INA220: Asking for the INA220 current sensing circuit review

SHH

Mastermind 30251 points

Part Number: INA220

Hi Team,
Could you please help review INA220 schematic?

voltage is 12V.

Imax is 140A.

Thanks,
SHH

over 6 years ago

0 Carlos Silva85 over 6 years ago

TI__Expert 4915 points

SHH, can you please upload or e-mail me a higher resolution image?

0 SHH over 6 years ago in reply to Carlos Silva85

TI__Mastermind 30251 points

Hi Carlos,

Please refer to the link here.P12V_CS_x01_20170728.7z

SHH

0 Carlos Silva85 over 6 years ago in reply to SHH

TI__Expert 4915 points

1) I2C Lines A0 and A1 should be connected to either valid configuration, as per table below, without resistors.

2) The configuration with multiple shunt resistors is not recommended by TI due to the variation of voltages in different circuit locations due to PCB copper thickness and layout. Given the very low ohmic value of the current-sensing resistor, any additional high-current carrying
impedance causes significant measurement errors - I suggest the number of shunt resistors to be minimised or reduced to one.

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INA220: Asking for the INA220 current sensing circuit review