ISL43143_15 Datasheet, PDF (11/16 Pages) Intersil Corporation – Low-Voltage, Single and Dual Supply,Quad SPST, High Performance Analog Switches

ISL43143, ISL43144, ISL43145
Crosstalk rejection provided by this family. At 10MHz, OFF
isolation is about 50dB in 5systems, decreasing
approximately 20dB 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 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
25
20
85°C
V- = -5V
V_COM = (V+) - 1V
I_COM = 1mA
15
-40°C
10
35
30
25
20
15 _-40°C
10
200
150
125
100
75
85°C
25°C
50
25 _-40°C
0
2345
25°C
85°C
V- = -3V
V- = 0V
6789
V+ (V)
25°C
10 11 12 13
FIGURE 9. ON RESISTANCE vs POSITIVE SUPPLY VOLTAGE
70
60
V+ = 3V
I_COM = 1mA
50
85°C
V- = 0V
40
25°C
30
-40°C
20
35
85°C V+ = 5V
30
25
25°C ^{V- = 0V}
20
-40°C
15
20
18
16
85°C _25°C
V+ = 12V
V- = 0V
14
12
10 -40°C
8
0 1 2 3 4 5 6 7 8 9 10 11 12
V_COM (V)
FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE
45
40 ^ICOM ^{= 1mA}
35
30
25
20
35
30
25
20
15
85°C
V_S =2V
85°C
25°C
-40°C
V_S =3V
25°C
-40°C
10
25
20 _25°C
15
85°C
V_S =5V
10 -40°C
5
-5 -4 -3 -2 -1 0 1 2 3 4 5
V_COM (V)
FIGURE 11. ON RESISTANCE vs SWITCH VOLTAGE
15
10
5
V_S =5V
0
V+ = 5V
V+ = 3V
V+ = 12V
-5
-10
-5
-2.5
0
2.5
5
7.5
10
12.5
V_COM (V)
FIGURE 12. CHARGE INJECTION vs SWITCH VOLTAGE
11
FN6037.4
August 31, 2015