Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What is SFDR(spurious free dynamic range) in ADC

Status
Not open for further replies.
amitjagtap

amitjagtap

Full Member level 5
Full Member level 5
Joined
Jan 10, 2007
Messages
304
Helped
42
Reputation
84
Reaction score
36
Trophy points
1,308
Visit site
Activity points
3,273
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.
 

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
 

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...
 

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
 

    amitjagtap

    amitjagtap

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top