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DAC reference voltage problem?

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alson

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problems with dac with no reference voltage

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

dac reference voltage

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

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

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!
 

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

Regards
 

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

If possible use tl431 and switch like CD4066
 

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

hi,

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

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
 

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