I am planning on using the AD9726 for a design since it seems to provide the lowest noise performance of an DAC that needs to run at 40MHz (seems like if I need to run at over 10MHz, I need to use a part that is capable of running at a lot more than 40MHz).
The datasheet doesn't seem to be the most complete, as it seems to lack some text in certain sections that other Analog datasheets seem to have, but the main issue is that I can't find a number relating to the PSRR (Power Supply Rejection Ratio) or something similar.
Is there any information on this?
We did not characterize PSRR on the AD9726. The AD9707, AD9717 or AD9117 may be of interest to you. These do have PSRR specs.
Hmm, all those seem to be 14 bit DACs.
1)Is there anything in a 16bit DAC?
2)How should I estimate the PSRR of the AD9726? We talking 80dB here, 60? 75? There has to be a worst case estimate from Analog?
The AD9747 is a 16 bit DAC that would work for you. It too does not have a PSRR spec.
I don't know of a way to estimate power supply rejection in Tx DACs. The power supply rejection characterization we've done products that have that spec is not an AC test. We varied the AVDD voltage over is specified DC range and measured the effect on IOUTFS (DAC gain). The spec is in % of FSR/Volt. The characterization was done on a hundred or so devices.