[sdiy] DAC/REF Data sheet / Dev board R question

[Paul Perry]

I don't know about this particular case, but sometimes you DO need a series 
resistor on the output cap, strange as it might seem.
Some regulators expect the output capacitor to have an ESR within certain 
bounds - see for example app note
http://www.ti.com/lit/an/snva558/snva558.pdf .  Note that for a given cap, 
ESR varies with temperature.
I hate to think of the number of times I had designs behave inextricably 
weirdly due to neglecting to pay attention
to the regulator specs.
Although three terminal regs are available very cheaply indeed from 
practically anywhere, they are one of
the components that I find worth buying from recognised manufacturers.

It's nice that we can get regulators today with all manner of specs - but 
all this cunning design comes at the cost
of having to pay close attention to the app notes.

paul perry Melbourne Australia

----- Original Message ----- 
From: <rsdio at audiobanshee.com>
>I say that you not only can safely get rid of this resistor, but that you 
>should get rid of it! I don't see how it can do anything but harm.
>