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参数资料
型号： HCPL-3700S
厂商： FAIRCHILD SEMICONDUCTOR CORP
元件分类： 光电耦合器
英文描述： AC/DC TO LOGIC INTERFACE OPTOCOUPLER
中文描述： 1 CHANNEL LOGIC OUTPUT OPTOCOUPLER
封装： SURFACE MOUNT PACKAGE-8
文件页数： 13/13页
文件大小： 119K
代理商： HCPL-3700S
13
Electrical Considerations
The HCPL-0370/3700/3760
optocouplers have internal
temperature compensated,
predictable voltage and current
threshold points which allow
selection of an external resistor,
R
X
, to determine larger external
threshold voltage levels. For a
desired external threshold
voltage, V
±
, a corresponding
typical value of R
X
can be ob-
tained from Figure 12. Specific
calculation of R
X
can be obtained
from Equation (1). Specification
of both V
+
and V
-
voltage
threshold levels simultaneously
can be obtained by the use of R
X
and R
P
as shown in Figure 13 and
determined by Equations (2) and
(3).
R
X
can provide over-current
transient protection by limiting
input current during a transient
condition. For monitoring con-
tacts of a relay or switch, the
HCPL-0370/3700/3760 in
combination with R
X
and R
P
can
be used to allow a specific current
to be conducted through the
contacts for cleaning purposes
(wetting current).
The choice of which input voltage
clamp level to choose depends
upon the application of this
device (see Figure 1). It is recom-
mended that the low clamp
condition be used when possible.
The low clamp condition in
conjunction with the low input
current feature will ensure
extremely low input power
dissipation.
In applications where dV
CM
/dt
may be extremely large (such as
static discharge), a series resistor,
R
CC
, should be connected in
series with V
CC
and Pin 8 to pro-
tect the detector IC from destruc-
tively high surge currents. See
Note 13 for determination of R
CC
.
In addition, it is recommended
that a ceramic disc bypass
capacitor of 0.01
μ
F be placed
between Pins 8 and 5 to reduce
the effect of power supply noise.
For interfacing ac signals to TTL
systems, output low pass filtering
can be performed with a pullup
resistor of 1.5 k
and 20
μ
F
capacitor. This application
requires a Schmitt trigger gate to
avoid slow rise time chatter
problems. For ac input applica-
tions, a filter capacitor can be
placed across the dc input
terminals for either signal or
transient filtering.
Either ac (Pins 1, 4) or dc
(Pins 2, 3) input can be used to
determine external threshold
levels.
For one specifically selected
external threshold voltage level
V
+
or V
-
, R
X
can be determined
without use of R
P
via
V
- V
TH+
(-)
R
X
=
I
TH+
(-)
(-)
(1)
V
+
V
TH+
V
+
- V
TH+
I
TH+
≥
and
<
V
-
V
TH-
V
-
- V
TH-
I
TH-
Conversely, if the denominator of
equation (2) is negative, then
V
+
V
TH+
V
+
- V
TH+
I
TH+
≤
and
>
V
-
V
TH-
V
-
- V
TH-
I
TH-
V
TH-
(V
+
) - V
TH+
(V
-
)
R
X
=
(2)
I
TH+
(V
TH-
) - I
TH-
(V
TH+
)
V
TH-
(V
+
) - V
TH+
(V
-
)
R
P
=
(3)
I
TH+
(V
-
-V
TH-
)+ I
TH-
(V
TH+
-V
+
)
Figure 13. External Threshold Voltage Level Selection.
For two specifically selected
external threshold voltage levels,
V
+
and V
-
, the use of R
X
and R
P
will permit this selection via
equations (2), (3) provided the
following conditions are met. If
the denominator of equation (2)
is positive, then
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
(916) 788-6763
Europe: +49 (0) 6441 92460
China: 10800 650 0017
Hong Kong: (+65) 6756 2394
India, Australia, New Zealand: (+65) 6755 1939
J apan: (+81 3) 3335-8152 (Domestic/Interna-
tional), or 0120-61-1280 (Domestic Only)
Korea: (+65) 6755 1989
Singapore, Malaysia, Vietnam, Thailand,
Philippines, Indonesia: (+65) 6755 2044
Taiwan: (+65) 6755 1843
Data subject to change.
Copyright 2004 Agilent Technologies, Inc.
Obsoletes 5989-0785EN
December 20, 2004
5989-2101EN
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相关代理商/技术参数
参数描述
HCPL3700S 制造商:Fairchild Semiconductor Corporation 功能描述:OPTOCOUPLER
HCPL3700SD 功能描述:逻辑输出光电耦合器 Optocoupler aC/DC to Logic RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube
HCPL3700SDV 功能描述:逻辑输出光电耦合器 Optocoupler aC/DC to Logic RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube
HCPL3700SV 功能描述:逻辑输出光电耦合器 Optocoupler aC/DC to Logic RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube
HCPL3700V 功能描述:逻辑输出光电耦合器 Optocoupler aC/DC to Logic RoHS:否 制造商:Fairchild Semiconductor 绝缘电压:4243 Vrms 输出类型:Push-Pull 最大传播延迟时间:500 ns 最大正向二极管电压: 最大反向二极管电压: 最大正向二极管电流: 最大连续输出电流:2.5 A 最大功率耗散:100 mW 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:SO-16 封装:Tube
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