??? 11/07/04 18:53 Read: times |
#80617 - RE: The perfect design.. Responding to: ???'s previous message |
Prahlad said:
And all this on board design ignores component stability completely, which will dominate performance at these levels of precision. Not forgetting thermal gradients, thermo-emfs etc. etc. etc. Ok, but what is lost due to poor layout will be lost for ever and you need no longer to worry about 'thermal gardients'... By the way, even 8bit systems can heavily suffer from poor layout. Assume you get a 100mV spike on analog ground due to an unwanted digital ground return current, and this right then when ADC samples input voltage. Then even 6bit precision would be lost. Kai |