Vishay Siliconix

DG447, DG448

www.vishay.com

6

Document Number: 73854

S11-1336-Rev. D, 04-Jul-11

This document is subject to change without notice.

TEST CIRCUITS

Charge Injection vs. Analog Voltage

(Measured at COM pin)

Input Switching Threshold vs. Supply Voltage

Analog Voltage (V)

- 60

- 40

- 20

0

20

40

60

80

100

120

140

160

- 15

- 10

- 5

0

5

10

15

V+ = + 15 V

V- = - 15 V

V+ = + 12 V

V- = - 12 V

V+ = + 12 V

V- = 0 V

0.5

0.7

1.1

1.3

V+ (V)

25

20

15

10

5

30

0.9

1.9

1.7

1.5

2.1

2.5

2.3

Charge Injection vs. Analog Voltage

(Measured at NC or NO pin)

Analog Voltage (V)

- 400

- 350

- 300

- 250

- 200

- 150

- 100

- 50

0

50

100

150

- 15

- 10

-5

0

5

10

15

V+ = + 12 V

V- = 0 V

V+ = + 12 V

V- = - 12 V

V+ = + 15 V

V- = - 15 V

Figure 1. Switching Time

V -

IN

NO/NC

COM

35 pF

- 15 V

GND

10 V

V +

300

Ω

+ 15 V

0 V

Logic

Input

Switch

Input

Switch

Output

3 V

50 %

0 V

90 %

Note:

Logic input waveform is inverted for switches that have the

opposite logic sense.