TIINA138NA/3K
Overview
The INA138NA/3K is a unipolar high-side current shunt monitor designed for precise current measurement in a compact SOT-23-5 package. It features a single resistor for gain setting and operates over a wide input voltage range of 2.7V to 36V. This device provides a complete solution for monitoring current by converting the voltage drop across a shunt resistor into an output current.
Why Choose This Part
The INA138NA/3K offers high accuracy with a typical error of +/-0.5%, making it suitable for critical measurement applications. Its compact SOT-23-5 package and low quiescent current of 25 uA are beneficial for space-constrained and power-sensitive designs. The ability to set the gain with a single external resistor simplifies circuit design and reduces component count.
Applications
Key Specifications
Getting Started
To get started with the INA138NA/3K, design a circuit that includes a current shunt resistor in series with the load. Connect the device's input pins across this shunt resistor. The output current, proportional to the shunt voltage, can then be converted to a voltage using an external resistor to an ADC or comparator. Refer to the Texas Instruments datasheet for detailed application examples and gain setting calculations.
