ADUM4221 LTSPICE model

Hi N.Kokubo,

Thank you for this feedback regarding the ADuM4221 LTspice model. We already relay this concern to the modeling team, and we'll get back to you once we have received feedback from them.

I'm just curious, why do you want the ADuM4221 to operate in bipolar supply mode where the part is not designed for this kind of operation?

Thanks and regards,

Jefferson

Hi

I changed R2 and R3 from 5.1 ohm to 5.1m ohm at GNDA=GNDB=0V.

 Gate_A and Gate_B swing from -4V to 15V.

Why does Gate_A and Gate_B swing from -4V to 15V?

I will use GAN. GAN needs negative gate voltage.

best regards

N.Kokubo

Hi N. Kokubo,

Thank you for capturing this bug. The modeling team is already working on fixing these bugs. Will let you know once the updated model was already available in LTspice library.

Best regards,

Jefferson

Hi NKokubo,

Just an FYI, these bugs on the ADuM4221A, B, C were already fixed.

Small RG:

Negative supply:

Kindly run the "Update Component" to update the models in your machine.

Let me know if you encounter any other problems.

Thanks and regards,

Jefferson

Hi Jefferson

Thank you for your Update models.

We have confirmed that the model has been improved.

But I found the same issue about ADUM4221-1A spice model.

Could you update about ADUM4221-1A spice model?

Best regards

N.Kokubo

Hi N.Kokubo,

The ADuM4221-1x and ADuM4221-2x is on-going modification following the fix on the ADuM4221x.

Hoping to have them release by early November.

Thanks and regards,

Jefferson

Hi Jefferson san

Thank you for your reply.

Could you inform me after fixing the model of  ADuM4221-1x and ADuM4221-2x ?

best regards

N.Kokubo

Hi N.Kokubo.

All the models for ADuM4221x, -xx family are updated. Please run the "Update Component" to update the models in your machine.

Let me know if you encounter any issues.

Best regards,

Jefferson

Hi,

Despite updating the components, I still see a similar issue. When I add a 100nH ferrite bead in the output path the voltage becomes lower than expected (it should be zero volt in the low state).

With many thanks,

Marc

Hi Marc,

Thank you for raising this issue with the model - I confirmed the response and I reported this to the LTspice modelling team to fix this bug.

Let me know if you find any other bug.

Best regards,

Jefferson