where or how can I get a DAC to produce 0-500mV

Other Hardware General Electronics
1

High Guys!

I'm a neophyte, and need some help with converting a 0 to 5V signal to a 0 to 500 mV signal.

I'm trying to generate a 0-500mV from a 0-5V input. I'm using the arduino to generate a digital output which will be sent to a DAC where I want to generate the 0 to 500 millivolt output. the problem is, I know next to nothing about DAC's. I have done a little bit of looking, and I can't seam to find a DAC that will generate 0-500mV, let alone figure out the terminology used with DACs.

does anyone know of a DAC with a range of 0 to 500mV?

Is it possible to generate this 0 to 500 mV range using a DAC that produces a 0 to 5V output if I use a voltage reference of 500mV?

any help would be apreciated.

thanks

Justin

2

You normally would use a two-resistor voltage divider with a ratio of 1:9 to drop 5volt to 500mV.
But if you will be getting 0-500mV depends in the circuit attached to that divider (the load).
Maybe you need a pot, to adjust the output.
Maybe you don't even need a DAC if it can be done by smoothing a PWM signal.
If you want proper advice, tell us more.
Post links to the parts, and post a connection diagram.
Leo..