sanjeev kumar wrote:
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My question is there any code of conduct for the manufacturers to follow before publishing datasheets??

Absolutely none.

As a general rule, read the "minimum-typical-maximum" values, and whichever is the worst version of the parameter, believe that one.

Also. DAC and ADC makers TELL LIES.

Also American semi manufacturers tend to have rather exaggerated claims. Except Analog Devices. If they state a parameter, I have found that they mean it,

Steve