Is there a SPICE model for AD5246 resistor or it's equivalent (model which works the same but has different ID/name)? Are there even any equivalents for AD5246 from Analog Devices or other manufacturers?

ChatGPT prepared me such model for AD5246, but it looks too simple when comparing with the functional block diagram from documentation.

I'm beginner in electronics but it seems inaccurate.

Here's the model:

* Analog Devices AD5246 digital potentiometer
*
* Model created by ChatGPT
*
.SUBCKT AD5246 1 2 3 4 5
*
* Input terminals
*
* Terminal 1: CS - Chip Select
* Terminal 2: U/D - Up/Down Control
* Terminal 3: INC - Increment
*
* Output terminals
*
* Terminal 4: VOUT - Wiper Output
* Terminal 5: GND - Ground
*
.PARAM R1=10k
.PARAM R2=10k
.PARAM R3=10k
.PARAM R4=10k
.PARAM R5=10k
.PARAM R6=10k
.PARAM R7=10k
.PARAM R8=10k
.PARAM R9=10k
.PARAM R10=10k
*
R1 1 2 {R1}
R2 2 3 {R2}
R3 3 4 {R3}
R4 4 5 {R4}
R5 5 4 {R5}
R6 3 5 {R6}
R7 1 5 {R7}
R8 2 5 {R8}
R9 4 1 {R9}
R10 4 2 {R10}
*
.MODEL AD5246 SW(Ron=50m Roff=50Meg Vt=2.5)
.ENDS

ChatGPT also added note: The values of the resistors (R1-R10) and the model parameters (Ron, Roff, and Vt) may need to be adjusted based on the specific application and requirements.

Hypothethically, if this model turned out to be true and accurate SPICE representation of AD5246, I would have to edit manually values of R1 to R10?

Hi,

Unfortunately, we do not have any model on the digital potentiometer. May I ask what is the reason why you need a model? You could try simulating using a single resistor instead.

Best Regards,

Yokki

Hi, thanks for your reply!

I'm doing some team project for college and we decided to use this particular AD5246 as a resistor to implement 0V to 30V regulator circuit  from chapter 9.3.1 of Texas Instruments' LM317 documentation.

But instead of some random resistors R1 and R3, we decided to use AD5246 resistors.

There's no such component built-in inside MultiSim 14.3 Education, that's why I'm searching for help with implementing this model by myself.

But looks like chosing AD5246 is overkill, so you recommend sticking to some random resistor?

Or else, I could just copy random resistor component and rename it to AD5246, but does the random will need some additional features to be considered copy of AD5246?

Thanks for help!

Hi,

Yes, you can use a random resistor in MultiSim, just input the needed same specifications as AD5246.

Best Regards,

Yokki

Hi,

There's a sample of modeling digipot here on the RDAC Circuit Simulation Model section: AD5280/AD5282 Single/Dual, + 15 V/+/-, 256-Position, I2C-Compatible Digital Potentiometer Data Sheet (Rev. C) (analog.com)

Best Regards,

Yokki