| ??? 01/25/08 12:29 Read: times |
#149946 - no,yes Responding to: ???'s previous message |
http://www.atmel.com/dyn/resou...oc4126.pdf
page 126: VAREF should be connected to a low impedance point and must remain in the range specified VAREF absolute maximum range (See section “AC-DC”). . If the ADC is not used, it is recommended to tie VAREF to VAGND. ADC range is defined by VAREF. So power VAVCC and VAREF with 3V (VAREF max=3V) Note that VCC>=3V. Use voltage supervisor for reset below 2.8V. |
| Topic | Author | Date |
| Atmel T89C51CC02: ADC reference voltage | 01/01/70 00:00 | |
| No, unless you mean VAVCC | 01/01/70 00:00 | |
| VAVCC usable as ADC reference voltage? | 01/01/70 00:00 | |
| Datasheet says that you can | 01/01/70 00:00 | |
| 'can" "should' and 'good' are 3 different words | 01/01/70 00:00 | |
| varef is specified 2,4...3V range | 01/01/70 00:00 | |
| but not if you want any precision | 01/01/70 00:00 | |
| why not | 01/01/70 00:00 | |
| Well, I have yet to see any VCC that ... | 01/01/70 00:00 | |
| Does that mean... | 01/01/70 00:00 | |
no,yes | 01/01/70 00:00 |