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alson
Joined: 10 May 2004
Posts: 8
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 19 Jul 2004 11:06 DAC reference voltage problem? |
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I want to design a DAC have two reference voltage.
how should i do?
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brain79
Joined: 20 Apr 2004
Posts: 57
Location: COLOMBIA
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| 19 Jul 2004 13:48 Re: DAC reference voltage problem? |
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| what do you want, the DAC design or the voltage reference design
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fatwolfning
Joined: 03 Apr 2003
Posts: 7
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| 19 Jul 2004 14:14 DAC reference voltage problem? |
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| Do you mean you want to switch between these two reference voltage?
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alson
Joined: 10 May 2004
Posts: 8
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| 19 Jul 2004 14:31 Re: DAC reference voltage problem? |
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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!
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maxwellequ
Joined: 27 Jun 2001
Posts: 185
Helped: 11
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| 19 Jul 2004 22:28 Re: DAC reference voltage problem? |
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What kind of DAC are you designing? Specs and architecture are fundamental.
Regards
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Moof
Joined: 21 Nov 2003
Posts: 154
Helped: 6
Location: Argentina
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| 19 Jul 2004 23:06 Re: DAC reference voltage problem? |
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If you dont want to spend money, you can use two tl431 and a cd4053 (analog switch). 
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alphi
Joined: 23 Dec 2001
Posts: 439
Helped: 1
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| 20 Jul 2004 1:03 Re: DAC reference voltage problem? |
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| If possible use tl431 and switch like CD4066
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opamp741
Joined: 17 Jun 2004
Posts: 145
Helped: 10
Location: India
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| 20 Jul 2004 12:07 Re: DAC reference voltage problem? |
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how can we do this in VLSI..
can any body suggest some paper on low impedence switches and analog multiplexers..
regards
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jako123
Joined: 30 Jul 2002
Posts: 106
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| 20 Jul 2004 13:51 Re: DAC reference voltage problem? |
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hi,
take for instance a resistor network DAC and switch with a multiplexor between the references!
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springf2000
Joined: 13 Jun 2004
Posts: 414
Helped: 18
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| 21 Jul 2004 13:46 Re: DAC reference voltage problem? |
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| 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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