Help with redundancy in conventional SAR ADC

J

jatin123

Newbie
Joined
Dec 14, 2020
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
17
Suppose i have a 10 bit SAR ADC (conventional switching) with 3 binary weighted redundant bits. C10 C9 C8 C8R C7 C6 C5 C5R C4 C3 C2 C2R C1 with weights 512 256 128 128 64 32 16 16 8 4 2 2 1

How to convert the 13 bit code to 10 bit code.?

I added them like this:

C10 C9 C8
————C8R C7 C6 C5
——————————C5R C4 C3 C2
————————————————-C2R C1

There seems to be a gain error in the output which reduces the range. Is that expected?
 
Last edited:

Sort by date Sort by votes
Those "redundant bits" I imagine would be switched-in replacements for their co-named main bits. Presumably some select logic with RAM, NV or hard trim bits programmed at early test or some cal cycle if rewritable.
 

Upvote 0 Downvote

Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

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