A new alpha release for the QA401 has been released to address Windows 1803 issue. Please use the Support link to get to the release.

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, with nearly 1 MHz of bandwidth. Simply tap into the supplies of your 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 digital signals you might need to study. If you are trying to squeeze every last bit of energy from your batteries, the QA150 will give you insight into your product you likely haven't seen before.

The QA150 is powered by the PC, but it's fully isolated. It offers high bandwidth and depending on your scope, can resolve from uA to amps. The best part is that it's a "true zero" design, which means that if you have no current flowing, then you'll measure an output voltage of microvolts--not tens of millivolts common with most current sensing solutions operating near their rail. 

Specs

  • 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

 

Related Blog Posts

Ultra-low Current Measurements with the QA150