I am designing an active loop filter using OP270Z op amp for a L band VCO synthesizer. In order to simulate the open loop gain and Phase and derive the filter parameters as well as the stability over worst case conditions (including effects of component tolerances etc.) I need a detailed Pspice model. Any information and suggestions is much appreciated.
FYI: OP270 is labelled as not recommended for new designs.
There is a pspice model for this part already: https://www.analog.com/en/products/op270.html#product-tools
I've imported the model into LTspice which you can download for free:
Thank you for your prompt response. Is there a recommended OP amp I can utilize. This is for a satellite application and am looking for a Rad tolerant device (TiD 30K Rad). OP270Z appears in the DCSS list suitable for Space (flight PN5962R9468002VHA).
Any equivalent device would you recommend. Bread board evaluation used ADA4896-2 (commercial device not recommended for space use) and would appreciate your suggestion for an equivalent replacement with a space approved packaged device.
I have limited visibility into Space / flight products. So unfortunately I cannot help you but hopefully other people on this forum can. Sorry.
The following are space qualified, but I don't know what the rad tolerance is:
AD8671S, ADA4077-2S, ADA4084-2S, and AD8629S. See:
My choice for your application would be the 4077.