ADA4098-1BUJZ-RL7

Overview

The ADA4098-1BUJZ-RL7 is a single-channel, precision operational amplifier manufactured by Analog Devices Inc. It features an ultrawide common-mode input range extending from −VS to +VS + 70 V and supports supply voltages up to 50 V. The device provides a gain-bandwidth product of 1.05 MHz and a slew rate of 0.85 V/µs. Key electrical specifications include a maximum input offset voltage of ±35 µV (B grade) and low power consumption of 165 µA per channel. It operates within a temperature range of −55°C to +150°C and utilizes a 6-lead TSOT package.

Feature Summary

• Over-The-Top operation enables inputs to function above the positive supply rail without phase reversal.
• Robust design includes high electrostatic discharge tolerance and large signal voltage gain exceeding 126 dB.
• Low noise characteristics with a typical 1/f noise corner at 6 Hz and low input bias current.
• Integrated shutdown functionality allows for significant power reduction when the amplifier is inactive.

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 B-grade or H-grade performance requirements against the datasheet tables before ordering. Confirm that the 6-lead TSOT package aligns with the PCB footprint design. Ensure the application environment stays within the specified absolute maximum ratings to prevent permanent damage. Check for any required external components for stability when driving capacitive loads.

Selection Notes

Select this component for applications requiring precision amplification where the input signal exceeds the positive supply voltage. The low offset voltage and drift make it suitable for high-accuracy measurements. Consider the thermal resistance and power dissipation limits if operating near the upper temperature extremes. Verify that the shutdown pin logic levels match the control system interface.

Part Context

This part belongs to the ADA4098 family of robust, precision op amps designed for demanding industrial environments. The single-channel configuration distinguishes it from the dual-channel ADA4098-2. It is engineered to handle overvoltage conditions and harsh electrical noise while maintaining signal integrity.

Replacement Considerations

Direct substitutes within the same family include the ADA4098-2 for dual-channel requirements. Other Analog Devices precision amplifiers may serve as alternatives if Over-The-Top capability is not strictly necessary.

FAQ

What is the maximum voltage the inputs can tolerate relative to the negative supply?

The inputs are protected against temporary excursions down to −20 V relative to the −VS pin.

How does the device behave when the common-mode input exceeds the positive supply?

The device enters Over-The-Top mode, utilizing a secondary input stage to maintain operation without phase reversal.

What is the recommended method to disable the amplifier to save power?

Assert the SHDN pin high, specifically to a voltage greater than −VS + 1.5 V, to place the amplifier in a low-power shutdown state.