High-Side Setup Using Onboard Shunt Resistor - Texas Instruments INA901EVM-CVAL User Manual

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To configure the EVM using an onboard shunt resistor, follow this procedure:
Step 1. Solder a size 2512 resistor at the pads of R1. Ensure the area is clean of flux, and the
chosen resistor is thermally capable of the desired use case.
Step 2. Connect the positive and negative terminals of J1 in series with the load and bus voltage
sources while powered off. You will need to ensure proper logical order to test either the
high-side, or low-side application. See
Considerations
shows the correct connections for a high-side application using this method.
Step 3. Power on all supplies.
Step 4. Measure the output voltage at INA_OUT with respect to GND.
Step 5. Observe the overcurrent trigger: Using either a DMM or oscilloscope, measure the voltage at
CMP_OUT. Slowly increase the magnitude of the load current until it measures > 125 mV.
Observe the comparator output change states.
SBOU216A – October 2018 – Revised June 2020
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Figure 1. High-Side Setup Using Onboard Shunt Resistor
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INA901EVM-CVAL Evaluation Module User's Guide
Operation
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