Overview
The INA250A2PWR is a part of the INA250 family of voltage-output, current-sensing amplifiers produced by Texas Instruments. This device is designed to integrate an internal shunt resistor, enabling 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 INA250A2PWR is particularly useful in applications requiring precise current sensing with minimal temperature drift and high accuracy.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 16-TSSOP (PW) |
| Pins | 16 |
| Operating Temperature Range (°C) | -40 to 125 |
| Shunt Resistor | 2 mΩ |
| Shunt Resistor Tolerance | 0.1% (Max) |
| Continuous Current Rating | 15 A from -40°C to 85°C |
| Temperature Coefficient | 10 ppm/°C from 0°C to 125°C |
| Gain Error (Shunt and Amplifier) | 0.3% (Max) |
| Offset Current | 50 mA (Max, INA250A2) |
| Available Gains | 200 mV/A, 500 mV/A, 800 mV/A, 2 V/A |
| Common-Mode Range | -0.1 V to 36 V |
| Supply Voltage | 2.7 V to 36 V |
| Supply Current | 300 µA (Max) |
| Slew Rate | 0.2 V/µs |
| Gain Bandwidth Product | 50 kHz |
Key Features
- Precision Integrated Shunt Resistor: 2 mΩ with 0.1% tolerance and 10 ppm/°C temperature coefficient.
- High Accuracy: Gain error of 0.3% (Max) and offset current of 50 mA (Max, INA250A2).
- Four Available Gains: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- Wide Common-Mode Range: -0.1 V to 36 V.
- Bidirectional Current Sensing: Measures current flowing in both directions through the internal shunt resistor.
- Low Power Consumption: Operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current.
- Extended Operating Temperature Range: Specified over -40°C to 125°C.
Applications
The INA250A2PWR is suitable for a variety of applications that require precise current sensing, including:
- Automotive systems: For monitoring battery current, motor current, and other high-current applications.
- Industrial automation: For current sensing in motor drives, power supplies, and other industrial equipment.
- Power management: For monitoring current in power supplies, battery management systems, and renewable energy systems.
- Medical devices: For precise current measurement in medical equipment such as defibrillators and ventilators.
Q & A
- What is the INA250A2PWR used for?
The INA250A2PWR is a current-sensing amplifier used for precise measurement of current in various applications, including automotive, industrial, power management, and medical devices.
- What is the shunt resistor value and tolerance of the INA250A2PWR?
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 offers four gain options: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A.
- What is the operating temperature range of the INA250A2PWR?
The operating temperature range is -40°C to 125°C.
- What is the supply voltage range for the INA250A2PWR?
The supply voltage range is 2.7 V to 36 V.
- How much supply current does the INA250A2PWR draw?
The INA250A2PWR draws a maximum of 300 µA of supply current.
- What is the common-mode range of the INA250A2PWR?
The common-mode range is -0.1 V to 36 V.
- Is the INA250A2PWR suitable for high-current applications?
Yes, it is specified for continuous currents up to 10 amps at the maximum temperature of 125°C.
- What is the slew rate of the INA250A2PWR?
The slew rate is 0.2 V/µs.
- What is the gain bandwidth product of the INA250A2PWR?
The gain bandwidth product is 50 kHz.
