Overview
The INA250A1PWR, produced by Texas Instruments, is a voltage-output, current-sensing amplifier that integrates a precision internal shunt resistor. This device is designed to enable high-accuracy current measurements across a wide range of common-mode voltages, from 0 V to 36 V, independent of the supply voltage. It operates as a bidirectional, low- or high-side current-shunt monitor, allowing for the measurement of current flowing in both directions through the internal current-sensing resistor sensor. The INA250A1PWR 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 of the application.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Shunt Resistor | 2 mΩ | |
| Shunt Resistor Tolerance | 0.1% (Max) | |
| Continuous Current | ±15 A (–40°C to 85°C) | |
| Temperature Coefficient | 10 ppm/°C (0°C to 125°C) | |
| Gain Error (Shunt and Amplifier) | 0.3% (Max) | |
| Offset Current | ±50 mA (Max, INA250A2) | |
| Available Gains | 200 mV/A (INA250A1), 500 mV/A (INA250A2), 800 mV/A (INA250A3), 2 V/A (INA250A4) | |
| Common-Mode Range | –0.1 V to 36 V | |
| Operating Supply Voltage | 2.7 V to 36 V | |
| Quiescent Current | 200 μA to 300 μA | |
| Operating Temperature Range | –40°C to 125°C | |
| Package Type | TSSOP-16 |
Key Features
- Precision Integrated Shunt Resistor: 2 mΩ with a tolerance of 0.1% (Max) and a temperature coefficient of 10 ppm/°C from 0°C to 125°C.
- High Accuracy: Gain error of 0.3% (Max) and offset current of ±50 mA (Max) for INA250A2.
- Multiple Gain Options: Available in four gain versions: 200 mV/A (INA250A1), 500 mV/A (INA250A2), 800 mV/A (INA250A3), and 2 V/A (INA250A4).
- Wide Common-Mode Range: Operates from –0.1 V to 36 V.
- Extended Operating Temperature Range: Specified from –40°C to 125°C.
- Low Power Consumption: Quiescent current of 200 μA to 300 μA.
- Bidirectional Measurement: Allows for the measurement of current flowing in both directions through the internal current-sensing resistor sensor.
Applications
- Test Equipment: For precise current measurements in various test and measurement applications.
- Power Supplies: To monitor and control current in power supply systems.
- Servers and Telecom Equipment: For current monitoring in high-reliability server and telecom infrastructure.
- Automotive Systems: Suitable for automotive applications requiring high accuracy and reliability.
- Solar Inverters: To monitor and optimize current flow in solar inverter systems.
- Power Management: For efficient current sensing and management in various power management systems.
Q & A
- What is the shunt resistor value of the INA250A1PWR?
The shunt resistor value is 2 mΩ with a tolerance of 0.1% (Max).
- What are the available gain options for the INA250 family?
The INA250 family is available in four gain versions: 200 mV/A (INA250A1), 500 mV/A (INA250A2), 800 mV/A (INA250A3), and 2 V/A (INA250A4).
- What is the common-mode range of the INA250A1PWR?
The common-mode range is from –0.1 V to 36 V.
- What is the operating temperature range of the INA250A1PWR?
The specified operating temperature range is from –40°C to 125°C.
- How much quiescent current does the INA250A1PWR consume?
The quiescent current is between 200 μA and 300 μA.
- What is the package type of the INA250A1PWR?
The package type is TSSOP-16.
- Can the INA250A1PWR measure current in both directions?
Yes, it allows for the measurement of current flowing in both directions through the internal current-sensing resistor sensor.
- What are some typical applications of the INA250A1PWR?
Typical applications include test equipment, power supplies, servers, telecom equipment, automotive systems, solar inverters, and power management systems.
- What is the maximum continuous current the INA250A1PWR can handle?
The maximum continuous current is ±15 A from –40°C to 85°C.
- How accurate is the gain error of the INA250A1PWR?
The gain error is ±0.3% (Max).
