LTC2497 Differential reference

With IN- biased at 1.25V the input range for IN+ would be 0V - 2.5V.

I have attached my schematics as well. Appreciate if you could point out my error.

Thank you.

Hi ghoover

I managed to get the voltage reading for anything below 2.5v. Anything above 2.5v gives me "11" and the reading is out of range. Any possible thing i could have missed?

1. We are driving a E-Load. Battery voltage 3.3V.

2. Vss = REF+ = 5V from USB

3. REF- = 5V from USB / 2

4. Applied input voltage = 5v

5. Output code by ADC: 1111111100000111000000

Thanks! 

I measured the REF+ and REF- its at 4.799v and 0v.

Look at the -input. From your description, it is probably tied to ground instead of REF/2.

Hi..I tired the -input to Ref/2 on the PCB. I used the original linduino code and it works perfectly. Could it be any other issue during my decoding process?

I am not a programmer. I can only suggest that you compare the Linduino code to your code and see what differences there are.

I am not a programmer. I can only suggest that you compare the Linduino code to your code and see what differences there are.