ADA4098-2HCPZ-RL7

Overview

The ADA4098-2HCPZ-RL7 is a dual-channel, precision operational amplifier manufactured by Analog Devices Inc. It features Over-The-Top operation with an ultrawide common-mode input range extending from −VS to +VS + 70 V. The device operates on supply voltages from +3 V to +50 V and consumes 165 µA per channel. Key electrical parameters 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. It provides high CMRR (120 dB minimum) and PSRR (123 dB minimum), along with low input voltage noise of 17 nV/√Hz.

Feature Summary

• Supports Over-The-Top input operation allowing signals to exceed the positive supply rail up to 70 V above the negative supply.
• Features robust input protection against overdrive conditions without phase reversal and withstands electrostatic discharge events.
• Includes dedicated shutdown pins for each channel to minimize power consumption during inactive periods.

Applications

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

Procurement Notes

Verify that the H grade suffix corresponds to the extended temperature range of −55°C to +150°C as specified in the datasheet. Confirm the CPZ package designation matches the required 10-lead LFCSP form factor. Ensure the RL7 suffix indicates reel packaging compatible with automated assembly processes. Cross-reference the specific B or H grade requirements for offset voltage drift specifications before finalizing procurement.

Selection Notes

Select this component when applications require precise signal amplification under extreme common-mode voltage conditions exceeding standard supply rails. The dual-channel configuration is suitable for differential sensing or multi-sensor interfaces. Consider the thermal shutdown threshold at 175°C and the maximum operating voltage limit of 50 V for circuit design constraints. Evaluate the need for shutdown functionality to manage system power budgets effectively.

Part Context

This part belongs to the ADA4098 family of robust, precision operational amplifiers designed for demanding industrial environments. The dual-channel variant integrates two independent amplifiers within a single package, optimizing board space compared to using separate single-channel devices. The family emphasizes high accuracy combined with resilience against electrical overstress and wide dynamic input ranges.

Replacement Considerations

ADA4098-2ACPZ

FAQ

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

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

What is the input bias current behavior in the Over-The-Top region?

When the common-mode input exceeds +VS − 1.25 V, the internal circuitry switches to a common base input pair, causing the input bias current to increase to approximately 8 µA.