ISL43140_04 Datasheet, PDF (11/16 Pages) Intersil Corporation – Low-Voltage, Single and Dual Supply, High Performance, Quad SPST, Analog Switches

ISL43140, ISL43141, ISL43142
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
100
90
80
70
60
50
40
-40°C
120
100
85°C
V- = -5V
25°C
V_COM = (V+) - 1V
I_COM = 1mA
V- = -3V
80
60
40
300
250
200
150
100
50
0
2
-40°C
85°C
-40°C
34
85°C
25°C
V- = 0V
56789
V+ (V)
25°C
10 11 12 13
FIGURE 9. ON RESISTANCE vs POSITIVE SUPPLY VOLTAGE
250
200
85°C
V+ = 3V
I_COM = 1mA
150
25°C
V- = 0V
100
-40°C
50
135
85°C
V+ = 5V
115
95
25°C
V- = 0V
75
-40°C
55
80
70
85°C
60
25°C
V+ = 12V
V- = 0V
50
40
30 -40°C
20
0 1 2 3 4 5 6 7 8 9 10 11 12
V_COM (V)
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
180
I_COM = 1mA
140
85°C
100
60
120
100
80
85°C
V_S = ±2V
25°C
-40°C
V_S = ±3V
25°C
60
-40°C
40
90
85°C
70
25°C
50
V_S = ±5V
-40°C
30
-5 -4 -3 -2 -1 0 1 2 3 4 5
V_COM (V)
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
5
2.5
0
-2.5 _{VS = ±5V}
-5
-7.5
V+ = 3V
V+ = 5V
V+ = 12V
-10
-5
-2.5
0
2.5
5
7.5
10 12.5
V_COM (V)
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
11