INA233: INA233AIDGST, Register reading

Sailaja Gaddam

Part Number: INA233

Hi,

I am using INA233 Current and Power Monitor in my design. I am able to read the register value but not able to analyse the values. Can u help me to analyse

D1H- 7B 06

D4H-01 00

88H-81 25

Thanks in advance.

over 5 years ago

0 Ian Williams over 5 years ago

TI__Mastermind 27715 points

Hello Sailaja,

Thank you for your question! Our engineers will analyze and respond when we return to the office on Monday.

Best regards,

Ian Williams
Applications Manager
Current Sensing

0 Guang Zhou over 5 years ago in reply to Ian Williams

TI__Mastermind 34960 points

Hi Sailaja,

D4H is returning the default value, ie, decimal 1.

For the other two, multiply the decimal readings with corresponding LSB, then we have the shunt voltage and bus voltage respectively:

Vshunt=2.5uV*1659’d=4.1475mV

VBUS=1.25mV*9601’d=12.00125V

Please note that upper and lower bytes are swapped in all readings, ie, least significant byte comes first.

Regards, Guang

0 Sailaja Gaddam over 5 years ago in reply to Guang Zhou

Prodigy 70 points

Hi Guang,

Thanks for your explanation.

Why LSB and MSB are swapped in reading , is this specified in datasheet?

Regards,

Sailaja

0 Guang Zhou over 5 years ago in reply to Sailaja Gaddam

TI__Mastermind 34960 points

Hi Sailaja,

The specification is explained in detail in datasheet section 7.5.6.3.

The datasheet also calls attention by this note:

Regards, Guang

0 Sailaja Gaddam over 5 years ago in reply to Guang Zhou

Prodigy 70 points

Thank you

you Resolved my doubt

0 Guang Zhou over 5 years ago in reply to Sailaja Gaddam

TI__Mastermind 34960 points

Hi Sailaja,

Glad to help. And thank you for the confirmation.

Regards, Guang

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INA233: INA233AIDGST, Register reading