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i am interfacing mcp3551 with 89c51. i have the problem that the count is not stable. i want the header file for mcp3551 with 89c51. please help me, its urgent.........
"i have the problem that the count is not stable"
How do you know that it's a software problem?
If the input to the ADC is not stable, then the output count will obviously not be stable either!
"i want the header file for mcp3551 with 89c51"
What do you want this header file to contain?
In what way would it be specific to an 89c51?
"its urgent"
As Erik suggests, this requires low-noise, high-precision, careful analogue design - that's not something that can be rushed!
thanks dear for ur reply. ok i have got the required software bug. but still my count is not stable.now can anyone suggest me any specific circuit through which i can get low noise. waiting for ur reply.....
"can anyone suggest me any specific circuit through which i can get low noise."
"this requires low-noise, high-precision, careful analogue design - that's not something that can be rushed!"
So, NO; nobody can just give you a quick, simple, specific, answer - it is a matter of skilled, careful, design.
Have you checked the Microchip website for design guidance?
Also look at the sites of other ADC manufacturers for their guidance - the techniques will be generally applicable.
And remember: it has nothing to do with Keil software tools!
www.8052.com/faqs.phtml
thanks dear for your reply, i have designed the circuit, from which i am geting the count different of about 5 to 10. i require 5 lakh count from ADC. i have used amplifier with 20 gain. now my input to the amplifier is about 2 to 5 mVolt. if i increase the gain noise problem comes and my count starts running. so can u help me to find a way to get 5 lakh count. waiting for ur reply....
Again!
Have you checked the Microchip website for design guidance? And the sites of other ADC manufacturers? And the sites of low-noise, high-precision linear IC specialists?
Do you have a decent textbook on analogue electronics?
Note that none of this has anything to do with Keil software tools - its all about analogue electronics!
do you have separate analog and digital grounds? do you ...?
read the references you have been give and FOLLOW THEM
Erik