ADA4097-2HCPZ

Overview

The ADA4097-2HCPZ 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 ranging from +3 V to +50 V and consumes 32.5 µA per channel. Key electrical specifications include a gain bandwidth product of 130 kHz, a maximum input offset voltage of ±60 µV, and a typical slew rate of 0.1 V/µs. It provides high common-mode rejection (120 dB minimum) and power supply rejection (123 dB minimum). The H-grade variant supports an extended operating temperature range from −55°C to +150°C.

Feature Summary

• Over-The-Top capability allows the input common-mode voltage to exceed the positive supply rail up to 70 V without phase reversal.
• Robust design includes input overdrive tolerance and electrostatic discharge protection rated at ±2 kV HBM and ±1.25 kV FICDM.
• Low quiescent current consumption of 32.5 µA per channel ensures energy efficiency in battery-powered applications.
• High precision performance characterized by low input offset voltage drift and high open-loop gain.

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 type associated with the HCPZ suffix against official documentation, as it denotes a Lead-frame Chip-Scale Package. Confirm that the H grade designation aligns with the required extended temperature range for your application. Ensure compatibility with the shutdown pin configuration if utilizing the LFCSP variant. Cross-reference the ordering guide to validate availability and exact part identification before procurement.

Selection Notes

Select this component when signal conditioning requires inputs exceeding the positive supply voltage while maintaining precision. The dual-channel architecture suits space-constrained designs needing two independent amplifiers. Consider the H grade for harsh environments requiring operation above standard industrial limits. Evaluate the low power consumption against system battery life requirements. Verify that the 130 kHz bandwidth meets the frequency response needs of the target signal path.

Part Context

This device belongs to the ADA4097 family of robust, precision operational amplifiers designed for demanding industrial applications. The family includes single-channel and quad-channel variants, offering flexibility in system design. The HCPZ suffix indicates a specific package and temperature grade within this series. These amplifiers are engineered to handle abusive electrical conditions while preserving signal integrity.

Replacement Considerations

Consult the manufacturer's related products section for direct functional equivalents. Verify pinout compatibility and electrical parameter overlaps before substituting. Ensure thermal characteristics match the existing board layout constraints.

FAQ

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

It allows the amplifier to accurately process signals that exceed the positive supply voltage, simplifying high-side current sensing and other applications where the signal source is referenced above the system ground.

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

When the common-mode input voltage exceeds the positive supply rail by more than 1 V, the input stage switches to a common base configuration, causing the input bias current to increase significantly compared to normal operation.