Hi;

I am working about a LPC824.

In UM10800.pdf at page 322 "Perform a single ADC conversion using a software trigger" it says that* The result of the conversion is (4095 x VIN)/(VREFP - VREFN). But I need to know why is that equation and not this other:*

The last one indicates a FS between Vrefp and Vrefn.

In this terms, the minimum LSB is:

Can someone help me?

Regards. Daniel.

For single end ADC input, the equation

(4095 x VIN)/(VREFP - VREFN)holds since this is a simple ratio metric ADC.Not sure how the equation with additional -VREFN comes into play.