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Signal-Line Circuit Protectors
__High-Voltage Surge Suppression
These devices are not high-voltage arresters, nor are they
substitutes for surge suppressers. In systems that use
these forms of protection, however, the MAX366/MAX367
+5V
can fill a vital gap. Figure 7 shows a typical circuit.
Although the surge suppressers are extremely fast shunt
MAX366
V+
8
elements, they have very soft current knees. Their clamp
voltage must be chosen well above the normal signal
levels, because they have excessive leakage currents as
the knee is approached. This current can interfere with
1
2
IN1
IN2
OUT1
OUT2
7
6
normal operation when signal levels are low or imped-
ances are high. If the clamp voltage is too high, however,
3
IN3
OUT3
5
OP AMP
the input can be damaged.
Using a MAX366/MAX367 after the surge suppresser
allows the surge-suppresser voltage to be set above
the supply voltage (but within the overvoltage limits),
dramatically reducing the effects of leakage (Figure 7).
During a surge, the surge suppresser clamps the input
voltage to roughly ±10V. This protects the
MAX366/MAX367, but the MAX366/MAX367 still dis-
SURGE SUPPRESSERS
(+10V)
4
V-
-5V
connect the signal from the op amp well within the ±5V
supply.
_________________Pin Configurations
Figure 7. Surge-Suppression Circuit
___________________Chip Topography
IN1
TOP VIEW
IN1
1
18 V+
V+
IN2 2
17 OUT1
IN1 1
IN2 2
8 V+
7 OUT1
IN3 3
IN4 4
16 OUT2
15 OUT3
IN2
OUT1
0.112"
IN3 3
V- 4
6 OUT2
5 OUT3
IN5 5
IN6 6
14 OUT4
13 OUT5
(2.84mm)
MAX366
DIP/SO
IN7 7
IN8 8
12 OUT6
11 OUT7
IN3
OUT2
V- 9
10 OUT8
MAX367
DIP/SO
V-
0.085"
(2.16mm)
TRANSISTOR COUNT: 21
SUBSTRATE CONNECTED TO V+
OUT3
10
______________________________________________________________________________________
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相关代理商/技术参数
MAX367CWN+ 功能描述:隔离器接口集成电路 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
MAX367CWN+T 功能描述:隔离器接口集成电路 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 通道数量:2 传播延迟时间: 电源电压-最大:5.5 V 电源电压-最小:3 V 电源电流:3.6 mA 功率耗散: 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:SOIC-8 封装:Tube
MAX367CWN-T 功能描述:TVS二极管阵列 RoHS:否 制造商:Littelfuse 极性: 通道:4 Channels 击穿电压: 钳位电压:11.5 V 工作电压:2.5 V 峰值浪涌电流:20 A 安装风格:SMD/SMT 端接类型:SMD/SMT 系列: 最小工作温度:- 40 C 最大工作温度:+ 85 C
MAX367EPN 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX367EPN+ 功能描述:热插拔功率分布 Signal Line Circuit Protector RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX367EWN 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX367EWN+ 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube
MAX367EWN+T 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube