| ??? 10/01/10 19:50 Read: times |
#178846 - irrelevant Responding to: ???'s previous message |
Erik Malund said:it is a reference voltage reduction having the same effect.
Actually I am not 'loading' the internal referance by using it for outer ciruit. for external ckt i have an other 2.5V referance. irrelevant, ANY reference voltage is divided by 16 when you set this thus your reference is 2500/16 ~150mV i.e. full count is 150mV the noise level does not surprise me. I do not remember your chip but if it is 4096 full count then 1sb is approx 40uV and it takes extreme care to design with that low a level of noise Erik |
| Topic | Author | Date |
| Si-lab MCU ADC : unstable gain? | 01/01/70 00:00 | |
| two things | 01/01/70 00:00 | |
| Re:two things | 01/01/70 00:00 | |
| irrelevant | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| It will be easier... | 01/01/70 00:00 | |
| Plotted data and checked pattern? | 01/01/70 00:00 | |
| external amplifier working good | 01/01/70 00:00 | |
| Choosing an opamp | 01/01/70 00:00 | |
pretty cool! | 01/01/70 00:00 |