middlehein
Newbie level 5
So I am trying to model a AD620 inamp from anolog devices and have their Lib with the AD620 in it and am trying to use that with a basic circuit. I am new to Capture CIS pspice and cannot seem to get the circuit to work without the convergence failing. I thought it might be a floating ref point, but everything is grounded so I am not sure where I am going wrong here. Below is the output and a picture of the circuit.
** Creating circuit file "sweep.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS
*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of C:\Cadence\SPB_16.3\tools\PSpice\PSpice.ini file:
.lib "nom.lib"
*Analysis directives:
.TRAN 0 100ms 0
.OPTIONS STEPGMIN
.PROBE N([N00559])
.PROBE N([N00480])
.PROBE N([N00493])
.INC "..\SCHEMATIC1.net"
**** INCLUDING SCHEMATIC1.net ****
* source SCIM IN-AMP TEST
X_U1 N00493 N00489 N00572 N00965 N00559 0 N00180 N00187 AD620/AD
C_C1 N00480 N00493 .1u TC=0
C_C2 N02797 N00489 .1u TC=0
R_R1 N00187 N00180 10meg TC=0,0
C_C3 N00572 0 .33u TC=0
C_C4 N00572 0 .01u TC=0
C_C5 N00965 0 .33u TC=0
C_C6 N00965 0 .01u TC=0
R_R2 N00493 0 1meg TC=0,0
R_R3 0 N00559 1k TC=0,0
V_V1 N00480 0
+SIN 0 1 1000 0 0 0
V_V2 N00572 0 15Vdc
V_V3 0 N00965 -15Vdc
V_V4 N02797 0
+SIN 0 1 500 0 0 0
R_R4 N00489 0 1meg TC=0,0
**** RESUMING sweep.cir ****
.END
**** 08/04/12 20:22:37 ******* PSpice 16.3.0 (June 2009) ****** ID# 0 ********
** Profile: "SCHEMATIC1-sweep" [ C:\Users\heinx055\Desktop\Circuit anaylsis\scim in-amp test-pspicefiles\schematic1\sweep.sim ]
**** Diode MODEL PARAMETERS
******************************************************************************
X_U1.DX X_U1.DY
IS 1.000000E-12 1.000000E-12
BV 50
**** 08/04/12 20:22:37 ******* PSpice 16.3.0 (June 2009) ****** ID# 0 ********
** Profile: "SCHEMATIC1-sweep" [ C:\Users\heinx055\Desktop\Circuit anaylsis\scim in-amp test-pspicefiles\schematic1\sweep.sim ]
**** BJT MODEL PARAMETERS
******************************************************************************
X_U1.QN1 X_U1.QN2
NPN NPN
LEVEL 1 1
IS 100.000000E-18 100.000000E-18
BF 10.000000E+03 250
NF 1 1
BR 1 1
NR 1 1
ISS 0 0
RE 0 0
RC 0 0
CJE 0 0
VJE .75 .75
CJC 0 0
VJC .75 .75
MJC .33 .33
XCJC 1 1
CJS 0 0
VJS .75 .75
KF 700.000000E-18 5.000000E-15
AF 1 1
CN 2.42 2.42
D .87 .87
ERROR -- Convergence problem in transient bias point calculation
Last node voltages tried were:
NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE
(N00180) -.6352 (N00187) -.6355 (N00480) 0.0000 (N00489)-309.0E-06
(N00493)-583.9E-06 (N00559) 12.4040 (N00572) 13.7430 (N00965) 13.7430
(N02797) 0.0000 (X_U1.3)-584.1E-06 (X_U1.4)-309.1E-06 (X_U1.5) 13.2850
(X_U1.6) 13.2850 (X_U1.9) -.6352 (X_U1.10) -.6355
(X_U1.11) 13.2850 (X_U1.12) 13.7000
(X_U1.13) 13.7430 (X_U1.14) 13.1260
(X_U1.15) 13.7000 (X_U1.16) 13.7430
(X_U1.17) 13.1260 (X_U1.18) 13.1060
(X_U1.19) -.6356 (X_U1.21)-570.4E-06
(X_U1.25) 13.6520 (X_U1.26) 12.3420
(X_U1.27) 14.9620 (X_U1.36) 1.0545
(X_U1.38) 12.5920 (X_U1.40) 13.5630
(X_U1.41) 13.9160 (X_U1.42) 10.8920
(X_U1.43) 13.1880 (X_U1.44) 64.1980
(X_U1.45) 12.4040 (X_U1.51) 13.1020
(X_U1.52) 13.1020 (X_U1.53) 14.3850
(X_U1.54) 14.3850 (X_U1.98) 12.5920
These voltages failed to converge:
V(N00559) = 12.48V \ 12.40V
V(X_U1.38) = 13.74V \ 12.59V
V(X_U1.98) = 13.74V \ 12.59V
V(X_U1.40) = 13.66V \ 13.56V
V(X_U1.36) = -446.46uV \ 1.055V
V(X_U1.45) = 12.48V \ 12.40V
V(X_U1.41) = 13.99V \ 13.92V
V(X_U1.42) = 10.97V \ 10.89V
These supply currents failed to converge:
I(X_U1.EREF) = 12.50nA \ 12.44nA
I(X_U1.E3) = 13.74uA \ 11.54uA
I(X_U1.L1) = 9.480mA \ 9.394mA
I(V_V2) = 10.00GA \ 10.00GA
I(V_V3) = 10.00GA \ 10.00GA
I(X_U1.V6) = -10.00GA \ -10.00GA
I(X_U1.V7) = -10.00GA \ -10.00GA
ERROR -- Discontinuing simulation due to convergence problem
**** Interrupt ****
** Creating circuit file "sweep.cir"
** WARNING: THIS AUTOMATICALLY GENERATED FILE MAY BE OVERWRITTEN BY SUBSEQUENT SIMULATIONS
*Libraries:
* Profile Libraries :
* Local Libraries :
* From [PSPICE NETLIST] section of C:\Cadence\SPB_16.3\tools\PSpice\PSpice.ini file:
.lib "nom.lib"
*Analysis directives:
.TRAN 0 100ms 0
.OPTIONS STEPGMIN
.PROBE N([N00559])
.PROBE N([N00480])
.PROBE N([N00493])
.INC "..\SCHEMATIC1.net"
**** INCLUDING SCHEMATIC1.net ****
* source SCIM IN-AMP TEST
X_U1 N00493 N00489 N00572 N00965 N00559 0 N00180 N00187 AD620/AD
C_C1 N00480 N00493 .1u TC=0
C_C2 N02797 N00489 .1u TC=0
R_R1 N00187 N00180 10meg TC=0,0
C_C3 N00572 0 .33u TC=0
C_C4 N00572 0 .01u TC=0
C_C5 N00965 0 .33u TC=0
C_C6 N00965 0 .01u TC=0
R_R2 N00493 0 1meg TC=0,0
R_R3 0 N00559 1k TC=0,0
V_V1 N00480 0
+SIN 0 1 1000 0 0 0
V_V2 N00572 0 15Vdc
V_V3 0 N00965 -15Vdc
V_V4 N02797 0
+SIN 0 1 500 0 0 0
R_R4 N00489 0 1meg TC=0,0
**** RESUMING sweep.cir ****
.END
**** 08/04/12 20:22:37 ******* PSpice 16.3.0 (June 2009) ****** ID# 0 ********
** Profile: "SCHEMATIC1-sweep" [ C:\Users\heinx055\Desktop\Circuit anaylsis\scim in-amp test-pspicefiles\schematic1\sweep.sim ]
**** Diode MODEL PARAMETERS
******************************************************************************
X_U1.DX X_U1.DY
IS 1.000000E-12 1.000000E-12
BV 50
**** 08/04/12 20:22:37 ******* PSpice 16.3.0 (June 2009) ****** ID# 0 ********
** Profile: "SCHEMATIC1-sweep" [ C:\Users\heinx055\Desktop\Circuit anaylsis\scim in-amp test-pspicefiles\schematic1\sweep.sim ]
**** BJT MODEL PARAMETERS
******************************************************************************
X_U1.QN1 X_U1.QN2
NPN NPN
LEVEL 1 1
IS 100.000000E-18 100.000000E-18
BF 10.000000E+03 250
NF 1 1
BR 1 1
NR 1 1
ISS 0 0
RE 0 0
RC 0 0
CJE 0 0
VJE .75 .75
CJC 0 0
VJC .75 .75
MJC .33 .33
XCJC 1 1
CJS 0 0
VJS .75 .75
KF 700.000000E-18 5.000000E-15
AF 1 1
CN 2.42 2.42
D .87 .87
ERROR -- Convergence problem in transient bias point calculation
Last node voltages tried were:
NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE
(N00180) -.6352 (N00187) -.6355 (N00480) 0.0000 (N00489)-309.0E-06
(N00493)-583.9E-06 (N00559) 12.4040 (N00572) 13.7430 (N00965) 13.7430
(N02797) 0.0000 (X_U1.3)-584.1E-06 (X_U1.4)-309.1E-06 (X_U1.5) 13.2850
(X_U1.6) 13.2850 (X_U1.9) -.6352 (X_U1.10) -.6355
(X_U1.11) 13.2850 (X_U1.12) 13.7000
(X_U1.13) 13.7430 (X_U1.14) 13.1260
(X_U1.15) 13.7000 (X_U1.16) 13.7430
(X_U1.17) 13.1260 (X_U1.18) 13.1060
(X_U1.19) -.6356 (X_U1.21)-570.4E-06
(X_U1.25) 13.6520 (X_U1.26) 12.3420
(X_U1.27) 14.9620 (X_U1.36) 1.0545
(X_U1.38) 12.5920 (X_U1.40) 13.5630
(X_U1.41) 13.9160 (X_U1.42) 10.8920
(X_U1.43) 13.1880 (X_U1.44) 64.1980
(X_U1.45) 12.4040 (X_U1.51) 13.1020
(X_U1.52) 13.1020 (X_U1.53) 14.3850
(X_U1.54) 14.3850 (X_U1.98) 12.5920
These voltages failed to converge:
V(N00559) = 12.48V \ 12.40V
V(X_U1.38) = 13.74V \ 12.59V
V(X_U1.98) = 13.74V \ 12.59V
V(X_U1.40) = 13.66V \ 13.56V
V(X_U1.36) = -446.46uV \ 1.055V
V(X_U1.45) = 12.48V \ 12.40V
V(X_U1.41) = 13.99V \ 13.92V
V(X_U1.42) = 10.97V \ 10.89V
These supply currents failed to converge:
I(X_U1.EREF) = 12.50nA \ 12.44nA
I(X_U1.E3) = 13.74uA \ 11.54uA
I(X_U1.L1) = 9.480mA \ 9.394mA
I(V_V2) = 10.00GA \ 10.00GA
I(V_V3) = 10.00GA \ 10.00GA
I(X_U1.V6) = -10.00GA \ -10.00GA
I(X_U1.V7) = -10.00GA \ -10.00GA
ERROR -- Discontinuing simulation due to convergence problem
**** Interrupt ****