ADA4099-1BUJZ-R5

Overview

The ADA4099-1BUJZ-R5 is a single-channel, precision operational amplifier manufactured by Analog Devices Inc. It features Over-The-Top input capability, allowing operation from −VS to +VS and beyond, with a common-mode range extending up to −VS + 70 V. The device operates on supply voltages ranging from 3.15 V to 50 V. Key electrical specifications include an 8 MHz gain bandwidth product, a typical slew rate of 5.5 V/µs, and a maximum input offset voltage of ±40 µV. It draws 1.5 mA per channel in active mode and supports low power shutdown. The component is housed in a 6-lead TSOT package.

Feature Summary

• Over-The-Top input stage enables signal detection even when biased above the positive supply rail.
• Robust front-end design provides high immunity to abusive environments and large differential overdrive.
• Integrated low power shutdown function significantly reduces quiescent current consumption.
• Unity-gain stability ensures reliable performance across various feedback configurations.

Applications

• Industrial sensor 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 against official documentation to confirm package type and temperature grade. Confirm that the BUJZ designation corresponds to the 6-lead TSOT package variant. Ensure compatibility with required thermal management strategies given the package's thermal resistance characteristics. Cross-reference the datasheet revision to validate all electrical parameters before finalizing procurement.

Selection Notes

Select this component for applications requiring precise amplification where input signals may exceed the positive supply voltage. The robust input structure protects against phase reversal during overdrive conditions. Consider the low shutdown current for battery-powered systems requiring extended standby times. Evaluate the thermal dissipation requirements based on the specific load drive and ambient operating conditions.

Part Context

This part belongs to the ADA4099 family of robust, precision operational amplifiers designed for demanding industrial environments. The series includes single (ADA4099-1) and dual (ADA4099-2) channel variants. These amplifiers are engineered to maintain accuracy and stability under extreme input conditions, making them suitable for harsh industrial settings where standard op-amps might fail or exhibit phase reversal.

Replacement Considerations

Direct substitutes within the same family include the ADA4099-2 for dual-channel requirements. Verify pinout compatibility if replacing with other packages like SOIC or MSOP. Ensure that any alternative component maintains the Over-The-Top input specification and similar supply voltage ranges to preserve circuit functionality without redesign.

FAQ

What is the Over-The-Top feature?

It allows the input common-mode voltage to operate from the negative supply up to 70 V above it, independent of the positive supply voltage.

How does the shutdown pin function?

Asserting the SHDN pin high relative to the negative supply places the amplifier in a low-power state, reducing supply current to approximately 20 µA.

Is the device immune to phase reversal?

Yes, the input stage incorporates protection to prevent output phase reversal even when inputs are driven below the negative supply rail.