HOW TO GENERATE 0-10V USING DAC TO OP-AMP

[sumansingh]

hello guys..
can any one tell me how to generate the 0-10V by using op-amp..?

 

[karesz]

Hallo,
one possibility is on fig.39:
https://datasheet.octopart.com/ADR431BRZ-Analog-Devices-datasheet-2991.pdf
K.

 

[karesz]

Hi,
pls refer to Fig. 9_ as principe of solution, then these DAC delivers 1.23V, its amplified in case of appl. idea to max 5V. Your need is 10V, so you have R2--R4 to change for a higher amplifying with OP191 from 1.23V to 10V (instead 5V)... Its all.
K.

 

[sumansingh]

tnx 4 replying...karesz

but in my application if iam giving 1V i/p to the op-amp should be 1V o/p...if iam giving 1.2V....the o/p should be 1.2V only ok..like dat i hv to generate up tp 10V... for my dimming ballast application...it is nt manuval mode..all r generate AUTOMATICALLY....so plz tell me clearly



tnx

 

[karesz]

Sorry, I dint understand your subject...
Have you an DAC with voltage output & in what kind of range is pls, what you have to amplify up to 0--10V?
Or you dont have more DAC in system as the in title you have suggested?
K.

 

[sumansingh]

actually iam using here msp430fg4619 mc..k and it is inbuilt DAC...k n my application is dimming ballast..k for this dimming purpose i wnt to genarate 0-10VDC
means if my vol is 0...the ballast is 0% dimm , if my vol is 3V my ballast is 30% dimm like dat up to 10V...100%.but here MC o/p vol is 3.5 ok.....so here i wnt 0-10VDC automatically...nt manually...

 

[karesz]

Hi,
As I read it from the data sheet, it delivers max. AVcc voltage output(or Uref).
that means only, that you must have an OpAmp with RtoR Output supplyd on minimum +10.5...+11V and od amplify it.
Of course it will be automaticaly controlled as a 0..+10V potential, if you will control your DAC in system automatically ...
K.