QorIQ SENSEVDD and SENSEGND pins electrical characteristics

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QorIQ SENSEVDD and SENSEGND pins electrical characteristics

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fdm
Contributor IV

Hi,

What is the order of magnitude of the SENSEVDD/SENSEGND pins output impedance and what current levels they can safely source/sink (first and foremost, for QorIQ T1040 and/or LS1021A)?

BR,
   Denis

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ufedor
NXP Employee
NXP Employee

Please note that the SENSE signals are just connected to the corresponding VDD and GND on-chip networks somewhere in the middle of the cores' "cluster".

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fdm
Contributor IV

The question is just about electrical characteristics of this connection.

Could we assume that the impedance value is on the order of hundreds of milliohms (or a few ohms in the worst case)?

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ufedor
NXP Employee
NXP Employee

Impedance of what?

Please understand that these signals can be considered as ordinary VDD and GND pins.

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fdm
Contributor IV

I'm trying to evaluate the influence of an external sensing circuit input impedance on the measurement accuracy.

Given that these signals in essence are power pins, I believe that my estimation is close to reality.

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