| ??? 01/09/07 09:13 Read: times |
#130480 - Offset compensation Responding to: ???'s previous message |
Is there such a thing as adjustable input offset? IE: during the zero'ing process, I would like to "adjust" one signal to equal that of the other. Is this typically how such a condition is handled?
Yes. However, I am not aware of an ADC that offers the possibility of using one signal as the "zero" for the other directly. You may have to record the difference "manually" and subtract the offset from the second signal. Of course, if the two sensors also have a different gain, things get more complex. Analog Devices has several derivatives in their ADuC product line that offer 24 bit ADCs ... some of them even have dual 24 bit ADCs, so you don't have to deal with switching the input channel. However, even with 24 bits of resolution, you'll only achieve ~14-15 bits of precision. |
| Topic | Author | Date |
| Analog Interface - Input Offset Clarification | 01/01/70 00:00 | |
| Instrumentation amps | 01/01/70 00:00 | |
| Interference and reference | 01/01/70 00:00 | |
| Absolute vs ratiometric | 01/01/70 00:00 | |
| Offset compensation | 01/01/70 00:00 | |
| Self-Zero'ing | 01/01/70 00:00 | |
| I would be wary of 24 bits of anything with an ADC | 01/01/70 00:00 | |
| Offset compensation | 01/01/70 00:00 | |
| ADuC | 01/01/70 00:00 | |
| Difference is offset. Not gain | 01/01/70 00:00 | |
| Another approach. | 01/01/70 00:00 | |
| Noted | 01/01/70 00:00 | |
| the ususal mistake | 01/01/70 00:00 | |
| A typical thread... | 01/01/70 00:00 | |
| To Kai | 01/01/70 00:00 | |
offset compensation | 01/01/70 00:00 |