INA229-Q1: Low side configuration

Frederic Ahlgren

Part Number: INA229-Q1

There is one note in the documentation indicating the INA229-Q1 can be used in a high side or a low side application. I assume the means the current shunt can be either on the negative or positive battery terminal. The example is a high side configuration. Can this device be used with the shunt on the ground side of the battery?

If it is in a low side configuration the shunt negative pad is only 0.3 mm from Vbus pad on the PCB. Is any special insulation needed between the pads.

over 5 years ago

0 Mitch M over 5 years ago

TI__Mastermind 27015 points

Hello Frederic,

Thank you for using the TI forum. Low-side sensing is when the shunt is placed between the load and ground. High side sensing is when the shunt is placed between the supply and the load. See this introduction video: https://training.ti.com/ti-precision-labs-current-sense-amplifiers-current-sensing-different-types-amplifiers.

Since the INA229-Q1 can be used both high-side and low-side, the answer to your questions is yes, this device can be used with the shunt on the ground side of the battery.

Yes, the EVM can be used at low side without any extra/special insulation between the pads. (Note, even the IN- and VBUS terminals are every close together on the pins of the device itself).

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INA229-Q1: Low side configuration