the device.

Selection Notes

Select this component when high common-mode voltage tolerance and precision are required simultaneously. The Over-The-Top architecture eliminates the need for external level shifting circuits in high-side sensing applications. Consider the thermal resistance and power dissipation limits if operating at elevated ambient temperatures or driving heavy loads.

Part Context

This part belongs to the ADA4099 family of precision op amps designed for industrial applications requiring robustness against overvoltage conditions. The single-channel configuration in the TSOT-6 package offers a compact solution for space-constrained designs compared to dual-channel variants.

Replacement Considerations

Public confirmed substitute part numbers: None available in source material.

FAQ

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

It allows the amplifier to accurately process signals even when the input voltage exceeds the positive supply rail, simplifying front-end designs for high-voltage sensing.

What happens if the input voltage goes below the negative supply?

The device incorporates phase reversal protection, ensuring the output does not invert unexpectedly when inputs are driven below the negative supply rail.