Timeline for Best way to attenuate R2R DAC output?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 19, 2018 at 23:40 | comment | added | Spehro 'speff' Pefhany | You should solve the system of two equations. The number of bits doesn't matter except that you need to adjust it a little if you care about the difference of one LSB. | |
| Jun 19, 2018 at 23:25 | comment | added | Connor Spangler | For clarification, this would be for a 3-bit DAC specifically, but I'm also interested in developing an equation (set) for n-bit DACs. | |
| Jun 19, 2018 at 22:51 | comment | added | Connor Spangler | That makes sense, thanks! I'm having trouble putting together equations to calculate values for R and Rx... We know (R*Rx)*(R+Rx) = 75, and Vout_max = 3.3*(7/8) = 2.89 V. We need Vout_max = 0.70 V. We have a system of two unknowns here, so do I just have to trial and error values? | |
| Jun 19, 2018 at 22:26 | comment | added | Spehro 'speff' Pefhany | The parallel combination of R and Rx = R*Rx/(R+Rx) | |
| Jun 19, 2018 at 21:52 | comment | added | Batperson | Could you please clarify R||Rx? | |
| Jun 19, 2018 at 21:42 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 4.0 |