What is SFDR(spurious free dynamic range) in ADC

[amitjagtap]

spurious free dynamic range

hi all,
I'm presenlty working on ADC project.
Anyboby, plz explain me the concept of SFDR & why should it have a large value in an ADC.

 

[safwatonline]

adc sfdr

ratio between the fundamental tone and the largest next tone

 

[hr_rezaee]

sfdr adc

Hi
It's a significant value in communication applications.

"Why is SFDR important in communications? Usually, the information being transferred shares the frequency spectrum/bandwidth with other communication channels and applications (for example, different television channels being broadcast or transmitted by a common cable, different callers in a cellular system, different FM radio stations, etc.) If a transmitter sends spurious signals into other frequency bands, they can corrupt, interrupt, or obliterate the neighboring signal(s). This is considered to be bad practice, is counter to the regulations of the FCC (and other regulatory bodies), and can lead to legal action. "

source: https://www.analog.com/library/analogDialogue/archives/30-3/dac.html
regards

 

[A.Anand Srinivasan]

spur free dynamic range

it is something similar to the noise floor... it is the range in which the distortion due to noise is acceptable...

 

[sangueda2007]

what is sfdr

Hi,

This is a ratio of required signal to largest harmonic of a system.

Lets say you have a sine wave genrtr, if you see the frequency domain response
you can see the required signal and its harmonics introduced because of system
nonlinearity.Now the ratio of that signal to the very next harmonic is SFDR assuming
there are no other harmonics present other thn above generated.

Hope this is clear to you.

Regards,
Sangamesh