QA150 High Side Current Sense Amp

Regular price $139.00 Sale

The QA150 makes ultra-low current measurements of your toughest real-time projects a snap. The QA150 is a high side current to voltage converter. Simply tap into the supply for your various project rails (5V, 3.3V, etc) and the QA150 will convert the currents to voltages that you can then capture on your scope, along with whatever other signals you might need. If you are trying to squeeze every last bit of energy from your batteries, the QA150 is your answer. 

The QA150 is powered by the PC, but fully isolated. It offers very high bandwidth (nearly 1 MHz) and depending on your scope, can resolve from uA to amps. The best part is that it's a "true zero" design, meaning if you have no current flowing, then you'll measure an output voltage of microvolts. 


  • 4 input channels, each with different sensitivity:
    • CH1: 10 ohm sense, 1mA=1V, 20mA max
    • CH2: 1 ohm sense, 10mA=1V, 200mA max
    • CH3: 0.1 ohm sense, 100mA=1V, 2A max
    • CH4: 0.01 ohm sense, 1A=1V, 5Arms/10A peak for 0.2sec
  • Fully isolated from PC
  • Minimum 3V sense voltage
  • Maxium 24V sense voltage


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Ultra-low Current Measurements with the QA150