I think this might be a bit of a stupid question, but I've got a bit of mental block on it.
I'm trying to power a CA3140 op-amp. I have a 12V source, and an AMD660 inverter to provide the negative voltage.
However, when I connect the negative supply pin of the op amp to the pin to the output pin of the ADM660 inverter, the voltage reading on the ADM660 output goes to a few hundred (positive) mV instead of -6V(ish) it should be. Obviously the output of the op-amp does not descend into the negative region.
I've tried placing various resistors in series with the output of the ADM660 to reduce the current as it was fairly high, but this just results in a voltage drop across the resistor, and still leaves a positive voltage on the op-amp pin. What should I be doing? I feel like I'm missing something easy here, sorry if it's really obvious, I'm fairly new to electronics.