analog reference voltage external

Do I need any kind of resistor to limit current to the arduino board if i am going to be using an external voltage as a reference? It says that there is a 32k resistor on the AREF pin, so I am assuming no, but I don't want to kill my board.

Thanks for any input, Trevor

It says that there is a 32k resistor on the AREF pin,

Where does it say that?

It says it on the arduino page about analogRefrence() , but it does not really explain much about it, just mentions it once. here is a link to the page

http://arduino.cc/en/pmwiki.php?n=Reference/AnalogReference

Down in the warning section.

Thanks for the link, in fact it says:-

there is an internal 32K resistor on the AREF pin.

The important thing here is it says “internal” - that means inside the processor.
There is no need to have an external resistor when connecting a voltage to this pin. However do heed the warnings on that page about calling the function that sets the reference voltage to external before doing any analogue read.

Thanks for the help.

I presume the reference voltage will NOT exceed 5 volts.

...R