Hi,
I need a low noise DAC for a precision low-frequency (<500Hz) application, resolution >= 16 bits, 3.3V, SPI
I am thinking of using the LTC6655BHMS8-2.5 as a reference, but trying to find a DAC that doesn't swamp its 400nVpp low frequency (0.1-10Hz) noise is difficult.
In your product selector guide the LTC2641 is shown as a low noise DAC but its datasheet doesn't provide much information on noise, what is its 0.1-10Hz peak-peak noise?
Is there a lower noise output part that you can suggest?
(The AD5780 has 1.1uVpp typical)
Many thanks,
Dominic
I see the AD5512 (134uVpp) is a good choice but I cant compare its performance vs LTC2641 as the LTC datasheet is missing this information, any chance you can please post it?
Many thanks
Hi Dominic,
Please have a look at AD5791, a 20-bit part with 0.1-10Hz noise similar to AD5780.
The EVB of this part has a daughter board option which uses LTC6655 and LTZ1000.
https://www.analog.com/media/en/technical-documentation/user-guides/EVAL-AD5791SDZ-UG-1152.pdf
Cheers,
Ivan
Thanks for the reply.
The AD5791 is 1.1uV i.e. much worse than AD5512The AD5541/AD5542 seem to also be a possible choice
Thanks