its 500mA total (250mA per channel). Basically the input is at rail voltage at rail impedance.
I don't expect a op-amp input to go to -14V or whatever with basically no limiting. I thought a electrolytic capacitor was shorting, I could not believe it was the 50 ohm resistors on the input..................
yeah they are pissing me off I think hiding something proprietary. i think i can do this with other chips that I trust more.
I don't think I want to try again because its expensive
for the negative voltage, maybe I can try to probe it under the socket with a grabber hook to make sure the socket is not mesed up. I know the socket pin is getting the voltage. Its new and looks good.
But the only way it could provide 250mA from a INPUT to a ground impedance setting resistor is through some kinda unlisted diode right? The base of the input transistor would have to be sourcing alot of power. I thought itt could only source 0.5 micro ampers.
oh yeah, its from the negative rail. because the negative side of PSU was reading 0.47 amps with the input resistors connected to ground. So the negative rail is coming out of the inputs. if I remove the chip from the socket, there is no voltage on the inputs BTW. I am not soldering anything. I don't think it could be a bridge. I also don't have bolts on the chip, so its not flexing anything to cause some weird short or whatever, and its o nly a 2 layer PCB
i wonderi f its possible the socket is messed up and the positive rail is floating??