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Problem with ADM13305-4ARZ

Question asked by rkn on Jan 3, 2015
Latest reply on Jan 5, 2015 by rkn

Hi,

 

I'm using the ADM13305-4ARZ supervisor and I've a problem with it.

I want to sense the voltages 3.3V and 1.2V. Therefore, I connected the 3.3V to SENSE1 and the 1.2V via a voltage divider:

 

+1.2V

  |

47K

  |

  |-------SENSE2

  |

47K

  |

GND

 

This configuration is not working.

The ADM starts toggling the reset lines. I already checked the soldered connected, resoldered them etc. No success.

The voltages seem to be stable. Checked that already with my scope.

The only way to get a stable reset line is to remove the resistors and connect SENSE2 directly to +3.3V of SENSE1 but that is of course not what I want.

Any ideas? Your help is very much appreciated!

 

Raphael

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