mcoster
Member level 2
8051 and tlc549
Hi, i was wondering if anyone has used those ADC and could help me.
I have problem understanding how to use this ADC.
I think i did what they said in timing diagrams and operation theory but i dont get a stable reading. For example, if i am measuring 2.5 V i get reading in the 2.0 V to 3.2 V range ? Is this normal in serial ADC ? I don´t think so.
So i am asking for help.
Here is what i am doing.
CS = 0
Wait a little (2 us)
I do 8 clock cicles (to get out the previous data and start the hold operation)
CS = 1
Wait a little
CS = 0
Get the first bit (msb)
clock
Get the second bit
clock
and go on until the eigth bit
Clock
CS = 1
Thanks for your help
mcoster
Hi, i was wondering if anyone has used those ADC and could help me.
I have problem understanding how to use this ADC.
I think i did what they said in timing diagrams and operation theory but i dont get a stable reading. For example, if i am measuring 2.5 V i get reading in the 2.0 V to 3.2 V range ? Is this normal in serial ADC ? I don´t think so.
So i am asking for help.
Here is what i am doing.
CS = 0
Wait a little (2 us)
I do 8 clock cicles (to get out the previous data and start the hold operation)
CS = 1
Wait a little
CS = 0
Get the first bit (msb)
clock
Get the second bit
clock
and go on until the eigth bit
Clock
CS = 1
Thanks for your help
mcoster