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OPA657: .

Part Number: OPA657
Other Parts Discussed in Thread: TINA-TI

I am assigned a project about making a noise filter, amplifier which are applying the signal from photo diode.

I want to use OPA657 so i downloaded the file(OLB, lib) at here site.

https://www.ti.com/product/OPA657?keyMatch=OPA657&tisearch=Search-EN-everything&usecase=GPN#design-development

and i added the OLB files correctly, and added the lib file at the 'configuration files' as global.

but there is a error message. what is the problem? i use 17.2 cadence lite version.

-----------------------------------------------------------------------------------------

*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of C:\Users\travis\AppData\Roaming\SPB_Data\cdssetup\OrCAD_PSpice\17.2.0\PSpice.ini file:
.lib "C:\Cadence\SPB_17.2\userlibrary\OPA657.lib"

*Analysis directives:
.TRAN 0 1s 0
.OPTIONS ADVCONV
.PROBE64 V(alias(*)) I(alias(*)) W(alias(*)) D(alias(*)) NOISE(alias(*))
.INC "..\SCHEMATIC1.net"

**** INCLUDING SCHEMATIC1.net ****
* source SUMMERPROJECT
X_U1 VEE VCC N00613 0 N01062 OPA657
R_R1 0 N00613 1G TC=0,0
C_C1 0 N00613 100P TC=0,0
I_I1 N00613 0 DC 50u
V_V1 VCC 0 5
V_V2 VEE 0 -5
R_R2 N00613 N01062 200K TC=0,0
C_C2 N00613 N01062 0.1P TC=0,0

**** RESUMING TEST.cir ****
.END

ERROR -- EVALUATION VERSION analog Node Limit (75 Nodes) Exceeded!

---------------------------------------------------------------------------------------

because of the word " 75 nodes exceeded", i designed it samely at university pc room where has pspice license(not lite version)

but it did not show me the simulation result, just a gray screen even no error message. 

  • Hello Seung,

    The Lite version has a restricted number of nodes that can be used in your circuit. The issue is that the model for the OPA657 (and most of our models, in fact) have numerous nodes internal to the model itself.

    In regards to the gray screen issue you are having with the Pspice licence, not sure where you are going wrong here. It would be helpful if you could provide some type of error log. Does this gray screen issue only happen when using the OPA657 model or are you having similar issues simulating other circuits?

    Best,

    Hasan Babiker

  • Hi Seung,

    can you show a schematic? Or do you have a TINA-TI file of your circuit?

    Kai