Texas Instruments INA138NA/250 Current Shunt Monitor

The Texas Instruments INA138NA/250 is a unipolar, high-side current shunt monitor in a compact 5-pin SOT-23 package. It converts a differential input voltage into a current output, which is then converted back to a voltage using an external load resistor, allowing any gain from 1 to over 100 to be set with a single resistor.

Designed for current shunt measurement, this device also opens up creative applications in measurement and level shifting. Its low quiescent current of 25µA enables the power supply to be connected to either side of the measurement shunt with minimal error, enhancing flexibility in system design.

Key Features

• Wide supply and common-mode voltage range from 2.7V to 36V
• High common-mode rejection ratio (CMRR) of 120dB
• Input bias current of 2µA
• Bandwidth of 800kHz at ROUT = 5kΩ
• ±2mV offset voltage over -40°C to 125°C
• Independent supply and input common-mode voltages
• Single resistor gain set
• Operating temperature range from -40°C to 125°C

This current shunt monitor is ideal for a wide range of applications, including automotive, communications networking, portable devices, power management, and consumer electronics. Its robust design and high precision make it a reliable choice for engineers.

Note: This device has limited built-in ESD protection. Leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.