Hello, I was looking for some sort of chip/IC that would accept a digital input of say 4-5 bits and that would adjust an output current. I am looking to have a +/-3.3mA current applied to a resistive load. It would also be helpfull (for testing purposes) if I could adjust the inputs so that I could get a resolution of .1mA. The final project will be set somewhere between 3-4mA. I have tried using LM317 regulators as well as just a constant voltage through a 1% resistor. These don't provide quite steady of a current out for me. Also, because the positive and negative sides aren't directly linked, they tend to drift a little. Any ideas?