Why do we need these components?

[gjoo]

Why do we need 10 ohm resistors R6 and R7, I've never seen them used in similar situations. Also, C10 22uf capacitor, why is it there , when the datasheet calls for a 22 uf capacitor on the output only? Lastly, is c11 1 uf necessary , it seems that's it is not large enough to make a difference, since you have .1uf already there?

 

[rjenkinsgb]

Those look to be damping resistors, on a data bus.
dg.

https://www.analog.com/media/en/training-seminars/tutorials/mt-097.pdf

The larger capacitors would give better stability with a somewhat noisy supply.

(And again you have not posted enough of the circuit to see where everything connect to - I just happened to remember it from your previous thread).

 

[Nigel Goodwin]

R6 and R7 aren't required, but do no harm - probably just a personal preference of the designer?. C10 seems fine, it's a supply decoupler and reservoir capacitor. Likewise C11, it makes sense to have an electrolytic (for lower frequency decoupling), and a smaller non-electrolytic for higher frequency decoupling.

But again, it's all personal preference - the paired decouplers are mostly there for 'good practice', in reality they not make the slightest bit of difference.

 

[danadak]

Output C requirements from datasheet :

Regards, Dana.

 

[gjoo]

Thanks for all the help.