Digital to Analog Converter

[Acetronics2]

Hi, Kutsi

You've two ways for the DAC ...

if using 8 bits output ( for a motor it's far enough !!! ) ... then use a full port with a 1% resistors R/2R ladder to generate the voltage output ... ( a little AOP buffer will make it perfect ... )
no need a MAX 512 or else here ...

if using more bits, a LTC 1257 or 1451 from Linear will work fine, you're not to use all your DAC resolution ... and can send two "0"s as LSBs past the ADC 10 bits you've read !!!

Alain

PS: PWM freq. to use depends upon the motor technology, but there's always some switching noise you can hear in the windings ... but low speed torque obtained is better ( easier to see smoke if overloaded too !!! )

DC won't produce any noise ... but will give poor starting torque, if there's no rpm regulation implemented. a current protection is easier to add in this way ...