D/A converter (DAC) current loop interface circuit using multifunctional sensor signal conditioner AD694

Published:2012/8/28 1:35:00 Author:Ecco | Keyword: multifunctional sensor, signal conditioner , D/A converter , current loop , interface | From:SeekIC

AD694 can be used as d/a converter (DAC) current loop interface to achieve the conversion of digital → voltage signal→ current signal . Current loop interface of DAC circuit is shown in the figure. AD566A is high speed 12-bit DAC, its output end (DAC OUT) connects to AD694 UI-end, UI+ end is grounded. AD694 uses ± 15V dual power supply, and AD566A provides reference voltage. AD694 uses the internal resistor network to configure AD566A as 10V full scale input. C2 is frequency compensation capacitor. RP is full scale adjustment potentiometer, you can use 50 Ω fixed resistors to replace potentiometer when it does not need adjustment.



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