SPICE model OP42

Hi serious_coco,

I think that such models do not exist. At least no ADI or LT amplifier has such a similar model. A complete accurate model of the input stage of op-amp is required to adequately model these adjustment pins. Such a detailed internal circuit description is always avoided when compiling spice macromodels.

You can easily model the function of these pins by simply adding a voltage source in series with any input of the op amp.

Or do you have special requirements?

Regards,

Kirill

Hi,

Kirill has a point, to avoid complexities in the model, the NULL pins can be omitted on the model pins.

This was probably the thinking of the one's who created this model.

Its also correct that offset voltages can be added externally using voltage sources in series at the opamp input.

But it will be a good practice in the future models to model all the pins in a part except the NC or no connect pins.

By the way, this part is quite old and as you can see in the product page that it is not recommended for new designs.

Can you share what opamp, specs, requirement or application you are working right now and why you are trying to use the OP42?

We could recommend newer parts that might suit your needs. 

Hi,

We are currently using the TL071 opamp of Texas Instruments, but the package is not suitable for operate in vacuum.

We need a low noise operational amplifier, with a package that supports the level of vacuum required (1e-06 mbar). The output signal must be able to be adjusted at 0V.

Thank you for your attention.

Hi,

Null pins are usually used in conjunction with a potentiometer and this requires manual adjustment. If we are talking about a device that operates in a vacuum, then a potentiometer with manual adjustment does not look like a rational solution. An additional voltage source looks more suitable for adjusting the offset

It is logical to assume that AEROSPACE parts are ideal for working in vacuum conditions