Ok, ready for OSHpark
OP updated
Progress: Tested signal chain using my old THT aout, all is good!
cool !
Don’t you need to add a diode (like a 1N4148) after the resistor after the 595 to protect it in case of putting a voltage on the cv/gate/trigger/clock accidentally ?
I’ve never done it and never had any problems. Adding a diode on the CV will mess up the tuning
1 hour ago, Altitude said:
I’ve never done it and never had any problems. Adding a diode on the CV will mess up the tuning
Hi
If you mean in series that’s for sure
But you can hook one diode at posV and one at 0V, will protect positive over voltage to posV+0.7V and negative over voltage to 0V-0.7V.
can be a safe move with bipolar supply component next to the DAC.
I have to admit I don’t do this with my Ain/Aout pcb design… Ain mpc3208 already have them integrated, don’t remember for the tlv5630
But I add at all Ain/Aout an RC filter, it improve jitter, in my use case at least.
Best
Zam
prototype boards are in and despite a DOUT order snafu, everything is working on the Jack board (the DOUTx3). Will try to stuff the AOUT board and have it tested this weekend..
Nice work!
yes , great stuff !
Yes, great work! I am interested in a PCB set.
You are the man! Still interested in a PCB/Panel set.
the corrected boards are on their way from OSHpark so next week I’ll finalize the testing
I was thinking down the road a bit and adding a DOUT/DIN header so you can expand that chain to euro TPD module..
Did I just hear TPD?
1 Like
Yep. We need to chat..
8 hours ago, Altitude said:
I was thinking down the road a bit and adding a DOUT/DIN header so you can expand that chain to euro TPD module..
Cool! Exactly what I need!
Ok, preliminary testing done for the Aout portion and seems to work. Need to calibrate and give it a work out.
and calibration is done. Tracks like a champ, within a millivolt from 1.000 to 8.000 V. Tomorrow, the workout
Also worth mentioning: I tested using bus power (+5V from the SEQ) and powering the +5 from the onboard supply and did not see any difference in noise on the scope. Oddly enough, the liner driver receiver gets pretty warm when powering it that way (it still gets +5 from the core regardless of how the other modules are powered). I’ll leave the headers on the boards but at this stage, I recommend everyone use the onboard +5V supply
23 minutes ago, Altitude said:
Tracks like a champ, within a millivolt from 1.000 to 8.000 V.
How is that possible with 12bit DAC ???
Best
Zam
0-10.68V by 4096 steps is 0.003V/ per step so it’s reasonable.
Maybe 1 millivolt is embellishing it a bit but its pretty close