ISL84581_14 Datasheet, PDF (11/15 Pages) Intersil Corporation – Low-Voltage, Single and Dual Supply,8-to-1 Multiplexer

ISL84581
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
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.
Typical Performance Curves T_A = +25°C, Unless Otherwise Specified
70
V- = -5V
V_COM = (V+) - 1V
60
I_COM = 1mA
50
+85°C
40
+25°C
30
-40°C
20
400
V- = 0V
300
200
+85°C
+25°C
100
-40°C
0
2 3 4 5 6 7 8 9 10 11 12
V+ (V)
FIGURE 8. ON-RESISTANCE vs SUPPLY VOLTAGE
120
110
100
I_COM = 1mA
90
80
70
60
50
90
80
70
+85°C
60
50
+25°C
40
-40°C
30
60
50 _+25°C
+85°C
40
+85°C ^{VS = ±2V}
+25°C
-40°C
V_S = ±3V
V_S = ±5V
30 _-40°C
20
-5 -4 -3 -2 -1 0 1 2 3 4 5
V_COM (V)
FIGURE 9. ON-RESISTANCE vs SWITCH VOLTAGE
225
200
I_COM = 1mA
175
150
+85°C
125
100
+25°C
-40°C
V+ = 2.7V
V- = 0V
75
160
140
120
+85°C
100
80
60
100
90
80
70 +25°C
60
50
40
0
+85°C
1
+25°C V+ = 3.3V
-40°C _{V- = 0V}
V+ = 5V V- = 0V
2
3
V_COM (V)
-40°C
4
5
FIGURE 10. ON-RESISTANCE vs SWITCH VOLTAGE
11
60
V+ = 12V
I_COM = 1mA
55
V- = 0V
50
45
+85°C
40
35
30
+25°C
25
-40°C
20
0
2
4
6
8
10
12
V_COM (V)
FIGURE 11. ON-RESISTANCE vs SWITCH VOLTAGE
FN6416.3
April 13, 2009