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HSMP-3895-TR1G
HSMP-3895-TR1G | |
|---|---|
| Manufacturer Part Number | HSMP-3895-TR1G |
| Description | DIODE PIN SWITCH 100V SOT-143 |
| Manufacturer | Avago Technologies US Inc. |
| HSMP-3895-TR1G datasheets |
|
Availability: By request
International delivery:
Warranty: 60 days
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Specifications of HSMP-3895-TR1G | |||
|---|---|---|---|
| Diode Type | PIN - 2 Independant | Voltage - Peak Reverse (max) | 100V |
| Current - Max | 1A | Capacitance @ Vr, F | 0.3pF @ 5V, 1MHz |
| Resistance @ If, F | 2.5 Ohm @ 5mA, 100MHz | Package / Case | SOT-143, SOT-143B, TO-253AA |
| Diode Case Style | SOT-23 | No. Of Pins | 3 |
| Capacitance Ct | 0.2pF | Pin Configuration | Unconnected Pair |
| Termination Type | SMD | Mounting Type | Surface Mount |
| Breakdown Voltage | 100V | Filter Terminals | SMD |
| Rohs Compliant | Yes | Capacitance | 0.2pF |
| Forward Test Current If | 1A | Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
| Power Dissipation (max) | - | ||
PrevNext
Typical Applications for HSMP-489x Low Inductance Series
Microstrip Series Connection for HSMP-489x Series
In order to take full advantage of the low inductance
of the HSMP-489x series when using them in series ap-
plications, both lead 1 and lead 2 should be connected
together, as shown in Figure 17.
3
1
2
HSMP-489x
Figure 16. Internal Connections.
Figure 16. Internal Connections.
Figure 17. Circuit Layout.
Figure 17. Circuit Layout.
Microstrip Shunt Connections for HSMP-489x Series
In Figure 18, the center conductor of the microstrip line
is interrupted and leads 1 and 2 of the HSMP-489x diode
are placed across the resulting gap. This forces the 1.5
nH lead inductance of leads 1 and 2 to appear as part of
a low pass filter, reducing the shunt parasitic inductance
and increasing the maximum available attenuation. The
0.3 nH of shunt inductance external to the diode is cre-
ated by the via holes, and is a good estimate for 0.032"
thick material.
50 OHM MICROSTRIP LINES
PAD CONNECTED TO
GROUND BY TWO
VIA HOLES
Figure 18. Circuit Layout.
Figure 18. Circuit Layout.
1.5 nH
1.5 nH
0.3 pF
0.3 nH
0.3 nH
Figure 19. Equivalent Circuit.
Figure 19. Equivalent Circuit.
7
Equivalent Circuit Model
HSMP-389x Chip*
R
R
s
j
0.5 Ω
C
j
0.12 pF*
* Measured at -20 V
R
= 0.5 + R
T
j
C
= C
+ C
T
P
j
20
Ω
R
=
j
0.9
I
I = Forward Bias Current in mA
* See AN1124 for package models
Co-Planar Waveguide Shunt Connection for HSMP-489x Series
Co-Planar waveguide, with ground on the top side of
the printed circuit board, is shown in Figure 20. Since
it eliminates the need for via holes to ground, it offers
lower shunt parasitic inductance and higher maximum
attenuation when compared to a microstrip circuit.
Co-Planar Waveguide
Groundplane
Center Conductor
Groundplane
Figure 20. Circuit Layout.
Figure 20. Circuit Layout.
0.3 pF
0.75 nH
Figure 21. Equivalent Circuit.
Figure 21. Equivalent Circuit.
A SPICE model is not available for PIN diodes as SPICE
does not provide for a key PIN diode characteristic, car-
rier lifetime.
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|
|
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