Diode Model-PN-Junction Diode Model

Diode_Model:PN-Junction Diode Model

The SPICE D and Spectre diode models are translated to the ADS Diode_Model. For translation information on the diode device, refer to Dxxxxxxx for SPICE and Diode Device for Spectre.

For more information on the ADS model, place the model in a schematic and choose Edit > Component > Edit Component Parameters to view the model parameters. You can also click Help in the component editor dialog box for additional information.

Example SPICE Command Line:

.model Dmodel d is=10e-15

Example Spectre Command Line:

model pdiode diode is=1.8e-8 rs=1.43 n=1.22 nz=2.31 ...

SPICE and Spectre Dialect and Netlist Syntax:

Spice2/3:	.model mname d [param= value]*
PSpice:	.model mname d [param= value]*
HSpice:	.model mname d LEVEL=[1\|3] [param= value]*
Spectre:	model mname diode [param= value]*

ADS Netlist Syntax:

model mname Diode [param= value]*

ADS Schematic Symbol:

Model Parameters:

For information on parameter format, refer to Using Parameter Mapping Tables to Understand a Translation.

ADS	Default	Unit	Spice2/3	PSpice	HSpice	Spectre
Level	1		-	-	x	level 1
Is	1e-14	A	x	x	JS	is 10e-14 A
Rs	0.0	ohms	x	x	x	rs 0.0 ohms
N	1.0		x	x	x	n 1.0
Tt	0.0	sec	x	x	x	tt 0.0 sec
Cjo	0.0	F	x	x	CJ, CJA	cjo 0.0 F
Vj	1.0	V	x	x	PB, PHI, PHA (0.8 V)	vj 1.0 V pb
M	0.5		x	x	MJ, EXA	m 0.5
Fc	0.5		x	x	x	fc 0.5
Imax	1.0	A	-	-	EXPLI (0 amp/m ² )	imax 1.0 A
Isr	0.0	A	-	x	-	-
Nr	2.0		-	x	-	-
Ikf	infinity (0)	A	-	x	IK, JBF A/m ²	ik infinity A
Ikr	0.0	A	-	-	JBR	-
IkModel			-	1	2	-
Bv	infinity (0)	V	x	x	VB, VAR, VRB	bv infinity V
Ibv	0.001	A	x	1e-10	IB	ibv 0.001 A
Nbv	1.0		-	x	N	nz 1.0
Ibvl	0.0	A	-	x	-	-
Nbvl	1.0		-	x	-	-
Kf	0.0		x	x	x	kf 0.0
Af	1.0		x	x	x	af 1.0
Ffe	1.0		-	-	ISP	-
Jsw	0.0	A	-	-	CJP	isw 0.0 A
Cjsw	0.9	F	-	-	Cjp	cjsw 0.0 F
Msw	0.33		-	-	EXP, MJSW	mjsw 0.33
Vjsw	1.0	V	-	-	PHP	vjsw 1.0 V
Fcsw	0.5		-	-	FCS	fc 0.5
Area	1.0		-	-	x	area 1
Periph	0		-	-	PJ	perim 0
Width		m	-	-	W	-
Length		m	-	-	L	-
Dwl			-	-	XW	-
Shrink			-	-	x	-
Tnom	25	°C	x	T_measured	TREF	tnom set by options °C
Trise	0.0	°C	-	-	-	trise 0.0°C
Tlev	0		-	-	x	tlev 0
Tlevc	0		-	-	x	tlevc 0
Xti	3.0		x	x	x	xti 3.0
Pt	3.0		-	-	-	x
Eg	1.11	eV	x	x	1.11 eV if TLEV=0,1 1.16 eV if TLEV=2	eg 1.11 eV
EgAlpha	7.02e-4	V/°K	-	-	GAP1	gap1 7.02e-4 V/°K
EgBeta	1108	K	-	-	GAP2	gap2 1108 K
Tcjo	0.0	1/°C	-	-	CTA	cta 0.0 1/°C
Tcjsw	0.0	1/°C	-	-	CTP	ctp 0.0 1/°C
Ttt1		1/°C	-	-	x	-
Ttt2		1/°C ²	-	-	x	-
Tm1	0.0	1/°C	-	-	x	-
Tm2		1/°C ²	-	-	x	-
Tvj		1/°C	-	-	TPB	pta 0.0 V/°C
Tvjsw		1/°C	-	-	Tphb	ptp 0.0 V/°C
Trs		1/°C	-	-	x	trs 0.0 1/°C
Tbv	0.0	1/°C	-	-	TCV	tbv1 0.0 1/°C
wBv	0.0	V	-	-	-	bvj infinity V

Spectre Comments

If Eg is not given and Tlev is 0, 1, or not given, Spectre uses a proprietary model for temperature effects. Under these conditions the simulation results for Spectre will deviate from ADS as the simulation temperature varies from Tnom. In this case the model cards will need to be extracted for accurate simulation.