help with adc tester

crutschow

Joined Mar 14, 2008
38,400
The data sheet has a very large number of specified parameters.
Mike is asking which of those do you want to test for?
Testing all of them would require a bench full of expensive test gear and hours of test time.
 

crutschow

Joined Mar 14, 2008
38,400
That doesn't answer out question.
You are just repeating your original question.
Do you just want to do just a basic functional test?
 

crutschow

Joined Mar 14, 2008
38,400
One way to do that test is to use a DAC that has more bits resolution and an error must less than 1 LSB of the ADC value (say 1/10th or less) to provide a test voltage.
The output of the DAC goes to the input of the ADC.
Then you digitally increase the output of the DAC from 0V to full-scale using a microprocessor while monitoring the digital output of the ADC.
From that the microprocessor can calculate the deviation of each output bit's error from the ideal.
 

Thread Starter

hamed_azhar

Joined Feb 24, 2015
10
One way to do that test is to use a DAC that has more bits resolution and an error must less than 1 LSB of the ADC value (say 1/10th or less) to provide a test voltage.
The output of the DAC goes to the input of the ADC.
Then you digitally increase the output of the DAC from 0V to full-scale using a microprocessor while monitoring the digital output of the ADC.
From that the microprocessor can calculate the deviation of each output bit's error from the ideal.
Do you have the circuit diagram for this?
 

Thread Starter

hamed_azhar

Joined Feb 24, 2015
10
No. That would depend upon the ADC you want to test, the DAC you want to use, as well as which microprocessor will control the testing.
Are you familiar with microprocessor programming?
I want to test adc0804, but i dont know about which dac and microprocessor should be used. Also, I am not familiar with the programming too. Can i use microcontroller instead?
 

Thread Starter

hamed_azhar

Joined Feb 24, 2015
10
I want to test adc0804, but i dont know about which dac and microprocessor should be used. Also, I am not familiar with the programming too. Can i use microcontroller instead?
No. That would depend upon the ADC you want to test, the DAC you want to use, as well as which microprocessor will control the testing.
Are you familiar with microprocessor programming?
Can i chat with u online?Because its a very urgent matter. My email id <snip>

Edit: email address removed to prevent exploitation by spammers.
 
Last edited by a moderator:

crutschow

Joined Mar 14, 2008
38,400
It's best to continue in this thread so everyone can contribute and benefit from the discussion.

A microcontroller requires the same programming expertise as a microprocessor.

It likely would be easiest to use a USB acquisition module such as this, and do the calculations, measurement, and control using a PC.
 

Thread Starter

hamed_azhar

Joined Feb 24, 2015
10
How to program PIC microcontroller to use it as DAC ? Given set of digital inputs, I have to convert each of them to analog voltages with some specific equal time periods?
 

crutschow

Joined Mar 14, 2008
38,400
How to program PIC microcontroller to use it as DAC ? Given set of digital inputs, I have to convert each of them to analog voltages with some specific equal time periods?
"How to program PIC microcontroller" is a long tutorial that can't be done here.
Suggest you Google "PIC tutorial" for more info.
 
Top