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| 型号： | ICL7665SCBA |
| 厂商： | Intersil |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | IC VOLT DETECTOR OVER/UND 8-SOIC |
| 标准包装： | 980 |
| 类型： | 多压监控器 |
| 监视电压数目： | 2 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 高有效 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
ICL7665S
R P2
V IN
V+
R P1
V OUT
OFF
R 21
R 11
OUT1
SET1
OUT2
SET2
R 22
R 12
ON
V TR2
DETECTOR 2
V NOM
V TR1
DETECTOR 1
FIGURE 9A. CIRCUIT CONFIGURATION
FIGURE 9B. TRANSFER CHARACTERISTICS
FIGURE 9. SIMPLE THRESHOLD DETECTOR
V IN
OUT
ON
R 31
R 21
HYST1
SET1
V+
HYST2
SET2
R 32
R 22
OUT1
OUT2
OFF
V L2 V U2
V L1 V U1
V IN
OVERVOLTAGE
OVERVOLTAGE
V NOM
R 11
R 12
DETECTOR 2
DETECTOR 1
FIGURE 10A. CIRCUIT CONFIGURATION
FIGURE 10B. TRANSFER CHARACTERISTICS
FIGURE 10. THRESHOLD DETECTOR WITH HYSTERESIS
V TR2 = V SET2 ---------------------------------- = 1.3 ---------------------------------- for detector 2
R R
Either detector may be used alone, as well as both together,
in any of the circuits shown here.
When V IN is very close to one of the trip voltage, normal
variations and noise may cause it to wander back and forth
across this level, leading to erratic output ON and OFF
conditions. The addition of hysteresis, making the trip points
slightly different for rising and falling inputs, will avoid this
condition.
Threshold Detector with Hysteresis
Figure 10A shows how to set up such hysteresis, while
Figure 10B shows how the hysteresis around each trip point
produces switching action at different points depending on
whether V IN is rising or falling (the arrows indicated direction
of change. The HYST outputs are basically switches which
short out R 31 or R 32 when V IN is above the respective trip
point. Thus if the input voltage rises from a low value, the trip
point will be controlled by R 1N , R 2N , and R 3N , until the trip
point is reached. As this value is passed, the detector
changes state, R 3N is shorted out, and the trip point
8
becomes controlled by only R 1N and R 2N , a lower value.
The input will then have to fall to this new point to restore the
initial comparator state, but as soon as this occurs, the trip
point will be raised again.
An alternative circuit for obtaining hysteresis is shown in
Figure 11. In this configuration, the HYST pins put the extra
resistor in parallel with the upper setting resistor. The values
of the resistors differ, but the action is essentially the same.
The governing Equations are given in Table 1. These ignore
the effects of the resistance of the HYST outputs, but these
can normally be neglected if the resistor values are above
about 100k Ω .
( R 12 + R 22 ) ( R 12 + R 22 )
12 12
FN3182.9
July 22, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICL7665SCBA-T | 功能描述:IC VOLT DETECTOR OVER/UND 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 监控器 系列:- 标准包装:100 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:- 复位:低有效 复位超时:最小为 100 ms 电压 - 阀值:4.38V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:8-TSSOP 包装:管件 |
| ICL7665SCBAZ | 功能描述:电压监测器/监控器 CMOS OVER/UNDERV DETCETOR 8 COM RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| ICL7665SCBAZA | 功能描述:电压监测器/监控器 W/ANNEAL CMOS OVER/ UNDER V DETECTOR RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| ICL7665SCBAZA-T | 功能描述:电压监测器/监控器 W/ANNEAL CMOS OVER/ UNDER V DETECTOR RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
| ICL7665SCBAZ-T | 功能描述:电压监测器/监控器 CMOS OVER/UNDER V DETECTOR 8 COIC COM RoHS:否 制造商:Texas Instruments 监测电压数:2 监测电压:Adjustable 输出类型:Open Drain 欠电压阈值: 过电压阈值: 准确性:1 % 工作电源电压:1.5 V to 6.5 V 工作电源电流:1.8 uA 最大工作温度:+ 125 C 封装 / 箱体:SON-6 安装风格:SMD/SMT |
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