I am having trouble verifying the noise level in the AD780. I have an AD780BRZ mounted to a prototype PCB with 1uF ceramic input cap, 0.01uF ceramic cap on the TEMP output and an 10 uF ceramic output cap. I am using an HP Dynamic Signal Analyzer (yes, I am one of those "old analog guys") to look at the output in the frequency domain. I see about 15 uV @ 1 Hz. I thought I should see 4 uV. I tried removing the output cap expecting a rise in the noise, but the results are the same. I have found a newer, lower noise part - ADR441 that I have on order, but I wanted to ask about the AD780 just to close the loop. Any ideas? Thanks.