The supply over one of the analog ports was changed to a LM7805 for both DAC's; nothing changed. I upload the wiring diagram
. On both DAC's VCC I have 4.96V.
If DAC is defective then both have to be defective since:
address(hex)=60 lookup=0 lookupWa=200 an.value=491 voltage=2.48
address(hex)=60 lookup=1 lookupWa=400 an.value=493 voltage=2.55
address(hex)=60 lookup=2 lookupWa=800 an.value=490 voltage=2.54
address(hex)=60 lookup=3 lookupWa=1000 an.value=492 voltage=2.42
address(hex)=60 lookup=4 lookupWa=2000 an.value=506 voltage=2.47
address(hex)=60 lookup=5 lookupWa=3000 an.value=732 voltage=3.65
address(hex)=60 lookup=6 lookupWa=4000 an.value=865 voltage=4.24
address(hex)=60 lookup=7 lookupWa=4095 an.value=876 voltage=4.24
address(hex)=60 lookup=0 lookupWa=200 an.value=511 voltage=2.48
after rerunning code for address 0x61:
address(hex)=61 lookup=0 lookupWa=200 an.value=514 voltage=2.43
address(hex)=61 lookup=1 lookupWa=400 an.value=518 voltage=2.55
address(hex)=61 lookup=2 lookupWa=800 an.value=521 voltage=2.42
address(hex)=61 lookup=3 lookupWa=1000 an.value=520 voltage=2.39
address(hex)=61 lookup=4 lookupWa=2000 an.value=506 voltage=2.47
address(hex)=61 lookup=5 lookupWa=3000 an.value=749 voltage=3.67
address(hex)=61 lookup=6 lookupWa=4000 an.value=881 voltage=4.32
address(hex)=61 lookup=7 lookupWa=4095 an.value=887 voltage=4.32
address(hex)=61 lookup=0 lookupWa=200 an.value=522 voltage=2.43
address(hex)=61 lookup=1 lookupWa=400 an.value=495 voltage=2.54
address(hex)=61 lookup=2 lookupWa=800 an.value=513 voltage=2.54
address(hex)=61 lookup=3 lookupWa=1000 an.value=521 voltage=2.52
address(hex)=61 lookup=4 lookupWa=2000 an.value=507 voltage=2.47
address(hex)=61 lookup=5 lookupWa=3000 an.value=748 voltage=3.57
address(hex)=61 lookup=6 lookupWa=4000 an.value=859 voltage=4.32
address(hex)=61 lookup=7 lookupWa=4095 an.value=797 voltage=4.22
I measure no voltage drop between GRN at 12V supply and at DAC's...