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Science Forum Index » Electronics - Misc Forum » interfACING 8051 WITH adc
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| gautham |
 Posted: Wed Jan 10, 2007 12:22 am |
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Guest
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hi,i am working on a project where i have to interface a
microcontroller with
an adc & an rf transceiver
the data input to the microcontroller comes
from a 220v, 50Hz power line,representing the power flow,voltage
etc.this analog data is interfaced with the microcontroller with an
adc.the frequency of the signal being less,any frequency on the upward
of 1MHz would work very fine.the resolution that i want is in the order
of a few hundred millivolt.therefore,i am planning to use a 14 bit
adc.my question is regarding the hardware interfacing of this adc with
the microcontroller. for example,how do i tune the microcontroller to
the frequency of the adc?.i am planning to
use an atmel product.what series would be best for my
project?microcontrollers with inbuilt ADC'S are also fine.would the
results be accurate?the rf segment
is to connect the microcontrolller wireless to a remote host computer,
where detailed analysis of the data would be done. |
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| Guest |
| Posted: Wed Jan 10, 2007 2:00 am |
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gautham wrote:
Quote: hi,i am working on a project where i have to interface a
microcontroller with
an adc & an rf transceiver
the data input to the microcontroller comes
from a 220v, 50Hz power line,representing the power flow,voltage
etc.this analog data is interfaced with the microcontroller with an
adc.the frequency of the signal being less,any frequency on the upward
of 1MHz would work very fine.the resolution that i want is in the order
of a few hundred millivolt.therefore,i am planning to use a 14 bit
adc.my question is regarding the hardware interfacing of this adc with
the microcontroller. for example,how do i tune the microcontroller to
the frequency of the adc?.i am planning to
use an atmel product.what series would be best for my
project?microcontrollers with inbuilt ADC'S are also fine.would the
results be accurate?the rf segment
is to connect the microcontrolller wireless to a remote host computer,
where detailed analysis of the data would be done.
14 bits is impossible, 12 bits is nearly impossible, at your skill
level 10 bits is just possible. Stop dreaming and write a real spec. |
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| CWatters |
| Posted: Thu Jan 11, 2007 3:25 pm |
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Guest
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"gautham" <gautham01986@gmail.com> wrote in message
news:1168402972.705521.323900@i39g2000hsf.googlegroups.com...
Quote: .my question is regarding the hardware interfacing of this adc with
the microcontroller.
Which ADC are you using? The info you need will be in the data sheet for the
ADC.
Quote: for example,how do i tune the microcontroller to
the frequency of the adc?
Some ADC are designed to be triggered by the micro. eg the micro sends a
"start conversion" signal. Some time later the ADC responds with a
"conversion done" signal. You can have the micro poll that input or connect
it to an interrupt. Micros with built in ADC frequently allow you the
choice.
Quote: ...would the results be accurate?
There are probably at least half a dozen potential sources of error in such
a system. If you don't know what those sources of error are and how to
minimise them then I suggest this project is probably beyond your current
abilities. Sorry. |
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