Hi Jonas, Unfortunately measuring the voltage at the reference resistor does not tell you the settling time of the IDAC current but rather the settling time of the reference voltage. The reference current will settle very quickly and you would have to measure this with an inline current meter of high precision to verify. I can't give you a precise settling of the reference voltage as this will be system dependent. If I know your exact setup I can try to duplicate. Along with your schematic would it be possible for you to take a few pictures of your setup for duplication. Some other considerations is the reference resistor, the value of the resistor and the connection to ground. If the reference resistor connection to ground is high impedance (inductive for example) the spike in current when the IDAC is turned on will be loaded across the inductance. If the connection has an increased resistance to ground, then the settling time will be increased. If you replace the resistor with a small value and you see a decrease in reference voltage settling time, then this would be an indicator of capacitance causing the delay. Best regards, Bob B
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