[SOLVED] will tolerance will there for ADC

[Embedded Partner]

Hi,
can any one let me know whether tolerance will be present for adc or not. & please justify

 

[ckshivaram]

there will be tolerance in internal or external ADC. the manufacturer will specify it. you can find it in data sheet or in the application note of that device

 

[Embedded Partner]

there will be tolerance in internal or external ADC. the manufacturer will specify it. you can find it in data sheet or in the application note of that device

i am not able to find in my ADC i.e ADS7844
manufacturer is not mentioned anything about tolerance

 

[ckshivaram]

Ok.. tolerance in what operating voltage, resolution, which parameter...

ADS7844 pdf, ADS7844 description, ADS7844 datasheets, ADS7844 view ::: ALLDATASHEET ::: refer the 2 page of specification. he has given detailed explanation

 

[Embedded Partner]

means output digital data's tolerance from ADC
i hope it ll not be there . output digital data is always constant

 

[ckshivaram]

There will be LSB bit variation and change in digital output with variation in reference voltage, number of LSB bits modified and many many other parameters

 

[Embedded Partner]

yes there ll be lsb bit variation
and
if there is small change in input analog value will change in the digital output