ISL43140 Intersil Corporation, ISL43140 Datasheet - Page 11

• Manufacturer Part Number: ISL43140
• Description: Low-Voltage, Single And Dual Supply, High Performance, Quad Spst, Analog Switches
• Manufacturer: Intersil Corporation

Leakage Considerations
Reverse ESD protection diodes are internally connected
between each analog-signal pin and both V+ and V-. One
of these diodes conducts if any analog signal exceeds V+
or V-.
Virtually all the analog leakage current comes from the ESD
diodes to V+ or V-. 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 V- and the analog signal. This means their leakages
Typical Performance Curves
FIGURE 9. ON RESISTANCE vs POSITIVE SUPPLY VOLTAGE
120
100
180
140
100
100
120
100
300
250
200
150
100
90
70
50
30
80
60
40
60
50
90
80
70
60
50
40
80
60
40
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
0
-5
2
I
85
-40
COM
25
-40
o
-40
o
o
C
-4
3
C
C
o
= 1mA
o
C
85
C
o
C
4
-3
85
o
25
C
5
-2
o
C
85
o
6
C
-1
V+ (V)
11
V
7
COM
85
V- = -5V
V- = 0V
V- = -3V
0
o
C
(V)
8
85
25
o
1
C
o
C
9
T
2
A
ISL43140, ISL43141, ISL43142
10
V
-40
V
I
25
= 25
COM
S
COM
25
o
o
=
C
C
o
3
±
11
o
C
= 1mA
5V
25
-40
= (V+) - 1V
C, Unless Otherwise Specified
V
V
o
S
S
o
C
12
C
=
=
-40
4
±
±
o
2V
3V
C
13
5
will vary as the signal varies. The difference in the two diode
leakages to the V+ and V- 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 GND.
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
250
200
150
100
135
115
-2.5
-7.5
2.5
-10
95
75
55
50
80
70
60
50
40
30
20
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
-5
5
0
-5
0
-40
V
S
o
1
= ±5V
C
85
-2.5
o
2
C
3
-40
25
0
85
25
V+ = 5V
o
o
o
o
V+ = 3V
4
C
C
C
C
2.5
5
V
85
25
-40
V
COM
COM
o
o
o
C
C
6
C
(V)
V+ = 3V
(V)
V- = 0V
5
7
V+ = 12V
V+ = 5V
V- = 0V
V- = 0V
8
7.5
V+ = 12V
9
I
COM
10
10
= 1mA
11
12.5
12