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HSMS-2860 데이터시트 PDF




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부품번호 HSMS-2860 기능
기능 Surface Mount Microwave Schottky Detector Diodes
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HSMS-2860 데이터시트, 핀배열, 회로
HSMS-286x Series
Surface Mount Microwave Schottky Detector Diodes
Data Sheet
Description
Avago’s HSMS‑286x family of DC biased detector diodes
have been designed and optim­ized for use from 915 MHz
to 5.8 GHz.They are ideal for RF/ID and RFTag applications
as well as large signal detection, modulation, RF to DC
conversion or voltage doubling.
Available in various package ­conf­igurations, this family
of detector diodes provides low cost solutions to a wide
variety of design problems. Avago’s manufacturing
techniques assure that when two or more diodes are
mounted into a single surface mount package, they
are taken from adjacent sites on the wafer, assuring the
highest possible degree of match.
Pin Connections and Package Marking
16
25
34
Notes:
1. Package marking provides orientation and identification.
2. The first two characters are the package marking code.
The third character is the date code.
SOT-23/SOT-143 Package Lead Code Identification
(top view)
SINGLE
3
SERIES
3
12
#0
COMMON
ANODE
3
12
#2
COMMON
CATHODE
3
1 #3 2
1 #4 2
UNCONNECTED
PAIR
34
Features
Surface Mount SOT-23/SOT‑143 Packages
Miniature SOT-323 and SOT‑363 Packages
High Detection Sensitivity:
  up to 50 mV/µW at 915 MHz
  up to 35 mV/µW at 2.45 GHz
  up to 25 mV/µW at 5.80 GHz
Low FIT (Failure in Time) Rate*
Tape and Reel Options Available
Unique Configurations in Surface Mount SOT-363
Package
– increase flexibility
– save board space
– reduce cost
HSMS-286K Grounded Center Leads Provide up to
10 dB Higher Isolation
Matched Diodes for Consistent Performance
Better Thermal Conductivity for Higher Power
Dissipation
Lead-free
* For more information see the Surface Mount Schottky Reliability
Data Sheet.
SOT-323 Package Lead Code Identification (top view)
SINGLE
3
SERIES
3
1 B2
COMMON
ANODE
3
1 C2
COMMON
CATHODE
3
1E2
1 F2
SOT-363 Package Lead Code Identification (top view)
HIGH ISOLATION UNCONNECTED
UNCONNECTED PAIR
TRIO
654
654
1 #5 2
123
K
BRIDGE
QUAD
654
1 2L 3
RING
QUAD
654
1 2P 3
1 2R 3




HSMS-2860 pdf, 반도체, 판매, 대치품
Equivalent Linear Circuit Model, Diode chip
Rj
RS
Cj
RS = series resistance (see Table of SPICE parameters)
Cj = 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-286x product,
please refer to Application Note AN1124.
SPICE Parameters
Parameter Units
BV
V
CJ0
pF
EG
eV
IBV
A
IS
A
N
RS
Ω
PB (VJ)
V
PT (XTI)
M
Value
7.0
0.18
0.69
1E-5
5 E -8
1.08
6.0
0.65
2
0.5
4

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HSMS-2860 전자부품, 판매, 대치품
The characterization of the surface mount package is
too complex to describe here — linear equivalent circuits
can be found in AN1124.
Detector Circuits (small signal)
When DC bias is available, Schottky diode detector
circuits can be used to create low cost RF and
microwave receivers with a sensitivity of -55 dBm to
-57 dBm.[1] Moreover, since external DC bias sets the
video impedance of such circuits, they display classic
square law response over a wide range of input power
levels[2,3]. These circuits can take a variety of forms, but
in the most simple case they appear as shown in Figure
9. This is the basic detector circuit used with the HSMS-
286x family of diodes.
Output voltage can be virtually doubled and input
impedance (normally very high) can be halved through
the use of the voltage doubler circuit[4].
In the design of such detector circuits, the starting point
is the equivalent circuit of the diode. Of interest in the
design of the video portion of the circuit is the diode’s
video impedance — the other elements of the equiv­
alent circuit disappear at all reasonable video frequen‑
cies. In general, the lower the diode’s video impedance,
the better the design.
DC BIAS
RF Z-MATCH
IN NETWORK
L1
VIDEO
OUT
The situation is somewhat more complicated in the
design of the RF impedance matching net­work, which
includes the pack­age inductance and capacitance
(which can be tuned out), the series resistance, the
junction capacitance and the video resistance. Of the
eathrleeemccueonrnrtsRestnSaotn=fftltRsohwadeni-nddgi0ot.tdh0Ihfe2er’6sovueidgqehuoitvhr­aeelesdinsittoacdniercc.euiits,
the parasitics
a function of
RV=Rj+ RS
The sum of saturation current and bias current sets
the detection sensitivity, video resistance and input RF
impedance of the Schottky detector diode. Where bias
current is used, some tradeoff in sensitivity and square
law dynamic range is seen, as shown in Figure 5 and
described in reference [3].
The most difficult part of the design of a detector circuit
is the input impedance matching network. For very
broadband detectors, a shunt 60 Ω resistor will give good
input match, but at the expense of detection sensitivity.
When maximum sensitivity is required over a narrow
band of frequencies, a reactive matching network is
optimum. Such net­works can be realized in either lumped
or distributed elements, depending upon frequency,
size constraints and cost limitations, but certain general
design principals exist for all types.[5] Design work begins
with the RF impedance of the HSMS-286x series when
bias current is set to 3 µA. See Figure 10.
DC BIAS
RF Z-MATCH
IN NETWORK
L1
VIDEO
OUT
Figure 9. Basic Detector ­Circuits.
HSMS-285A/6A fig 12
0.2 0.6
1
2
5
1 GHz
2
3
4
65
Figure 10. RF Impedance of the Diode.
HSMS-285A/6A fig 13
[1] Avago Application Note 923, Schottky Barrier Diode Video
Detectors.
[2] Avago Application Note 986, Square Law and Linear Detection.
[3] Avago Application Note 956-5, Dynamic Range Extension of Schottky
Detectors.
[4] Avago Application Note 956-4, Schottky Diode Voltage Doubler.
[5] Avago Application Note 963, Impedance Matching Techniques for
Mixers and Detectors.
7

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