INA226EVM: Should the Resistor Divider on the TIDA-00313 be connectect to V- instead of V+

joe lindula

Part Number: INA226EVM

Hello, I'm looking over the -48V Telecom Current, Voltage and Power Sense with Isolation Design and I notice that in the schematics the VBUS voltage is connected to V+ pin 10 instead of V- pin 9.

https://www.ti.com/product/INA226

TIDRAN8.PDF

https://www.ti.com/tool/TIDA-00313

If you look on INA 226 datasheet you will see that the voltage devider on VBUS is connected to Vin- not Vin+.

Which is correct?

over 1 year ago

+1 Guang Zhou over 1 year ago

TI__Mastermind 30820 points

Hi,

Either connection can be chosen, both are correct.

With the datasheet connection, voltage drop over the shunt resistor is excluded, consequently only the power dissipated by load is measured; while it is included with the reference design connection.

Regards, Guang

0 joe lindula over 1 year ago in reply to Guang Zhou

Mastermind 6870 points

Thank you very much

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INA226EVM: Should the Resistor Divider on the TIDA-00313 be connectect to V- instead of V+