| ??? 10/15/08 09:29 Modified: 10/15/08 09:32 Read: times |
#159075 - As long as... Responding to: ???'s previous message |
...the common mode voltage at the ADC input does not exceed Vref, nothing has to be changed. If it does, on the other hand, the clamp should be changed to an active clamp, limiting the signal to +AV (which is =Vdd usually). That is because the ADC accepts a common voltage range of up to +AV. Between Vref and +AV the shown clamp is already working, resulting in distortion and reading errors.
If you keep your input signals in the range -10V...+10V, nothing has to be changed. Kai |
| Topic | Author | Date |
| Analog input signal conditioning | 01/01/70 00:00 | |
| voltage follower | 01/01/70 00:00 | |
| Good link that.. | 01/01/70 00:00 | |
| Wont work | 01/01/70 00:00 | |
| It should have been +/- 15V | 01/01/70 00:00 | |
| Excel automates resistor calculation | 01/01/70 00:00 | |
| Thanks. | 01/01/70 00:00 | |
| I would eventually omit the input buffers... | 01/01/70 00:00 | |
| Now that is worrying.. | 01/01/70 00:00 | |
| What I meant... | 01/01/70 00:00 | |
| Inputs swapped | 01/01/70 00:00 | |
| Extremely sorry for the goof up. | 01/01/70 00:00 | |
| Some hints... | 01/01/70 00:00 | |
| Just in time... | 01/01/70 00:00 | |
| As long as... | 01/01/70 00:00 | |
| Yes I understand. | 01/01/70 00:00 | |
Active clamp... | 01/01/70 00:00 |