ISL43840_14 Datasheet, PDF (11/14 Pages) Intersil Corporation – Low-Voltage, Single and Dual Supply,Dual 4 to 1 Multiplexer Analog Switch with Enable

ISL43840
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 9. ON RESISTANCE vs SUPPLY VOLTAGE
120
110
100
I_COM = 2mA
90
80
70
60
50
90
80
70
85°C
60
50
25°C
40
-40°C
30
60
50 _25°C
40
30 _-40°C
20
-5 -4 -3
85°C
-2
-1 0 1
V_COM (V)
85°C
V_S = ±2V
25°C
-40°C
V_S = ±3V
V_S = ±5V
2345
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
225
200
175
150
125
100
75
160
140
120
100
80
60
100
90
80
70 25°C
60
50
40
0
85°C
1
85°C
25°C
-40°C
I_COM = 1mA
V+ = 2.7V
V- = 0V
85°C
25°C
-40°C
V+ = 3.3V
V- = 0V
V+ = 5V V- = 0V
2
3
V_COM (V)
-40°C
4
5
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
60
V+ = 12V
55
V- = 0V
I_COM = 1mA
50
45
85°C
40
35
30
25°C
25
-40°C
20
0
2
4
6
8
10
12
V_COM (V)
FIGURE 12. ON RESISTANCE vs SWITCH VOLTAGE
11
FN6056.2
March 13, 2006