pelek

Hello. I'm testing AOUT module, and I don't have the same voltages on all 8 channels. I'm using for 10k Rx resitor, precision ones with 0.1% tolerance (and I picked by hand the same values from a lot). But even with the same resistors, one chanell gives me 1.0v-2.1v-4.2v-8.4v, one 1.1v-2.3v-4.6v-8.8v, one 1.0v-1.98v-3.8v-7.8v etc. Any suggestions ? I should test many TL074's until I find the right ones ? Thank you.