HSMS-2817-BLK View Datasheet(PDF) - HP => Agilent Technologies
Part Name
Description
Manufacturer
HSMS-2817-BLK Datasheet PDF : 10 Pages
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3
Quad Capacitance
Capacitance of Schottky diode
quads is measured using an
HP4271 LCR meter. This
instrument effectively isolates
individual diode branches from
the others, allowing accurate
capacitance measurement of each
branch or each diode. The
conditions are: 20 mV R.M.S.
voltage at 1 MHz. Agilent defines
this measurement as “CM”, and it
is equivalent to the capacitance of
the diode by itself. The equivalent
diagonal and adjacent
capacitances can then be
calculated by the formulas given
below.
In a quad, the diagonal capaci-
tance is the capacitance between
points A and B as shown in the
figure below. The diagonal
capacitance is calculated using
the following formula
CDIAGONAL = _C_1_x__C_2_ + _C__3 _x_C__4
C1 + C2 C3 + C4
C1
C
C2
A
C3
C4
B
The equivalent adjacent
capacitance is the capacitance
between points A and C in the
figure below. This capacitance is
calculated using the following
formula
CADJACENT = C1 + _______1_____
11 1
–– + –– + ––
C2 C3 C4
Linear Equivalent Circuit, Diode Chip
Rj
RS
Cj
RS = series resistance (see Table of SPICE parameters)
C j = junction capacitance (see Table of SPICE parameters)
Rj =
8.33 X 10-5 nT
Ib + Is
where
Ib = externally applied bias current in amps
Is = saturation current (see table of SPICE parameters)
T = temperature, °K
n = ideality factor (see table of SPICE parameters)
Note:
To effectively model the packaged HSMS-281x product,
please refer to Application Note AN1124.
SPICE Parameters
Parameter Units HSMS-281x
BV
V
25
CJ0
pF
1.1
EG
eV
0.69
IBV
A
E-5
IS
A
4.8E - 9
N
1.08
RS
Ω
10
PB
V
0.65
PT
2
M
0.5
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