DAC reference voltage problem?

[alson]

problems with dac with no reference voltage

I want to design a DAC have two reference voltage.
how should i do?

 

[brain79]

dac reference voltage

what do you want, the DAC design or the voltage reference design

 

[fatwolfning]

Do you mean you want to switch between these two reference voltage?

 

[alson]

dear fatwolfning!

yes!!!
I want to switch between these two reference voltage
assume reference voltage is 3.3V and 1.6V

please give me a suggest!

 

[maxwellequ]

What kind of DAC are you designing? Specs and architecture are fundamental.

Regards

 

[Moof]

If you dont want to spend money, you can use two tl431 and a cd4053 (analog switch).

 

[alphi]

If possible use tl431 and switch like CD4066

 

[opamp741]

how can we do this in VLSI..
can any body suggest some paper on low impedence switches and analog multiplexers..
regards

 

[jako123]

hi,

take for instance a resistor network DAC and switch with a multiplexor between the references!

 

[springf2000]

in fact y can use two DAC,everyone use a reference,or use one DAC,then use a analoge switch to connect the two reference voltage,but i advice y use the two DAC