Other Parts Discussed in Thread: TMS320F280049C
Hi Team,
I am using TMS320F280049c for current reading. Below are some setup details:
1. For board I am enabling DAC which uses internal ADC voltage reference.I am putting DAC count 1000 and I am getting 0.65V at output.
using formula DAC voltage out = ( DAC count * DAC ref / 4096)
2. Now i am enabling PGA and ADC module with gain x3. and connecting DAC out to PGA input.
and PGA count we received is ~3200 . so using that we get to know 2.5 is ref
3. Now I am enabling generic ADC module and connecting DAC out to ADC input. But count i am getting is 2300 . so formulated i am getting 1.25 ref. I have set internal ref for ADC.
Que :- 1. Why i am getting different ref voltage for PGA and ADC module.
