Is there more noise data for 1KΩ DigiPots than the 1KHz spot noise spec in the data sheets? For example, the AD5253 (1K) shows 3 nV/√Hz at 1KHz which makes sense for a pure resistance in the neighborhood of 1KΩ. I am interested in the region of 0.1Hz to 100Hz. Since the devices are not simply resistors but semiconductors, is there 1/f noise? If so, has it been characterized? Any data?
BTW, with such low noise, these devices might be attractive as programmable attenuators for low level signal processing. The noise in multiplying DACs is rather high. IMHO.