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.