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參數(shù)資料
| 型號(hào)： | MAX391 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Precision, Quad, SPST Analog Switches |
| 中文描述： | 高精度、四路、SPST模擬開(kāi)關(guān) |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 739K |
| 代理商： | MAX391 |
M
Precision, Quad, SPST Analog Switches
_______________________________________________________________________________________
7
__________Applications Information
Overvoltage Protection
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings, because stresses beyond the listed rat-
ings may cause permanent damage to the devices.
Always sequence V+ on first, followed by V-, and then
logic inputs. If power-supply sequencing is not possi-
ble, add two small signal diodes in series with supply
pins for overvoltage protection (Figure 1). Adding
diodes reduces the analog signal range to 1V below V+
and 1V below V-, but low switch resistance and low
leakage characteristics are unaffected. Device opera-
tion is unchanged, and the difference between V+ and
V- should not exceed 17V.
______________________________________________________________Pin Description
POSITIVE SUPPLY
COM
NEGATIVE SUPPLY
NO
Vg
V+
V-
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes
Positive Supply-Voltage Input—connected to substrate
V+
13
No Connect—not internally connected
N.C.
12
Ground
GND
5
Negative Supply-Voltage Input
V-
4
PIN
Switch Inputs
NO1–NO4
or
NC1–NC4
3, 14, 11, 6
Analog Switch Common Terminal
COM1–COM4
2, 15, 10, 7
Inputs
IN1–IN4
1, 16, 9, 8
FUNCTION
NAME
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