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PDF HMPP3890-BLK Data sheet ( Hoja de datos )
| Número de pieza | HMPP3890-BLK | |
| Descripción | (HMPP-389x) MiniPak Surface Mount RF PIN Switch Diodes | |
| Fabricantes | Hewlett-Packard | |
| Logotipo |  |
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Agilent HMPP-389x Series
MiniPak Surface Mount
RF PIN Switch Diodes
Data Sheet
Description/Applications
These ultra-miniature products
represent the blending of Agilent
Technologies’ proven semiconduc-
tor and the latest in leadless
packaging technology.
The HMPP-389x series is optimized
for switching applications where
low resistance at low current and
low capacitance are required. The
MiniPak package offers reduced
parasitics when compared to
conventional leaded diodes, and
lower thermal resistance.
Low junction capacitance of the
PIN diode chip, combined with
ultra low package parasitics, mean
that these products may be used
at frequencies which are higher
than the upper limit for conven-
tional PIN diodes.
Note thaDt aAtgaiSlehnet’est4mUa.ncuofmacturing
techniques assure that dice
packaged in pairs are taken from
adjacent sites on the wafer,
assuring the highest degree of
match.
The HMPP-389T low inductance
wide band shunt switch is well
suited for applications up to 6 GHz.
Features
• Surface mount MiniPak package
– low height, 0.7 mm (0.028") max.
– small footprint, 1.75 mm2
(0.0028 inch2)
• Better thermal conductivity for
higher power dissipation
• Single and dual versions
• Matched diodes for consistent
performance
• Low capacitance
• Low resistance at low current
• Low FIT (Failure in Time) rate*
• Six-sigma quality level
* For more information, see the Surface
Mount Schottky Reliability Data Sheet.
Pin Connections and
Package Marking
34
AA
21
Package Lead Code Identification
(Top View)
Single
Anti-parallel
Parallel
Shunt Switch
Product code Date code
Cathode Anode
Notes:
3 4 3 4 3 4 3 4 1. Package marking provides orientation and
identification.
2
#0
12
#2
12
#5
12
1 2. See “Electrical Specifications” for
Anode T Cathode
appropriate package marking.
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measure of the time it takes for the
charge stored in the I layer to
decay, when forward bias is
replaced with reverse bias, to some
predetermined value. This lifetime
can be short (35 to 200 nsec. for
epitaxial diodes) or it can be
relatively long (400 to 3000 nsec.
for bulk diodes). Lifetime has a
strong influence over a number of
PIN diode parameters, among
which are distortion and basic
diode behavior.
To study the effect of lifetime on
diode behavior, we first define a
cutoff frequency fC = 1/τ. For short
lifetime diodes, this cutoff fre-
quency can be as high as 30 MHz
while for our longer lifetime
diodes fC ≅ 400 KHz. At frequen-
cies which are ten times fC (or
more), a PIN diode does indeed
act like a current controlled
variable resistor. At frequencies
which are one tenth (or less) of fC,
a PIN diode acts like an ordinary
PN junction diode. Finally, at
0.1fC ≤ f ≤ 10fC, the behavior of the
diode is very complex. Suffice it to
mention that in this frequency
range, the diode can exhibit very
strong capacitive or inductive
reactance — it will not behave at
all like a resistor. However, at zero
bias or under heavy forward bias,
all PIN diodes demonstrate very
high or very low impedance
(respectively) no matter what
their lifetime is.
Diode Resistance vs. Forward Bias
If we look at the typical curves for
resistance vs. forward current for
bulk and epi diodes (see Figure
10), we see that they are very
different. Of course, these curves
apply only at frequencies > 10 fC.
One can see that the curve of
resistance vs. bias current for the
bulk diode is much higher than
that for the epi (switching) diode.
Thus, for a given current and
junction capacitance, the epi
diode will always have a lower
resistance than the bulk diode.
The thin epi diode, with its
physically small I region, can
easily be saturated (taken to the
point of minimum resistance) with
very little current compared to the
much larger bulk diode. While an
epi diode is well saturated at
currents around 10 mA, the bulk
diode may require upwards of
100 mA or more. Moreover, epi
diodes can achieve reasonable
values of resistance at currents of
1 mA or less, making them ideal
for battery operated applications.
Having compared the two basic
types of PIN diode, we will now
focus on the HMPP-3890 epi
diode.
Given a thin epitaxial I region, the
diode designer can trade off the
device’s total resistance (RS + Rj)
and junction capacitance (Cj) by
varying the diameter of the
contact DanadtaISrhegeieotn4.UT.choem
HMPP-3890 was designed with the
930 MHz cellular and RFID, the
1.8 GHz PCS and 2.45 GHz RFID
markets in mind. Combining the
low resistance shown in Figure 10
with a typical total capacitance of
0.27 pF, it forms the basis for high
performance, low cost switching
networks.
1000
HSMP-3880 Bulk PIN Diode
100
10
HMPP-389x
Epi PIN Diode
1
0.01 0.1 1 10
BIAS CURRENT (mA)
100
Figure 10. Resistance vs, Forward Bias.
Linear Equivalent Circuit
In order to predict the perfor-
mance of the HMPP-3890 as a
switch, 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 11,
where RS + Rj is given in Figure 1
and Cj is provided in Figure 2.
Careful examination of Figure 11
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-389x
family to be used at higher fre-
quencies than its conventional
leaded counterparts.
20 fF
3
4
30 fF 30 fF
1.1 nH
21
20 fF
Single diode package (HMPP-3890)
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-3892)
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-3895)
Figure 11. Linear Equivalent Circuit of the
MiniPak PIN Diode.
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www.agilent.com/semiconductors
For product information and a complete list of
distributors, please go to our web site.
For technical assistance call:
Americas/Canada: +1 (800) 235-0312 or
(408) 654-8675
Europe: +49 (0) 6441 92460
China: 10800 650 0017
Hong Kong: (+65) 271 2451
India, Australia, New Zealand: (+65) 271 2394
Japan: (+81 3) 3335-8152(Domestic/International), or
0120-61-1280(Domestic Only)
Korea: (+65) 271 2194
Malaysia, Singapore: (+65) 271 2054
Taiwan: (+65) 271 2654
Data subject to change.
Copyright © 2002 Agilent Technologies, Inc.
DataSheet4U.cOobsmoletes 5988-4071EN
February 20, 2002
5988-5733EN
DataSheet4 U .com
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