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零件编号 | HSMS-2820 | ||
描述 | Surface Mount RF Schottky Barrier Diodes | ||
制造商 | AVAGO | ||
LOGO | |||
1 Page
HSMS-282x
Surface Mount RF Schottky Barrier Diodes
Data Sheet
Description/Applications
These Schottky diodes are specifically designed for both
analog and digital applications. This series offers a wide
range of specifications and package configurations to
give the d esigner wide flexib ility. Typical applications of
these Schottky diodes are mixing, detecting, switching,
sampling, clamping, and wave shaping. The HSMS‑282x
series of diodes is the best all-around choice for most
applications, featuring low series resistance, low forward
voltage at all current levels and good RF characteristics.
Note that Avago’s manufacturing techniques assure that
dice found in pairs and quads are taken from adjacent
sites on the wafer, assuring the highest degree of match.
Package Lead Code Identification,
SOT-23/SOT-143 (Top View)
SINGLE
3
SERIES
3
COMMON
ANODE
3
COMMON
CATHODE
3
Features
• Low Turn-On Voltage (As Low as 0.34 V at 1 mA)
• Low FIT (Failure in Time) Rate*
• Six-sigma Quality Level
• Single, Dual and Quad Versions
• Unique Configurations in Surface Mount SOT-363 Package
– increase flexibility
– save board space
– reduce cost
• HSMS-282K Grounded Center Leads Provide up to 10
dB Higher Isolation
• Matched Diodes for Consistent Performance
• Better Thermal Conductivity for Higher Power Dissipation
• Lead-free Option Available
* For more information see the Surface Mount Schottky Reliability
Data Sheet.
Package Lead Code Identification, SOT-363
(Top View)
HIGH ISOLATION
UNCONNECTED PAIR
654
UNCONNECTED
TRIO
654
1 #0 2
UNCONNECTED
PAIR
34
1 #2 2
RING
QUAD
34
1 #3 2
BRIDGE
QUAD
34
1 #4 2
CROSS-OVER
QUAD
34
123
K
COMMON
CATHODE QUAD
654
123
L
COMMON
ANODE QUAD
654
1 #5 2
1 #7 2
1 #8 2
Package Lead Code Identification, SOT-323
(Top View)
SINGLE
SERIES
1 #9 2
B
COMMON
ANODE
C
COMMON
CATHODE
1 2M 3
BRIDGE
QUAD
654
1 2P 3
1 2N 3
RING
QUAD
654
1 2R 3
EF
RF in
68
D2 R3
C2
D1
V–
R4
R1
C1
V+
R2
D3
D4
C1 = C2 ª 100 pF
R1 = R2 = R3 = R4 = 4.7 K
D1 & D2 & D3 & D4 = HSMS-282R
Figure 19. Schematic of Suppressed Harmonic Detector.
Both of these networks require a crossover or a three di‑
mensional circuit. A planar mixer can be made using the
SOT‑143 crossover quad, HSMS‑2829, as shown in Figure
22. In this product, a special lead frame permits the cross‑
over to be placed inside the plastic package itself, elimi‑
nating the need for via holes (or other measures) in the RF
portion of the circuit itself.
HSMS-2829
LO in
RF in
HSMS-282R
4.7 K
4.7 K
V+
100 pF
V–
100 pF
RF in
68
Figure 20. Layout of Suppressed Harmonic Detector.
Note that the forgoing discussion refers to the output volt‑
age being extracted at point V+ with respect to ground. If
a differential output is taken at V+ with respect to V‑, the
circuit acts as a voltage doubler.
Mixer applications
The HSMS‑282x family, with its wide variety of packaging,
can be used to make excellent mixers at frequencies up
to 6 GHz.
The HSMS‑2827 ring quad of matched diodes (in the
SOT‑143 package) has been designed for double balanced
mixers. The smaller (SOT‑363) HSMS-282R ring quad can
similarly be used, if the quad is closed with external con‑
nections as shown in Figure 21.
LO in
HSMS-282R
RF in
Figure 21. Double Balanced Mixer.
IF out
IF out
Figure 22. Planar Double Balanced Mixer.
A review of Figure 21 may lead to the question as to why
the HSMS‑282R ring quad is open on the ends. Distortion
in double balanced mixers can be reduced if LO drive is
increased, up to the point where the Schottky diodes are
driven into saturation. Above this point, increased LO
drive will not result in improvements in distortion. The use
of expensive high barrier diodes (such as those fabricated
on GaAs) can take advantage of higher LO drive power,
but a lower cost solution is to use a eight (or twelve) diode
ring quad. The open design of the HSMS-282R permits this
to easily be done, as shown in Figure 23.
LO in
RF in
HSMS-282R
IF out
Figure 23. Low Distortion Double Balanced Mixer.
This same technique can be used in the single-balanced
mixer. Figure 24 shows such a mixer, with two diodes in
each spot normally occupied by one. This mixer, with a
sufficiently high LO drive level, will display low distortion.
RF in
HSMS-282R
180
hybrid
Low pass
filter
IF out
LO in
Figure 24. Low Distortion Balanced Mixer.
Note 4. Alan Rixon and Raymond W. Waugh, “A Suppressed Harmonic Power Detector for Dual Band ‘Phones,” to be published.
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页数 | 15 页 | ||
下载 | [ HSMS-2820.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
HSMS-2820 | Surface Mount RF Schottky Barrier Diodes | HP |
HSMS-2820 | Surface Mount RF Schottky Barrier Diodes | AVAGO |
HSMS-2820-BLK | Surface Mount RF Schottky Barrier Diodes | Agilent(Hewlett-Packard) |
HSMS-2820-BLK | Surface Mount RF Schottky Barrier Diodes | Agilent(Hewlett-Packard) |
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