參數(shù)資料
型號： ISL43122
廠商： Intersil Corporation
英文描述： Low-Voltage, Single Supply, Dual SPST Analog Switches(低壓，單電源，雙單刀單擲模擬開關)
中文描述： 低電壓，單電源，雙路SPST模擬開關（低壓，單電源，雙單刀單擲模擬開關）
文件頁數(shù)： 9/12頁
文件大小： 319K
代理商： ISL43122
9
FN6033.5
October 18, 2007
Leakage Considerations
Reverse ESD protection diodes are internally connected
between each analog-signal pin and both V+ and GND. One of
these diodes conducts if any analog signal exceeds V+ or
GND.
Virtually all the analog leakage current comes from the ESD
diodes to V+ or GND. Although the ESD diodes on a given
signal pin are identical and therefore fairly well balanced, they
are reverse biased differently. Each is biased by either V+ or
GND and the analog signal. This means their leakages will vary
as the signal varies. The difference in the two diode leakages to
the V+ and GND pins constitutes the analog-signal-path
leakage current. All analog leakage current flows between each
pin and one of the supply terminals, not to the other switch
terminal. This is why both sides of a given switch can show
leakage currents of the same or opposite polarity. There is no
connection between the analog signal paths and V+ or GND.
Typical Performance Curves
T
A
= +25°C, Unless Otherwise Specified
FIGURE 9. ON-RESISTANCE vs SUPPLY VOLTAGE
FIGURE 10. ON-RESISTANCE vs SWITCH VOLTAGE
FIGURE 11. r
ON
MATCH vs SWITCH VOLTAGE
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
r
O
Ω
)
V+ (V)
35
25
15
5
3
4
5
6
7
8
9
10
11
12
13
+25°C
-40°C
+85°C
10
20
30
40
r
O
Ω
)
V
COM
(V)
15
10
5
0
4
6
8
10
12
20
2
20
15
10
25
25
20
15
30
30
40
35
45
V+ = 3.3V
V+ = 5V
V+ = 12V
+25°C
-40°C
+85°C
+25°C
-40°C
+85°C
+25°C
-40°C
+85°C
-40°C
Δ
r
O
Ω
)
V
COM
(V)
0.10
0
0
4
6
8
10
12
0.05
0.15
2
V+ = 3.3V
V+ = 5V
V+ = 12V
+25°C
-40°C
+85°C
0.10
0.05
0.15
0
0.20
0.25
+25°C
-40°C
+85°C
0.20
0.10
0.30
0
0.40
0.50
+25°C
-40°C
+85°C
+85°C
+25°C
Q
V
COM
(V)
60
40
20
0
-20
0
4
6
8
10
12
-10
10
30
50
V+ = 3.3V
2
V+ = 5V
V+ = 12V
ISL43120, ISL43121, ISL43122
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