SA636 circuit funtion - What is the purpose of the cap?

Status
Not open for further replies.
R

robismyname

Full Member level 6
Joined
Jan 17, 2008
Messages
390
Helped
11
Reputation
22
Reaction score
9
Trophy points
1,298
Location
Central Florida
Activity points
4,603
application note sa636

On page 11 of the SA636 datasheet pin #9 is labeled "DATA". There is a capacitor C8 with a value of 1uF. My question is what would be the actual value of Xc?

What is the purpose of this cap?
 

SA636 circuit funtion

To AC couple the data signal
 

Re: SA636 circuit funtion

E-design said:
To AC couple the data signal
Click to expand...


So this is behaving as a high pass filter. Why would I want to strip away the low frequency content of the signal? What is the benefit?
 

Re: SA636 circuit funtion

This signal needs to be coupled to outside circuits which may have different DC conditions. That is why the application note shows a DC blocking cap. The data will be pulses that pass easy through this cap.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…