ADA4098-2BCPZ

Overview

The ADA4098-2BCPZ is a dual-channel precision operational amplifier manufactured by Analog Devices Inc. It features an ultrawide common-mode input range extending from −VS to +VS and beyond, supporting supply voltages up to 50 V. The device offers low power consumption with a typical supply current of 165 µA per channel and includes a shutdown function reducing current to 20 µA maximum. Key electrical specifications include a gain-bandwidth product of 1.05 MHz, a slew rate of 0.85 V/µs, and a maximum input offset voltage of ±35 µV for the B grade. It provides high CMRR (120 dB minimum) and PSRR (123 dB minimum), ensuring robust performance in industrial environments.

Feature Summary

• Over-The-Top operation allows inputs to function above the positive supply rail without phase reversal.
• Robust design tolerates large signal overdrive and withstands electrostatic discharge events.
• Low noise characteristics with a 1/f noise corner at 6 Hz and low input offset voltage drift.
• Integrated shutdown capability enables 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 package variant against the datasheet ordering guide, as the BC suffix denotes a specific temperature or grade configuration not fully detailed in general summaries. Confirm availability status through authorized distributors, as stock levels fluctuate. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS input stages. Cross-reference pinout requirements for the SOIC_N or LFCSP package if applicable to the specific revision.

Selection Notes

Select this component for applications requiring precision amplification where input signals may exceed the positive supply voltage. The B grade specification ensures tighter offset voltage limits compared to standard grades. Consider the thermal resistance values when designing PCB layouts for high ambient temperatures. Verify that the required bandwidth and slew rate meet the dynamic signal requirements of the target application circuit.

Part Context

This part belongs to the ADA4098 family of robust, precision op amps designed for harsh industrial conditions. The dual-channel version (ADA4098-2) integrates two identical amplifiers in a single package, saving board space compared to using two single-channel devices. The family shares core architectural features like Over-The-Top input stages and low quiescent current, making it suitable for battery-powered and high-voltage systems.

Replacement Considerations

Public confirmed substitute part numbers: ADA4098-1BCPZ (single-channel equivalent).

FAQ

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

It allows the amplifier inputs to operate at voltages higher than the positive supply rail (+VS), enabling direct connection to high-side current sense resistors or sensors without level shifting.

What is the input protection mechanism against negative voltages?

Internal 880 Ω resistors protect the inputs against temporary voltage excursions down to 20 V below the negative supply rail (−VS).