參數(shù)資料
型號(hào): DG409DJ
廠商: Intersil
文件頁(yè)數(shù): 16/17頁(yè)
文件大小: 0K
描述: IC MULTIPLEXER DUAL 4X1 16DIP
標(biāo)準(zhǔn)包裝: 25
功能: 多路復(fù)用器
電路: 2 x 4:1
導(dǎo)通狀態(tài)電阻: 100 歐姆
電壓電源: 單/雙電源
電壓 - 電源,單路/雙路(±): 5 V ~ 34 V,±5 V ~ 20 V
電流 - 電源: 200µA
工作溫度: -40°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 16-PDIP
包裝: 管件
8
FN3283.8
June 13, 2006
Typical Applications
Overvoltage Protection
A very convenient form of overvoltage protection consists of
adding two small signal diodes (1N4148, 1N914 type) in
series with the supply pins (see Figure 9). This arrangement
effectively blocks the flow of reverse currents. It also floats
the supply pin above or below the normal V+ or V- value. In
this case the overvoltage signal actually becomes the power
supply of the IC. From the point of view of the chip, nothing
has changed, as long as the difference V+ - (V-) doesn’t
exceed 44V. The addition of these diodes will reduce the
analog signal range to 1V below V+ and 1V above V-, but it
preserves the low channel resistance and low leakage
characteristics.
Typical application information is for Design Aid Only, not
guaranteed and not subject to production testing.
FIGURE 7. INSERTION LOSS
FIGURE 8. SOURCE/DRAIN CAPACITANCES
Test Circuits and Waveforms (Continued)
A2
GND
A1
EN
D
V
-
V+
VO
+15V
-15V
A0
SIGNAL
GENERATOR
VIN
5V
RL
ANALYZER
INSERTION LOSS
20 Log
VOUT
VIN
-----------------
=
S1
IMPEDANCE
ANALYZER
A2
GND
A1
EN
V
-
V+
+15V
-15V
A0
CHANNEL
SELECT
3V OR 0V
S8
S1
|
D
1N4148
DG408
V
-
VG
SX
V+
D
FIGURE 9. OVERVOLTAGE PROTECTION USING BLOCKING
DIODES
DG408, DG409
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