Spice model of AD7541,AD524 to simulate in ORCAD

Hi all,

             I just  want information about the  spice model  of AD7541 12-bit CMOS  DAC, And  AD524 Precision instrumentation  amplifier. I want  these 2  IC's in ORCAD CAPTURE to model my circuit. I  will be greatful  if you  can you just please guide me where can i   download or can you just  send  spice model (*.lib), symbol (*.olb)   files to simulate in ORCAD.

Thanking you  in advance.


Satish kumar B,

ISRO satellite centre,


  • 0
    •  Analog Employees 
    on Jun 20, 2011 3:55 PM

    Hi Satish,

    Unfortunately we do not have any Spice model. I would suggest to have a look at the equivalent circuit of a CMOS DAC (see below) as a help:



         Co is the output capacitance of the DAC switches (code dependent).

         Rs is the output resistance seen between OUT1 and OUT2 with Vref at ground (code dependent).

         R is the input resistance.

         RFB is the feedback resistor.

    Best Regards,


  • 0
    •  Analog Employees 
    on Aug 2, 2018 4:25 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin