Sensors - INTERNAL forum

Miles Li1

Intellectual 1640 points

Part Number: TMCS1100

Hi team,

Customer is wondering what is the default Vout if VREF is floating and why, in below application situation:

I=5A;
I=0A;

Wish to get your reply, thanks!

over 4 years ago

+1 Carolus Andrews over 4 years ago

TI__Mastermind 22560 points

Miles,

If the REF pin is allowed to float it will do just that. The reference will float to an unknown value and the reference will be incorrect/unknown, and therefore the output will be unknown/incorrect. The REF pin needs to be driven to a known value for proper operation.

0 Miles Li1 over 4 years ago in reply to Carolus Andrews

TI__Intellectual 1640 points

Hi,

This is what I want to ask, whether REF pin of TMCS1100 could be floating?

0 Carolus Andrews over 4 years ago in reply to Miles Li1

TI__Mastermind 22560 points

Miles, this is the answer I provided above, is there another aspect of the REF pin you are looking for here? As I mention above, you cannot leave the REF pin floating and expect proper device operation. It must be driven to a known state for proper operation.

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