• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 552 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCD3138: Analog Comparator

Steve McNish
Prodigy 120 points
Part Number: UCD3138

Hi all,

I have some questions about analog comparators. 

1. For 64 pin UCD3138, in pin #5 which is AD07, it's written as "Connected to comparator F and reference to comparator G". In this explanation, "reference to comparator G" statement is not so clear for me. Can you please make this a little bit more clear

2. Pin #8 which is AD03 is connected both comparator B and C. Does this mean that comparator B and C can not be used independently? As far as I understood, only one measured value such as output voltage, can be connected to AD03 and if I enable both comparator B and C, they both compare the measured value (Vout) with the corresponding reference values. If this is the case, what is the main purpose of placing two comparators in a pin?

I would be appreciated if someone helps me. 

Kind regards,

Steve

  • 0
    TI__Genius 13570 points
    Hi, Steve,

    AD07 can be the input of comparator G and then is compared to internal DAC reference; alternatively, it can be programmed as the reference input of comparator F, and the other input is from AD06.

    Comparator B and C share the same pin AD03, but they have different reference DAC and different configuration such as rise edge trigger or fall edge trigger, normally for UVP and OVP.

    Regards,
    Sean