HMPP-3860 Datasheet, PDF (6/10 Pages) Broadcom Corporation. – MiniPak Surface Mount RF PIN Diodes

Linear Equivalent Circuit
In order to predict the performance of the HMPP-386x
as a switch or an attenuator, it is necessary to ­construct a
model which can then be used in one of the several linear
analysis programs presently on the market. Such a model
is given in Figure 16, where R_S + R_j is given in Figure 2 and
C_j is provided in Figure 1. Careful examination of Figure 16
will reveal the fact that the package parasitics (inductance
and capacitance) are much lower for the MiniPak than they
are for leaded plastic packages such as the SOT-23, SOT-
323 or ­others. This will permit the HMPP-386x family to be
used at higher frequencies than its conventional leaded
counterparts.
20 fF
3
4
30 fF
30 fF
1.1 nH
2
1
20 fF
Single diode package (HMPP-3860)
20 fF
0.05 nH
3
30 fF
0.05 nH
2
0.5 nH 0.5 nH
0.5 nH
12 fF
0.5 nH
0.05 nH
4
30 fF
0.05 nH
1
20 fF
Anti-parallel diode package (HMPP-3862)
20 fF
0.05 nH
3
30 fF
0.05 nH
2
0.5 nH 0.5 nH
0.5 nH
12 fF
0.5 nH
0.05 nH
4
30 fF
0.05 nH
1
20 fF
Parallel diode package (HMPP-3865)
Figure 11. Linear Equivalent Circuit of the MiniPak 1412 PIN Diode.