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Is there an internal pull up on the disable pin (#27) on the AD8145?

Question asked by -=Steve=- on Mar 16, 2017
Latest reply on Jun 22, 2017 by Gauzz

Hi,

 

We've used an old schematic symbol for the ad8145 which was missing the power down pin (#27). Consequently we have a number of boards without an external pull up resistor. We haven't seen any issues on ~80 units to date and measuring a couple of boards I consistently measure ~71k ohms between pins 27 (Power down) and 20 (Vs+).

 

Is there an internal pull up resistor on the power down pin (#27)?

 

Thanks

Steve

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