Spice Models for Metelics Step Recovery Diodes

Spice does not include the step recovery diode's transition time in the diode model.

Example of Model for MMD805

.MODEL D_805 (IS=500.0E-15 N=1.3 RS=0.13 CJ0=4.55 VJ=0.5 M=0.235 XTI=3.0 EG=1.12 BV=60 IBV=10E-6 TT=30E-9)

Parameters common to all part numbers
Is=100fA to 1pA
N=1.2 to 1.4
VJ=0.5
M=0.235
EG=1.12
XTI=3
 

Part Number

Rs

CJ0, pF

Cj6, pF

Minimum vbr, v

TT, ns

MMD-805

0.13

4.55 to 6.37

2.5 to 3.5

60

30

MMD-810

0.13

2.73 to 4.55

1.5 to 2.5

50

30

MMD-820

0.13

1.82 to 3.09

1.0 to 1.7

40

30

MMD-830

0.13

0.91 to 1.82

0.5 to 1.0

25

20
MMD-832
0.15
0.73 to 1.46
0.4 to 0.8
20
12
MMD-835
0.19
0.55 to 1.27
0.3 to 0.7
15
10
MMD-837
0.22
0.36 to 0.73
0.2 to 0.4
20
10
MMD-840
0.22
0.36 to 0.73
0.2 to 0.4
15
10
 

Part Number

CJ0, pF

Cj6, pF

Minimum vbr, v

TT, ns

MMDB-30

0.46

0.25

14

5

MMDB-35

0.36

0.20

16

5

MMDB-45
0.36
0.20
25
5

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© 2004 Aeroflex / Metelics, Inc.
Last Revised 3-11-04