INA250 - 36V Low-/High-Side, Bi-Directional, Current Sense Amp w/Precision Integrated Shunt Resistor

The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor. The integration of the precision current-sensing resistor provides calibration equivalent measurement accuracy with ultra-low temperature drift performance and ensures an optimized Kelvin layout for the sensing resistor is always obtained.

The INA250 family is available in four output voltage scales: 200 mV/A, 500 mV/A, 800 mV/A, and 2 V/A. This device is fully tested and specified for continuous currents up to 10 amps at the maximum temperature of 125°C. The INA250 operates from a single 2.7-V to 36-V supply and draws a maximum of 300 µA of supply current. All INA250 gain versions are specified over the extended operating temperature range (–40°C to 125°C), and are available in a TSSOP-16 package.

• Precision Integrated Shunt Resistor:
  • Shunt Resistor: 2 mΩ
  • Shunt Resistor Tolerance: 0.1% (Max)
  • 15 A Continuous from –40°C to 85°C
  • 0°C to 125°C Temperature Coefficient:
    10 ppm/°C
• High Accuracy:
  • Gain Error (Shunt and Amplifier): 0.3% (Max)
  • Offset Current: 50 mA (Max, INA250A2)
• Four Available Gains:
  • INA250A1: 200 mV/A
  • INA250A2: 500 mV/A
  • INA250A3: 800 mV/A
  • INA250A4: 2 V/A
• Wide Common-Mode Range: –0.1 V to 36 V
• Specified Operating Temperature: –40°C to 125°C