| ??? 01/11/10 15:04 Read: times |
#172345 - Thoughts... Responding to: ???'s previous message |
Does the supply voltage of ADC or any other pin show fluctuations, when ALE goes high?
What happens if you put a 100nF cap from ADC input to signal ground? Gopal said:
I am using the same hardware and same chip. Only the controller is changed. Controller sits on a separate board thand ADC. That might not be a good idea. If the signals from the micro show steep edges you could have ringing at the ADC side resulting in mad performance. Show us a schematic of your circuit. Kai Klaas |
| Topic | Author | Date |
| ADC0809 problem | 01/01/70 00:00 | |
| Is the very same ADC chip in both cases? | 01/01/70 00:00 | |
| From time to time... | 01/01/70 00:00 | |
| Datasheet read, same hardware | 01/01/70 00:00 | |
| Define 1000000000% | 01/01/70 00:00 | |
| Thoughts... | 01/01/70 00:00 | |
| Solved partially | 01/01/70 00:00 | |
| So the cap did help? | 01/01/70 00:00 | |
| RE: That cap did help? | 01/01/70 00:00 | |
| The input multiplexer is damaged! | 01/01/70 00:00 | |
| Discharge diode | 01/01/70 00:00 | |
| RE: The input multiplexer is damaged | 01/01/70 00:00 | |
| Indeed, a very poor design!!! | 01/01/70 00:00 | |
RE: Indeed, a very poor design!!! | 01/01/70 00:00 |