Does anyone know what the output current of the LTC1668 DAC is after a power cycle?
I can't find it anywhere in the datasheet.
The LTC1668 does not have a power on reset circuit that will force a know state at start up. The output will be somewhere between 0 and full scale until the first clock edge latches the data from the inputs. If this is a concern, use the reference voltage to minimize the level until you have a chance to clock in a known voltage. Since the part is straight binary and bipolar, 1000 0000 0000 0000 is midscale, or zero current.