difficulty in configuring TMS320F28335 ADC

Hi Ashish,

ashish ahir said:

1)what will be scaling factor of ADC for TMS320F28335?

ashish ahir said:

2)what is continuous mode in ADC?

Both of the info is very well present in ADC User Guide. Please refer the same:

Regards,

Gautam

i have taken (3/4096) as described in datasheet. but still i am not geting expected result.
is scaling factor correct?

1)i want to measure 60V P2P AC.
2)resistor devider factor is (0.244/52). which gives 0.2815 p2p. that is input to ADC channel.
3)i tried graphing both ADC and ADC mirror resisotr.
4)None of the graph gives sine wave shape,which is expected.

ashish ahir said:

3)i tried graphing both ADC and ADC mirror resisotr.

Using CCS Graph utility?

ashish ahir said:

4)None of the graph gives sine wave shape,which is expected.

If CCS graph then you'll never observe a sine wave as the variable refresh and the graph refresh rates don't match.

What we would like to know is if input 0.2815 analog value do you get your ADCRESULT value ie digital value around 384? You can observe the same on Watch Window.

Regards,

Gautam

1)yes,using CCS graph.
2)yes,i am getting that 384 value.