INA250A4PWR

Overview

The INA250A4PWR is a bidirectional current sense amplifier from Texas Instruments featuring a precision integrated shunt resistor. It operates within a supply voltage range of 2.7 V to 36 V and draws a maximum operating supply current of 350 uA. The device provides an accuracy of 0.3% and supports a bandwidth of 50 kHz. It functions across a temperature range of -40°C to +125°C and is housed in a TSSOP-16 package.

Feature Summary

• Integrates a precision shunt resistor to simplify PCB layout and reduce component count.
• Supports both high-side and low-side current sensing configurations.
• Provides bidirectional measurement capability for accurate monitoring of current flow direction.

Applications

• Industrial process control systems requiring precise current monitoring.
• Power supply units needing bidirectional current protection and regulation.
• Motor drive circuits for detecting overcurrent conditions and managing power delivery.

Procurement Notes

Verify the specific suffix 'A4' corresponds to the required gain setting, as variations exist within the INA250 family. Confirm the TSSOP-16 package availability matches your assembly requirements. Check humidity sensitivity handling instructions if storage conditions exceed specified limits. Ensure the 0.3% accuracy specification meets your system tolerance needs before finalizing procurement.

Selection Notes

Select this component when a compact solution integrating the sense resistor is preferred over discrete designs. The 36 V common-mode range allows compatibility with various bus voltages. Consider the 50 kHz bandwidth for applications not requiring high-frequency switching noise immunity. The bidirectional feature is essential for systems where current may reverse direction during operation.

Part Context

This part belongs to the INA250 series of current-shunt monitors designed for high-precision applications. Unlike standard amplifiers that require external shunts, this device integrates the resistor, ensuring matched thermal tracking between the sense element and the amplifier. This integration minimizes errors caused by temperature gradients across separate components on the PCB.

Replacement Considerations

The INA250A4PWRG4 is a verified lead-free replacement variant within the same functional family. Verify pinout compatibility and electrical specifications match before substitution. Other INA250 variants differ primarily in gain settings; ensure the selected substitute maintains the required signal scaling for your application.