Manufacturer: Texas Instruments

Key Specifications

• Package: SOT23-5
• Supply Voltage: 2.7V to 40V
• Accuracy: ±0.5%
• Common-Mode Voltage: 2.7V to 40V
• Quiescent Current: To be verified
• Bandwidth: To be verified
• Operating Temperature: -40°C to +125°C

The INA139NA-3K from Texas Instruments is a high-side current sense monitor designed for precise current measurement in a variety of applications. It operates over a wide common-mode voltage range of 2.7V to 40V, making it suitable for both low and high voltage systems. The device provides an output voltage proportional to the sensed current, with a typical accuracy of ±0.5%, ensuring reliable monitoring for power management and protection circuits.

Key Features

• High-side current sensing with common-mode voltage range from 2.7V to 40V
• Accuracy of ±0.5% over temperature
• Wide supply voltage range: 2.7V to 40V
• Compact SOT23-5 package for space-constrained designs
• Operating temperature range: -40°C to +125°C
• Low quiescent current (to be verified)

Applications

• Power supply monitoring
• Battery management systems
• Motor control
• Load detection and protection

Selection Guide

When selecting the INA139NA-3K, consider the required common-mode voltage range and accuracy. The device is suitable for applications where high-side sensing is preferred. For lower voltage or different accuracy requirements, other models in the INA series may be considered. Always refer to the datasheet for detailed specifications and application circuits.