10

FN6042.3

February 24, 2012

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.

FIGURE 9. ON RESISTANCE vs SUPPLY VOLTAGE

FIGURE 10. ON RESISTANCE vs SWITCH VOLTAGE

FIGURE 11. TURN - ON TIME vs SUPPLY VOLTAGE

FIGURE 12. TURN - OFF TIME vs SUPPLY VOLTAGE

V+ (V)

345

6

7

89

10

11

12

13

0

100

200

50

150

250

-40°C

+85°C

+25°C

0

4

6

8

10

12

2

V+ = 3.3V

30

40

50

60

70

80

+85°C

-40°C

+25°C

V+ = 12V

60

80

100

120

140

+25°C

-40°C

+85°C

V+ = 5V

75

100

150

200

225

175

125

+25°C

-40°C

+85°C

V+ (V)

23456789

10

11

12

50

100

150

200

250

300

350

0

-40°C

+85°C

+25°C

V+ (V)

23456789

10

11

12

10

20

30

40

50

60

70

80

90

100

110

120

+85°C

-40°C

+25°C

ISL84524, ISL84525