| ??? 06/21/07 16:26 Read: times |
#141138 - ADC0804 and analog mux 4051 help |
Hi, I'm trying to interface an ADC0804 with my 8051 trough an analog mux CD4051, but i have some trouble, how much time I need to wait between each input port change and the start of conversion?
I'm testing it here with potentiometers, but one potentiometer slightly change the value of another. The common port of CD4051 is connected to ADC0804 input. ADC0804 output is connected to P2. P1.0...P1.2 is connected to CD 4051 address input. P3.4 to ADC WR P3.5 to ADC INTR P3.3 TO ADC RD Thanks. |
| Topic | Author | Date |
| ADC0804 and analog mux 4051 help | 01/01/70 00:00 | |
| Source impedance driving the CD4051? | 01/01/70 00:00 | |
| what is "Source impedance driving"? | 01/01/70 00:00 | |
| Source impedance | 01/01/70 00:00 | |
| RC | 01/01/70 00:00 | |
| I'm using just 10K pots | 01/01/70 00:00 | |
| I would wait 3.5µsec | 01/01/70 00:00 | |
| Using a multiplexer | 01/01/70 00:00 | |
| Crosstalk/Interacting is the problem, need help | 01/01/70 00:00 | |
| Do you use buffers? | 01/01/70 00:00 | |
| No, just pots connected to inputs of 4051, my code | 01/01/70 00:00 | |
| Why add complexity? | 01/01/70 00:00 | |
To make it work?? | 01/01/70 00:00 |