INA281A4IDBVR

Overview

The INA281A4IDBVR is a high-precision current sense amplifier from Texas Instruments, packaged in a SOT-23-5 surface-mount case. It features a fixed gain of 200 V/V and supports bidirectional current sensing with a common-mode voltage range of -4 V to 110 V. Key electrical specifications include a maximum input offset voltage of 30 µV, an input bias current of 20 µA, and a gain error of 0.5%. The device operates on a supply voltage between 2.7 V and 20 V, drawing 1.5 mA of quiescent current. It offers a gain-bandwidth product of 900 kHz, a slew rate of 2.5 V/µs, and an input voltage noise density of 50 nV/√Hz. The component functions within a temperature range of -40°C to +125°C.

Feature Summary

• Supports bidirectional current sensing with a wide common-mode voltage range extending from -4 V to 110 V.
• Provides high precision with low input offset voltage and minimal gain error for accurate measurements.
• Features a compact SOT-23-5 package suitable for space-constrained surface-mount applications.

Applications

• Industrial process control systems
• Power supply monitoring circuits
• Battery management systems

Procurement Notes

Verify the specific suffix IDBVR corresponds to the SOT-23-5 package and tape-and-reel orientation required for your assembly line. Confirm that the A4 variant matches the necessary gain accuracy and offset voltage specifications for your design. Ensure compatibility with your PCB footprint and reflow soldering profile standards before finalizing procurement orders.

Selection Notes

Select this component when a fixed 200 V/V gain is required for high-side or low-side sensing in environments with high common-mode voltages. It is suitable for designs needing low noise and high precision without the complexity of adjustable gain amplifiers. Consider the SOT-23-5 package constraints if board space is limited compared to larger packages like SOIC or WSON.

Part Context

This part belongs to the INA281 family of current sense amplifiers, designed for robust performance in demanding industrial and commercial applications. The series is characterized by its ability to handle high common-mode voltages while maintaining signal integrity. The INA281A4IDBVR represents a specific configuration within this lineup, optimized for precision measurement tasks requiring a fixed gain factor.

Replacement Considerations

Check datasheets for alternative parts offering similar gain and common-mode voltage ranges. Verify pinout compatibility if substituting directly into existing footprints. Ensure thermal performance and package dimensions match your mechanical constraints.