Sujet : Re: AD5791
De : jeroen (at) *nospam* nospam.please (Jeroen Belleman)
Groupes : sci.electronics.designDate : 04. Jun 2024, 20:53:13
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v3nr7c$ibi4$1@dont-email.me>
References : 1
User-Agent : Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0
On 6/4/24 19:48, john larkin wrote:
https://www.analog.com/en/products/ad5791.html
That's an amazing part. 20 bit DAC with 1 PPM accuracy and 0.05 PPM
per degree C tempco.
My main gripe is its 3.4K output impedance, which makes a lot of
Johnson noise. I suppose I could run a bunch in parallel.
But you can power the chip from +/-16V and the LSB can be in
the 25uV ballpark. The Johnson noise of 7.5nV/rtHz doesn't
seem so bad then, does it?
Jeroen Belleman
AD5791
Re: AD5791