Reverse ADC, DAC?

[tom_pay]

Hi

In Micro Controllers we use ADC, producing a digital representation of an analogue input. But how is it done in reverse, producing an analogue output from a digital signal?

Tom

 

[ericgibbs]

Hi

In Micro Controllers we use ADC, producing a digital representation of an analogue input. But how is it done in reverse, producing an analogue output from a digital signal?

Tom

hi,
One way that is used is PWM connected to a diode/resistance/capacitor 'demodulator' [ actually a C/R filter]

 

[Nigel Goodwin]

Or an R2R ladder, both ways are covered in MicroChip application notes.

 

[tom_pay]

Ahhh,

Thanks for that, I shall do some more research into both methods.

Thanks,

Tom

 

[DirtyLude]

Or you can use a microcontoller with a DAC built in.


..or an external DAC chip.