INA240-Q1: Transfer function

Gustavo Monroy

Intellectual 2020 points

Part Number: INA240-Q1

Hello,

Could you please provide the transfer function H(S) = Vout(S) / Iin(S) of the INA240A2-Q1?

It is for a project where closed loop is required, the signal is not a sine wave and mathematical expressions are mandatory to make the system work correctly.

Thanks

Gustavo Monroy

over 4 years ago

0 Guang Zhou over 4 years ago

TI__Mastermind 34660 points

Hi Gustavo,

INA240A2 is a complex system and unfortunately we don’t have a closed form math model. All we have is the typical curve given in the datasheet.

However to satisfy the requirement of your project, I would start by describing this curve with a simplistic model, such as a second order equation:

I would choose

This may be close enough. If not then a more complex approximation may be necessary.

Regards, Guang

0 Gustavo Monroy over 4 years ago in reply to Guang Zhou

TI__Intellectual 2020 points

Hi Guang,

Exact phase, impedances, etc need to be taken into account in the transfer function, we definitely need a more accurate model, how long would this take to have it available?

could you please also provide input and output impedance of the device?

Thanks

Gustavo

0 Guang Zhou over 4 years ago in reply to Gustavo Monroy

TI__Mastermind 34660 points

This is now being resolved offline. Will close this thread.

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INA240-Q1: Transfer function