PIC AD conversion timing error

[ghattas.akkad]

hello
i am having trouble with the AD conversion timing i have set the ADCON2 register to use the RC oscillator
PIC18f4520

ADCON2 = 0b10001011;

but i keep having the following error on proteus simulator
(shown in the picture)

 

[Roll No Three]

This may help you.
https://www.edaboard.com/threads/277233/

 

[embpic]

refer the datasheet for ur pic in which in ADC section they mention the given A/D Acquisition Requirements where u will get ur answer and on that basis use the time

 

[ghattas.akkad]

This may help you.
https://www.edaboard.com/threads/277233/

thank you i fixed it for the current speed 4MHz

- - - Updated - - -

refer the datasheet for ur pic in which in ADC section they mention the given A/D Acquisition Requirements where u will get ur answer and on that basis use the time

yes i did that and fixed it for the current speed
but on 48Mhz i used the F/16 to get 3MHz then the T=0.33 and i used taq*6 to get 2us
but the error is still shown

 

[embpic]

try out with maximum time