ALM2402-Q1: Vpullup?

Thomas Bewley

Part Number: ALM2402-Q1
The datasheet makes reference (in a single location, afaik) to Vpullup. Is that set equal to Vcc (gain stage) or Vcc_o (output stage)? Context: I am contemplating putting an LED directly to ground on this pin, to indicate when the opamp is enabled (I.e., running , and without fault), but I am not sure that I can actually get this idea to work... thanks in advance for any advice!!

over 3 years ago

0 Marek Lis over 3 years ago

TI__Guru 61300 points

Hi Thomas,

Vpullup may be connected to either supply for as long as it is NOT above 5V - see below. Thus, if your Vcc and Vcc_o is above 5V, you must use another 5V supply.

I believe you should be able to drive LED from OTF flag (see below) BUT you must make sure that LED current is low enough so with Rpullup of 2.5kohm under normal condition OTF voltage stays above 1V.

0 Thomas Bewley over 3 years ago in reply to Marek Lis

Expert 1030 points

Cool, I'll give this a try. :)

thanks - Tom

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ALM2402-Q1: Vpullup?