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Old 10th April 2004, 10:38 PM   #1
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Question Tda1543=>opa2604

Hi guys!
I have a pair of OPA2604 chips. How about using them like in datasheets for TDA1543 for i/v conversion? Any yes and no's?
thanks
daniel
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Old 11th April 2004, 03:36 PM   #2
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Old 11th April 2004, 04:17 PM   #3
Mad_K is offline Mad_K  Norway
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I'm using one 2604 like in the 1543 datasheet: It simply blows me away! Go ahead and try it, you won't be dissapointed. Use a 3K3 resistor from Vref to gnd.
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Old 12th April 2004, 07:44 AM   #4
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YEES!

Thanks Mad_K; one thing what is the power supply of Your TDA1543 chip?
regards
daniel
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Old 12th April 2004, 08:06 AM   #5
Mad_K is offline Mad_K  Norway
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rectifier->2200uF->1mH->2200uF->LM317/337 with 47uF on adj->330uF->TL431
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Old 12th April 2004, 02:06 PM   #6
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OOOPS
I have the voltage for Your TDA1543 on mind. What power supply voltage for TDA do You use? With that (and with Vref resistor You have mentioned) I would know the working point of the TDA ..... Thanks; daniel


p.s. My power suppply is preety much the same as Yours
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Old 12th April 2004, 04:07 PM   #7
Mad_K is offline Mad_K  Norway
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I have +/- 15V after LM317/337 and shunted down via TL431 to +5V on the 1543. There is about +2V on the output of the dac/opa.

edit:

rectifier->2200uF->1mH->2200uF->LM317/337 with 47uF on adj->330uF:
+/- 15V:
->330uF+150nF per opa
+15V:
->100ohm/2W->TL431:
+5V
->330uF+150nF+10nF SMD to 1543
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Old 12th April 2004, 05:55 PM   #8
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Thanks!
I appreciate it very much!
daniel
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