INA2133UA/2K5G4

Overview

The INA2133 is a precision, zero-drift, rail-to-rail output amplifier designed for high-side current sensing applications. It features an integrated 0.1% laser-trimmed gain resistor providing fixed gains of 50 V/V or 200 V/V depending on the specific suffix. The device operates with a supply voltage range from 2.7V to 36V and maintains low offset voltage drift over temperature. It includes internal ESD protection and short-circuit protection on the outputs.

Feature Summary

• Integrated laser-trimmed gain resistor eliminates external component tolerance errors
• Zero-drift architecture ensures minimal offset voltage variation across temperature ranges
• Rail-to-rail output capability maximizes dynamic range in single-supply systems

Applications

• High-side current sensing in industrial process control loops
• Battery management systems requiring precise charge monitoring
• Motor drive current limiting and protection circuits

Procurement Notes

Verify the exact gain configuration by checking the full part number suffix against the manufacturer's official datasheet. Confirm that the package type matches your PCB footprint requirements. Ensure the operating voltage range aligns with your system's power supply specifications before procurement.

Selection Notes

Select this component when high accuracy and stability are required without external trimming. Consider the fixed gain options to simplify design. Evaluate the input common-mode voltage range relative to your high-side sense node potential. Verify thermal performance under expected load conditions.

Part Context

This device belongs to Texas Instruments' precision amplifier family, specifically optimized for current sensing. It replaces older discrete solutions by integrating gain resistors internally. The series offers various gain options to suit different signal levels while maintaining consistent performance characteristics across the product line.

Replacement Considerations

Check for direct pin-compatible alternatives within the same TI family such as the INA2130 or INA2131 series. Verify that substitute parts offer comparable offset voltage drift and bandwidth specifications. Ensure the replacement supports the required supply voltage range and package style.