ISL84514 Intersil Corporation, ISL84514 Datasheet - Page 8

• Manufacturer Part Number: ISL84514
• Description: Low-Voltage/ Single Supply/ SPST/ 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
50
40
30
20
10
FIGURE 9. CHARGE INJECTION vs SWITCH VOLTAGE
0
25
20
15
10
0
5
FIGURE 7. ON RESISTANCE vs SUPPLY VOLTAGE
3
-40
4
o
C
1
5
85
V+ = 3.3V
o
C
6
2
25
7
V
o
8
COM
C
V+ (V)
8
(V)
3
9
T
10
A
V
I
= 25
COM
COM
V+ = 5V
4
11
o
= 1mA
= (V+) - 1V
C, Unless Otherwise Specified
ISL84514, ISL84515
12
13
5
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 10. DIGITAL SWITCHING POINT vs SUPPLY VOLTAGE
3.0
2.5
2.0
1.5
1.0
0.5
19
17
15
13
25
20
15
10
11
14
12
10
2
FIGURE 8. ON RESISTANCE vs SWITCH VOLTAGE
9
7
8
6
4
0
-40
3
o
C
85
4
o
2
C
5
25
25
-40
85
85
25
o
4
o
o
C
o
6
o
o
C
C
C
C
C
V
85
7
-40
85
25
V+ (V)
COM
I
COM
o
o
o
o
C
C
6
C
C
8
(V)
= 1mA
9
25
-40
8
o
o
C
C
10
-40
11
o
10
C
V+ = 3.3V
V+ = 12V
V+ = 5V
V
INH
12
V
INL
12
13