Overview
The INA250A3PWR is a precision current-sensing amplifier from Texas Instruments, designed to provide high-accuracy current measurements in a variety of applications. This device integrates a 2-mΩ precision shunt resistor and a 36-V common-mode, zero-drift topology amplifier in a single package. It is capable of measuring current in both directions and operates over a wide common-mode voltage range from 0 V to 36 V, independent of the supply voltage. The INA250A3PWR is part of the INA250 family, which offers multiple gain versions to optimize the desired full-scale output voltage based on the target current range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Shunt Resistor | 2 mΩ | |
| Shunt Resistor Tolerance | 0.1% (Max) | |
| Maximum Continuous Current | 15 A (–40°C to 85°C), 10 A (–40°C to 125°C) | A |
| Gain | 800 mV/A | mV/A |
| Common-Mode Input Range | –0.1 V to 36 V | V |
| Operating Supply Voltage | 2.7 V to 36 V | V |
| Operating Temperature Range | –40°C to 125°C | °C |
| Quiescent Current | 200 µA to 300 µA | µA |
| Package Type | TSSOP-16 |
Key Features
- Precision Integrated Shunt Resistor: 2 mΩ with 0.1% maximum tolerance and a temperature coefficient of 10 ppm/°C.
- High Accuracy: Gain error and offset current are minimized, ensuring high-accuracy measurements.
- Multiple Gain Versions: Available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- Wide Common-Mode Range: Operates from –0.1 V to 36 V, independent of the supply voltage.
- Low Power Consumption: Draws a maximum of 300 µA of supply current.
- Robust Thermal Performance: Specified for continuous currents up to 15 A at 85°C and 10 A at 125°C with proper thermal management.
Applications
- Test Equipment: For precise current measurements in test and measurement devices.
- Power Supplies: To monitor and control current in power supply units.
- Servers and Telecom Equipment: For current monitoring in high-reliability systems.
- Automotive Systems: For battery management and other current-sensing applications.
- Solar Inverters and Power Management: To optimize energy efficiency and reliability.
Q & A
- What is the shunt resistor value of the INA250A3PWR?
The shunt resistor value is 2 mΩ with a tolerance of 0.1% maximum.
- What are the available gain versions of the INA250 family?
The INA250 family is available in four gain versions: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- What is the operating temperature range of the INA250A3PWR?
The device operates over a temperature range of –40°C to 125°C.
- What is the maximum continuous current the INA250A3PWR can handle?
The device can handle up to 15 A continuously at temperatures up to 85°C and up to 10 A at 125°C.
- What is the common-mode input range of the INA250A3PWR?
The common-mode input range is from –0.1 V to 36 V.
- What is the quiescent current of the INA250A3PWR?
The quiescent current is between 200 µA and 300 µA.
- In what package is the INA250A3PWR available?
The device is available in a TSSOP-16 package.
- What are some typical applications of the INA250A3PWR?
Typical applications include test equipment, power supplies, servers, telecom equipment, automotive systems, and solar inverters.
- How does the INA250A3PWR handle thermal stress?
The device is designed to handle thermal stress with proper thermal management, allowing it to operate safely up to 125°C.
- Can the INA250A3PWR measure current in both directions?
Yes, the device is capable of measuring current in both directions through the internal current-sensing resistor.
