| ??? 05/02/05 08:37 Read: times |
#92706 - Assumptions wrong. Responding to: ???'s previous message |
Prahlad J. Purohit said:
In most of the designs we assume approx 40 C variations in the temperature. This 40 C will cause approx. 100*40 = 4000PPM error that is 0.4% and this 0.4% is enough to disturb even 8bit design what about 10bit or 12bit things. Prahlad, You are making an absolutely worst case drift assumption. By proper design, you can usually significantly reduce the effects of temperature to much smaller values by using components which track each others drift and compensate using differential properties of the signals. Of course, ultimately there is one component that may prove critical, like the main voltage reference. Steve |
| Topic | Author | Date |
| WEOT: Signal Conditioning the right way. | 01/01/70 00:00 | |
| Calibration | 01/01/70 00:00 | |
| Re: Caliberation. | 01/01/70 00:00 | |
| Assumptions wrong. | 01/01/70 00:00 | |
| Re: Wrong Assumption. | 01/01/70 00:00 | |
| Tracking the offset. | 01/01/70 00:00 | |
| re:drift | 01/01/70 00:00 | |
| Drift compentsation | 01/01/70 00:00 | |
| Track the drift | 01/01/70 00:00 | |
| another track | 01/01/70 00:00 | |
| Signal conditioniong | 01/01/70 00:00 | |
| Choosing precision parts is the remedy | 01/01/70 00:00 | |
| Re: Choosing precision parts. | 01/01/70 00:00 | |
| Ratio is important | 01/01/70 00:00 | |
| wikipedia for op-amp | 01/01/70 00:00 | |
power supply noise | 01/01/70 00:00 |