How to measure SFDR of DAC

[bgpradeep]

Hi,

I would like to know how the SFDR is measured while simulating DAC
after layout.

Thanks

 

[nxing]

you do the post-layout simulation and then you can use FFT to get your SFDR, I guess.

 

[mitgrace]

Hello , Do you using sin code for input . If you input 1MHz signal of digital . Then the DAC out ,you can get the sin wave . Then do FFT .,that you can get the SFDR .

 

[jeniffer]

you can use fft for the DAC output .you can search some programme materials from the ADI application notes

 

[pfd001]

You can use the FFT and get the SFDR by excluding the harmonic signal power

 

[windgone0204]

hi, i am design a current steering DAC(10_bit 100MHz), but i don't know how to simulate th

ac characteristics of the DAC,can u tell me how to solve it?my email is

windgone0204@yahoo.com.cn

ps:i get the digital code of a sin from spice exoplorer and get the DAC output sin

signal.but don't know how to do next.

for example, i input a sin signal of 10MHz vs 100MHz samlpe clk,so the DAC output is no

perfect as the signal is sampled 10 times every cycle.when i analyse the DAC output with

FFT, the result is neglect?can u tell me why?thanks a lot.