INA115AU-1/1K

Overview

The INA115AU-1/1K is a precision instrumentation amplifier manufactured by Texas Instruments, housed in a 16-pin SOIC package. It features a single channel with a 3dB bandwidth of 10 kHz and a common-mode rejection ratio (CMRR) of 110 dB. The device operates on a supply voltage ranging from 4.5 V to 36 V, drawing a typical operating current of 2.2 mA. Key electrical specifications include an input bias current of 2 nA and an input offset voltage of 50 µV. It supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides high precision signal amplification suitable for low-level sensor interfaces
• Delivers high common-mode rejection to isolate differential signals effectively
• Operates reliably across a wide dual-supply voltage range

Applications

• Precision data acquisition systems
• Industrial process control loops
• Medical instrumentation front-ends

Procurement Notes

Verify the specific suffix configuration against official datasheets to ensure compatibility with required packaging and temperature grades. Confirm that the component meets all necessary regulatory standards for the intended application environment before finalizing procurement decisions.

Selection Notes

Select this component when high accuracy and stability are required for DC and low-frequency AC signals. Consider the 10 kHz bandwidth limitation for applications requiring higher frequency response. Evaluate power consumption constraints relative to the 2.2 mA operating current draw.

Part Context

This part belongs to the INA115 series of instrumentation amplifiers designed for general-purpose precision applications. It offers a balance of performance and ease of use, utilizing a standard three-op-amp topology internally. The series is widely recognized for its robustness in industrial environments.

Replacement Considerations

Consult official substitution guides for compatible alternatives within the same family or equivalent performance tiers. Verify pinout compatibility and electrical parameter overlaps before implementing any substitute components.