參數(shù)資料
型號(hào): DG409AK-E3
廠商: VISHAY SILICONIX
元件分類: 多路復(fù)用及模擬開關(guān)
英文描述: 4-CHANNEL, DIFFERENTIAL MULTIPLEXER, CDIP16
封裝: ROHS COMPLIANT, CERAMIC, DIP-16
文件頁數(shù): 4/13頁
文件大小: 143K
代理商: DG409AK-E3
www.vishay.com
Document Number: 70062
12
S10-1474-Rev. I, 05-Jul-10
DG408, DG409
Vishay Siliconix
APPLICATION HINTS
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 10). 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 VS - (V-) does not
exceed + 44 V. The addition of these diodes will reduce the
analog signal range to 1 V below V+ and 1 V above V-, but it
preserves the low channel resistance and low leakage
characteristics.
Fig. 10 - Overvoltage Protection Using Blocking Diodes
Fig. 11
Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon
Technology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and
reliability data, see www.vishay.com/ppg?70062.
1N4148
DG408
D
V-
V+
1N4148
SX
Vg
EN
A0
A1
+ 15 V
(MUX On-Off Control)
Analog
Inputs
(Outputs)
Clock
In
NC
Enable In
Analog
Output
(Input)
+ 15 V
- 15 V
DG408
D
EN
GND
DM7493
V+
V-
NC
GND
+ 15 V
Analog
Inputs
(Outputs)
Analog
Outputs
(Inputs)
+ 15 V
- 15 V
DG409
GND
V+
V-
Differential
Clock
In
NC
GND
+ 15 V
NC
6
Reset Enable
J
K
CLK
J
K
CLK
CLEAR
Q
S5
S7
S6
S8
S1
S3
S2
S4
S1a
S3a
S2a
S4a
S1b
S3b
S2b
S4b
Da
Db
A0
A1
A2
BIN
AIN
r01
r02
QB
QC
QD
QA
1/2 MM74C73
Q
8-Channel Sequential Multiplexer/Demultiplexer
Differential 4-Channel Sequential Multiplexer/Demultiplexer
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