***********************************************************************
***********           PANJIT International Inc.             ***********
***********************************************************************
*May 07, 2021                                                         *
*                                                                     *
*This SPICE Model describes the characteristics of a typical device   *
*and does not respresent the specification. Designer should refer to  *
*the same type name data sheet for specification limits.              *
***********************************************************************
*$
.subckt AZ23C18 A K
.param
+vc0 = 2.375e-11	 vc1 = 1.587e-11   	 vc2 = 9.713e-1		 vc3 = 1.183e-15	  vc4 = 7.394e-1
+tc1 = 2.551e-2		 tc2 = 1.521e-2		 tc3 = 1.645e-2		 tc4 = 2.544e-2 
.func irexp(v) {(vc0+vc1*v^vc2)*(1.0+tc1*(temp-25)*exp(tc2*(temp-25)))+(vc3*exp(vc4*v))*(1.0+tc3*(temp-25)*exp(tc4*(temp-25)))}
d1 A K zener
g1 K A value = {irexp(v(K,A))}
.model zener d
***** flag parameter *****
+level = 1                     
***** dc model parameter *****
+ is = 7.054e-15	   n = 1.101e0		  rs = 3.538e-1		ikf = 5.820e-2
+ibv = 5e-3		 nbv = 0.8		  bv = 18
***** capacitance parameter *****
+cjo = 2.381e-11	   m = 3.310e-1		  vj = 5.874e-1 
+ fc = 0.5
***** temperature coefficient *****
+tnom = 25		  eg = 1.143		 xti = 3
+trs1 = 1.102e-5	trs2 = 9.257e-6		
+tbv1 = 7.663e-4	tbv2 = -1.635e-7	 tikf = -2.110e-4
.ends AZ23C18
*$
