ADA4097-1BUJZ-R5

Overview

The ADA4097-1BUJZ-R5 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 and beyond, supporting Over-The-Top operation up to 70 V. The device operates on supply voltages ranging from +3 V to +50 V with a typical quiescent current of 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 low input voltage noise density of 65 nV/√Hz. It provides a large signal voltage gain of at least 120 dB and includes a shutdown feature for power reduction.

Feature Summary

• Over-The-Input Capability: Inputs operate from the negative supply rail up to 70 V above it without phase reversal or damage.
• Low Power Consumption: Maintains a typical supply current of 32.5 µA per channel, reducing to under 20 µA in shutdown mode.
• High Precision Performance: Offers low input offset voltage (±60 µV max) and low drift (±1 µV/°C max) for accurate signal conditioning.
• Robust Protection: Features high electrostatic discharge tolerance (±2 kV HBM) and withstands overdrive conditions safely.

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 suffix 'R5' against the manufacturer's official ordering guide to confirm reel quantity and tape specifications. Ensure the B-grade temperature rating aligns with your system requirements, as H-grade variants offer extended thermal ranges. Confirm package availability matches the 6-lead TSOT form factor specified for the single-channel configuration.

Selection Notes

Select this component when designing circuits that require signal acquisition significantly above the positive supply rail. It is suitable for applications demanding low power consumption alongside high common-mode voltage tolerance. Consider the shutdown pin functionality if active power management is required. Verify that the 130 kHz bandwidth meets the dynamic response needs of the target application.

Part Context

This part belongs to the ADA4097 family of robust, precision op amps designed for high-voltage industrial applications. Unlike standard amplifiers, these devices utilize a dual-input stage architecture to maintain performance across normal and Over-The-Top operating regions. The single-channel variant simplifies board space usage compared to dual or quad configurations while delivering identical electrical characteristics.

Replacement Considerations

Direct replacements within the same family include the ADA4097-2 series for dual-channel requirements. Cross-referencing should focus on packages offering similar thermal resistance and pinout compatibility. Verify that any substitute maintains the 50 V continuous supply voltage limit and Over-The-Top input capability.

FAQ

How does the ADA4097 handle inputs exceeding the positive supply voltage?

The device utilizes a dedicated common-base input stage that activates when the common-mode voltage exceeds +VS by approximately 1 V. This allows the amplifier to function correctly up to 70 V above the negative supply without phase reversal or latch-up.

What is the effect of the shutdown pin on the output state?

When the SHDN pin is asserted high (above −VS + 1.5 V), the amplifier enters a low-power shutdown state. In this state, the output impedance becomes very high, effectively disconnecting the output from the load to minimize power consumption.