I'm new to LTSpice but have the basics figured out (laying out a schematic, setting up simulation, running) and have done so with the basic but very well stocked library included. Of course my issue is I'm not using LT op amps.
I'm trying to import the model for the LM4562, but there are three options: PSPICE, and two TINA-TI which I'm not even sure what that is. The PSPICE package does not contain any .mod or .subckt files, rather it contains a .lib that has all the subcircuit information in it.
I have been trying for the last few hours to import the parameters and get it to work to no avail. All the tutorials are usually directed either at .mod files, or when I try to .INCLUDE the .LIB file, it throws errors that I don't fully understand.
I used the opamp2 symbol and modified it so that the pin names match up, or at least I believe I did (I could have done it incorrectly I suppose).
Below is a screenshot of the circuit I'm using to test it, and the error message I get:
Below is my Netlist:
V1 VCC 0 9
V2 0 VEE 9
V3 Vni 0 SINE(0 1 500)
R1 0 Vi 1K
R2 OP Vi 9.09K
XU1 Vi Vni VCC VEE OP LM4562
.tran 0 25ms 0s 1ms
Errors are as follows. I'm not sure what nodes are floating:
**Circuit: * D:\Projects\Electronics!TestCCt\opamp test.asc
WARNING: Node U1:1:U11:VP1 is floating. WARNING: Node U1:1:14 is floating. WARNING: Node U1:1:U11:VP2 is floating. WARNING: Node U1:1:U11:VP3 is floating. WARNING: Node U1:1:U11:VP4 is floating. WARNING: Node U1:1:U11:VZ1 is floating. WARNING: Node U1:1:U11:VZ2 is floating. WARNING: Node U1:1:U11:VZ3 is floating. WARNING: Node U1:1:U11:VZ4 is floating. WARNING: Node U1:1:9 is floating.
Direct Newton iteration failed to find .op point. (Use ".option noopiter" to skip.) Starting Gmin stepping Gmin = 10 Gmin = 1.07374 vernier = 0.5 vernier = 0.25 vernier = 0.125 Gmin = 1.02385 vernier = 0.0625 vernier = 0.03125 vernier = 0.015625 Gmin = 1.01955 vernier = 0.0078125 vernier = 0.00390625 Gmin = 1.0126 vernier = 0.00520833 vernier = 0.00260417 vernier = 0.00130208 Gmin = 1.00833 vernier = 0.000651042 vernier = 0.000868055 Gmin = 1.00696 vernier = 0.00115741 vernier = 0.000578703 Gmin = 1.00536 vernier = 0.000771604 vernier = 0.000578703 vernier = 0.000771604 vernier = 0.000578703 Gmin = 1.00449 vernier = 0.000434027 vernier = 0.000578703 Gmin = 1.00351 vernier = 0.000434027 Gmin = 0 Gmin stepping failed
Starting source stepping with srcstepmethod=0 Singular matrix: Check node u1:1:u11:vz3 Iteration No. 1 Singular matrix: Check node u1:1:9 Iteration No. 2 Could not converge to DC with sources off! Starting source stepping with srcstepmethod=1 Singular matrix: Check nodes u1:1:14 and u1:1:9 Iteration No. 1 Could not converge to DC with sources off! Singular matrix: Check node u1:1:9 Iteration No. 1 Fatal Error: Singular matrix: check node u1:1:9 Iteration No. 1
This circuit has floating nodes.**
What am I doing wrong, and more importantly, how do I import this model correctly?