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INA139NA/3KG4 from TEXAS

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INA139NA/3KG4

Manufacturer: TEXAS, TI

High-Side Measurement CURRENT SHUNT MONITOR

Partnumber Manufacturer Quantity Availability
INA139NA/3KG4,INA139NA3KG4 TEXAS, TI 41 In Stock

Description and Introduction

High-Side Measurement CURRENT SHUNT MONITOR The **INA139NA/3KG4** is a high-side current shunt monitor manufactured by **Texas Instruments (TI)**. Below are its key specifications, descriptions, and features based on the available knowledge base:

### **Specifications:**
- **Manufacturer:** Texas Instruments  
- **Category:** Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management  
- **Package:** SOT-23-5  
- **Operating Temperature Range:** -40°C to +125°C  
- **Supply Voltage Range:** 2.7V to 36V  
- **Common-Mode Voltage Range:** 0V to 36V (independent of supply voltage)  
- **Gain:** Fixed 50V/V  
- **Accuracy:** ±1% (max) gain error  
- **Bandwidth:** 500kHz  
- **Quiescent Current:** 60µA (typical)  
- **Output Type:** Voltage  

### **Descriptions:**
The **INA139NA/3KG4** is a precision current shunt monitor designed for high-side current sensing applications. It provides a fixed gain of 50V/V, converting the voltage drop across a shunt resistor into a ground-referenced output voltage. It operates over a wide supply and common-mode voltage range, making it suitable for industrial, automotive, and power management systems.

### **Features:**
- **Wide Common-Mode Voltage Range:** 0V to 36V  
- **Low Quiescent Current:** 60µA (typical)  
- **Fixed Gain:** 50V/V  
- **High Accuracy:** ±1% (max) gain error  
- **Small Package:** SOT-23-5  
- **Wide Supply Voltage Range:** 2.7V to 36V  
- **High Bandwidth:** 500kHz  
- **Low Input Offset Voltage:** ±150µV (max)  
- **Reverse Polarity Protection:** Yes  

This device is commonly used in battery monitoring, power supplies, motor control, and overcurrent protection circuits.  

(Note: Ensure to verify datasheet details for exact application-specific parameters.)

Application Scenarios & Design Considerations

High-Side Measurement CURRENT SHUNT MONITOR

Alternative Part Number

  • INA139NA/3K --: Same INA139 high-side current shunt monitor in SOT-23-5 package, identical electrical specifications; the /3KG4 suffix only denotes tape-and-reel packing and green/RoHS grade, so this is a direct drop-in replacement.
  • INA139NA/250 --: Same INA139 device in the same SOT-23-5 package with identical pinout and performance, supplied in a different reel quantity; functionally interchangeable with the original.
  • INA138NA/3K --: Closely related INA138 current shunt monitor from the same family in the same SOT-23-5 package; it differs mainly in gain configuration, so verify the gain setting against the application before substituting.
  • ZXCT1009FTA --: High-side current monitor with similar function and SOT-23 package, a common drop-in alternative to the INA139.
  • MAX4173TESA+ --: High-side current-sense amplifier with comparable gain and supply range, widely used as a functional substitute.
  • ACS712ELCTR-05B-T --: Hall-effect current sensor offering isolated current measurement, suitable when galvanic isolation is acceptable.

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