function generator

[vik1501]

Hi,

I am trying to build uP based function generator using 12 bit DAC. Please suggest suitable 12 bit DAC....Any suggestions regarding links, articles are most welcome !!

 

[Nigel Goodwin]

Hi,

I am trying to build uP based function generator using 12 bit DAC. Please suggest suitable 12 bit DAC....Any suggestions regarding links, articles are most welcome !!

Why do you want a 12 bit DAC?, the least significant bits are likely to be below the noise and distortion figures - it's probably extra expense and complexity for no gain.

You can easily make any resolution DAC you want with an R2R ladder network, MicroChip have an application note using this technique which you might find useful (even if you're not using a PIC).

 

[crust]

Here is another I found a few months back https://www.qsl.net/zl1bpu/micro/SIGGEN/Siggen.htm

 

[efren sabio]

Hi,

I don't know if this is relevant here...

I'm currently fixing an audio delay effects unit that uses the cpu
8031. There's also dac and adc in the pcb and RAM. Marston book on
audio ICs says that 12 bit is better than less. There is also that
10-bit adc/dac Holtek8955 IC I've been trying to get my hands on
but I couldn't.