ISL43410_06 Datasheet, PDF (9/13 Pages) Intersil Corporation – Low-Voltage, Single Supply, DPDT High Performance Analog Switch

ISL43410
per decade as frequency increases. Higher load
impedances decrease Off Isolation and Crosstalk rejection
due to the voltage divider action of the switch OFF
impedance and the load impedance.
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
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.
Typical Performance Curves T_A = 25°C, Unless Otherwise Specified
500
225
V_COM = (V+) - 1V
200
V+ = 3.3V
I_COM = 1mA
85°C
175
I_COM = 1mA
400
150
25°C
300
200
85°C
100
-40°C
25°C
0
2 3 4 5 6 7 8 9 10 11 12 13
V+ (V)
125
100
75
140
120
100
80
60
80
70 85°C
60
50
40 -40°C
30
0
-40°C
25°C
2
4
85°C
25°C
-40°C
6
V_COM (V)
V+ = 5V
V+ = 12V
8
10
12
FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
3.0
V_INH
2.5
-40°C
2.0
25°C
1.5
85°C
1.0
0.5
3.0
V_INL
2.5
-40°C
2.0
25°C
1.5
1.0
85°C
0.5
2 3 4 5 6 7 8 9 10 11 12 13
V+ (V)
FIGURE 11. DIGITAL SWITCHING POINT vs SUPPLY VOLTAGE
9
140
V+ = +5V
120
100
80
60
40
20
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
V_IN(ADD) (V)
FIGURE 12. SUPPLY CURRENT vs DIGITAL ADDRESS INPUT
VOLTAGE
FN6044.3
January 16, 2006