Looking for a Spice model

Discussion in 'General Electronics Chat' started by R!f@@, Jul 13, 2016.

  1. R!f@@

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    I am looking for a spice model for the part ACS723LLCTR-10AU-T.
    I cannot find it on Allegro site.

    Does it exist ?
    Is it easy to make one ?
     
  2. Alec_t

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    Depends how accurate a model you want. The functional diagram in the datasheet would be a starting point, but is rather vague in some areas.
     
  3. R!f@@

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    I had run into a problem.
    China and ebay does not seem to have this part ACS723LLCTR-10AU-T.
    Does any one here got it for sale. I want around 5 pcs.
     
  4. Alec_t

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    Is there no suitable alternative to that particular part?
     
  5. Techno Tronix

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  6. R!f@@

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    Since I cannot get it I had to rethink my design and I think I have a working solution.
    But it does require a bit more coding for the PIC than with just two ADC's for Voltage and current. All I had to sacrifice was just one more ADC and use additional OP340 opamp instead of the current sensor, which I think is a much cheaper solution.
     
  7. eetech00

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    Well, if you change your mind and decide to use ACS723...
     
  8. R!f@@

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    I might still like to use it in future. So I am interested.
    Ur image shows bi-directional. What I need is uni-directional one
    ACS723LLCTR-10AU-T.
    Do you have it ? The spice. I need to use it for NI Multisim
     
  9. eetech00

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    Hi

    Yes I have it, but only for LTspice. See post #7.
     
  10. R!f@@

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    I think it is possible to make a multisim model using spice model
     
  11. Alec_t

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    Is it a home-brew model or an 'official' one from Allegro or elsewhere?
     
  12. eetech00

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    I checked with Allegro and they didn't have one so I modeled it myself.
    I checked the model against the part. The output waveform and sensitivity is correct for both AU and AB devices. I didn't model the BW select pin, magnetic field coupling, or temperature characteristics. Its a behavioral model created using data sheets and bench tests.
     
    Last edited: Jul 30, 2016
  13. Alec_t

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    Would you care to share the model files? Other members here may find them useful.
     
  14. eetech00

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    Sure.

    The attached zip file includes a test circuit sim.
    I used a UniversalOpamp2 for the level shifter on the sim. but for the bench test, I used an LM358.

    Have fun...
     
  15. Alec_t

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    Thanks.
     
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