ISL84524 Intersil Corporation, ISL84524 Datasheet - Page 10

• Manufacturer Part Number: ISL84524
• Description: Low-Voltage/ Single Supply/ 4 to 1 Multiplexer and DPDT Analog Switches
• Manufacturer: Intersil Corporation

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
Typical Performance Curves
FIGURE 11. TURN - ON TIME vs SUPPLY VOLTAGE
FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE
250
200
150
100
350
300
250
200
150
100
50
50
0
0
3
2
-40
o
-40
4
3
85
C
85
o
o
o
C
C
C
4
5
25
o
25
C
5
6
o
C
6
7
10
V+ (V)
V+ (V)
8
7
8
9
T
10
9
A
V
= 25
V
COM
COM
I
COM
10
11
o
C, Unless Otherwise Specified
= (V+) - 1V
= (V+) - 1V
= 1mA
ISL84524, ISL84525
12
11
12
13
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.
FIGURE 12. TURN - OFF TIME vs SUPPLY VOLTAGE
120
110
100
225
200
175
150
125
100
140
120
100
90
80
70
60
50
40
30
20
10
80
60
75
80
70
60
50
40
30
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
2
0
85
-40
-40
o
o
C
3
o
C
C
85
2
o
C
4
25
25
o
o
C
C
5
-40
85
25
4
o
o
o
C
C
C
6
V
-40
85
25
COM
V+ (V)
o
o
o
7
6
C
C
C
(V)
8
8
9
V+ = 12V
V
COM
10
I
COM
10
= (V+) - 1V
V+ = 3.3V
V+ = 5V
= 1mA
11
12
12