| ??? 04/02/08 12:01 Read: times |
#152878 - Found a minor issue in hardware...not dealbreaker Responding to: ???'s previous message |
The bypass cap across the MPU was misrouted to the main bus ground instead of VDD to VSS directly, that got rid a some line spikes......didn't affect performance after the fact.
Also increase the LDO PS caps from reference spec and that also helped, now the noise floor is around 15mV on a 3.3V rail including switching and ripple. So not to bad for a Rev 1 design. I'll review all great advise here and see what works best, but overall everything is moving in the right direction! Thanks for all the help once again |
| Topic | Author | Date |
| Adding hysteresis on top of my sampling | 01/01/70 00:00 | |
| my method | 01/01/70 00:00 | |
| For this to work... | 01/01/70 00:00 | |
| adaptive delta ... ? | 01/01/70 00:00 | |
| All data is keep in eeprom | 01/01/70 00:00 | |
| What does the oscilloscope tell you? | 01/01/70 00:00 | |
| not a good ides | 01/01/70 00:00 | |
| Median filter ? | 01/01/70 00:00 | |
| are you using an RC low pass before the ADC? | 01/01/70 00:00 | |
| check here | 01/01/70 00:00 | |
Found a minor issue in hardware...not dealbreaker | 01/01/70 00:00 | |
| Low Pass Filter in Software | 01/01/70 00:00 |