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參數資料
| 型號： | HSMS-286K |
| 英文描述： | Surface Mount RF Schottky Detector Diodes in SOT-363(表貼型射頻肖特基檢測二極管（SOT-363封裝）) |
| 中文描述： | 表面貼裝RF肖特基二極管檢測器采用SOT - 363（表貼型射頻肖特基檢測二極管（采用SOT - 363封裝）） |
| 文件頁數： | 8/12頁 |
| 文件大?。?/td> | 96K |
| 代理商： | HSMS-286K |
8
Note that the ground strip which
runs from the two via holes at the
top to the one at the bottom not
only provides ground potential for
leads 2 and 5, but it isolates the
two input/output lines.
Tests were run on the HSMS-282K
and the conventional HSMS-2825
pair, which compare with each
other in the same way as the
HSMS-2865 and HSMS-286K, with
the results shown in Figure 18.
-35
-25
-15
-5
15
5
37 dB
47 dB
O
INPUT POWER (dBm)
0.5
1000
100
10
1
5000
Frequency = 900 MHz
HSMS-2825
RV
out
response
HSMS-282K
ref. diode
Figure 18. Comparing HSMS-282K
with HSMS-2825.
The line marked “RF diode, V
out
”
is the transfer curve for the
detector diode—both the
HSMS-2825 and the HSMS-282K
exhibited the same output voltage.
The data were taken over the
50 dB dynamic range shown. To
the right is the output voltage
(transfer) curve for the reference
diode of the HSMS-2825, showing
37 dB of isolation. To the right of
that is the output voltage due to
RF leakage for the reference diode
of the HSMS-282K, demonstrating
10 dB higher isolation than the
conventional part.
Such differential detector circuits
generally use single diode
detectors, either series or shunt
mounted diodes. The voltage
doubler (HP Application Note
956-4) offers the advantage of
twice the output voltage for a
given input power. The two
concepts can be combined into
the differential voltage doubler, as
shown in Figure 19.
matching
network
bias
differential
amplifier
Figure 19. Differential Voltage
Doubler, HSMS-286P.
Here, all four diodes of the
HSMS-286P are matched in their
V
f
characteristics, because they
came from adjacent sites on the
wafer. A similar circuit can be
realized using the HSMS-286R ring
quad.
Other configurations of six lead
Schottky products can be used to
solve circuit design problems
while saving space and cost.
Thermal Considerations
The obvious advantage of the
SOT-363 over the SOT-143 is
combination of smaller size and
two extra leads. However, the
copper leadframe in the SOT-363
has a thermal conductivity four
times higher than the Alloy 42
leadframe of the SOT-143, which
enables it to dissipate more
power.
The maximum junction tempera-
ture for these three families of
Schottky diodes is 150
°
C under all
operating conditions. The follow-
ing equation, equation 1, applies
to the thermal analysis of diodes:
T
j
= (V
f
I
f
+ P
RF
)
θ
jc
+ T
a
E quation ( 1) .
where
T
j
= junction temperature
T
a
= diode case temperature
θ
jc
= thermal resistance
V
f
I
f
= DC power dissipated
P
RF
= RF power dissipated
Note that
θ
jc
, the thermal resis-
tance from diode junction to the
foot of the leads, is the sum of two
component resistances,
θ
jc
=
θ
pkg
+
θ
chip
E quation ( 2) .
Package thermal resistance for
the SOT-363 package is approxi-
mately 100
°
C/W, and the chip
thermal resistance for these three
families of diodes is approxi-
mately 40
°
C/W. The designer will
have to add in the thermal
resistance from diode case to
ambient—a poor choice of circuit
board material or heat sink design
can make this number very high.
相關PDF資料 |
PDF描述 |
|---|---|
| HSMS-286L | Surface Mount RF Schottky Detector Diodes in SOT-363(表貼型射頻肖特基檢測二極管（SOT-363封裝）) |
| HSMS-286P | Surface Mount RF Schottky Detector Diodes in SOT-363(表貼型射頻肖特基檢測二極管（SOT-363封裝）) |
| HSMS-286R | Surface Mount RF Schottky Detector Diodes in SOT-363(表貼型射頻肖特基檢測二極管（SOT-363封裝）) |
| HSMS-8205 | Surface Mount Microwave Schottky Mixer Diodes(表貼型微波肖特基混頻二極管（成對分離）) |
| HSMS-8207 | Surface Mount Microwave Schottky Mixer Diodes(表貼型微波肖特基混頻二極管（四路振鈴）) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HSMS-286K-BLKG | 功能描述:射頻檢測器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 頻率范圍:650 MHz to 3 GHz 最大二極管電容: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SC-88 封裝:Reel |
| HSMS-286K-BLKG | 制造商:Avago Technologies 功能描述:Diode |
| HSMS-286K-G | 制造商:Avago Technologies 功能描述:HSMS-286K dual microwave detector |
| HSMS-286K-TR1 | 功能描述:DIODE SCHOTTKY DETECT 4V SOT-363 RoHS:否 類別:分離式半導體產品 >> RF 二極管 系列:- 標準包裝:3,000 系列:- 二極管類型:PIN - 單 電壓 - 峰值反向(最大):50V 電流 - 最大:50mA 電容@ Vr, F:0.4pF @ 50V，1MHz 電阻@ Vr, F:4.5 歐姆 @ 10mA，100MHz 功率耗散（最大）:100mW 封裝/外殼:SC-70，SOT-323 供應商設備封裝:3-MCP 包裝:帶卷 (TR) |
| HSMS-286K-TR1G | 功能描述:射頻檢測器 4 VBR 0.3 pF RoHS:否 制造商:Skyworks Solutions, Inc. 配置: 頻率范圍:650 MHz to 3 GHz 最大二極管電容: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SC-88 封裝:Reel |
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