| ??? 11/30/07 04:39 Read: times |
#147613 - ok, let me ... Responding to: ???'s previous message |
Erik Malund said:
I would make Rfix out of two resistors in series with opposite tempcos,Thus, the only thing affection your precision will be Rfix which you will need anuhow, the error from Vref has disappeared. Erik Great topology , I assume "vsomething" above is the voltage signal from sensor after conditioning.Actually I am confused with the statement "whatever Vsomething is (cheap reference) ". Opposite tempcos its meant that one resistance with 100 ppm/°C and other say 20ppm/°C .But the two never being same ,does that has to be done delibrately ?. APC |
| Topic | Author | Date |
| Cygnal/Silabs MCU Adc reference | 01/01/70 00:00 | |
| WHICH? | 01/01/70 00:00 | |
| WHICH? | 01/01/70 00:00 | |
| Research? | 01/01/70 00:00 | |
| Research? , yes you are right | 01/01/70 00:00 | |
| Maxim, AD, LT | 01/01/70 00:00 | |
| thanks | 01/01/70 00:00 | |
| Tall order | 01/01/70 00:00 | |
| REF3225 == The price of F206 :( | 01/01/70 00:00 | |
| What kind of sensor? | 01/01/70 00:00 | |
| go relative | 01/01/70 00:00 | |
| go relative | 01/01/70 00:00 | |
| ok, let me try | 01/01/70 00:00 | |
| ok, let me ... | 01/01/70 00:00 | |
| explaining | 01/01/70 00:00 | |
vsomething | 01/01/70 00:00 |