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Revision 1.03

10 - 15

AS1746

Datasheet - A p p l i c a t i o n I n f o r m a t i o n

Test Circuits and Timing Diagrams

Figure 17. Switching Time

Figure 18. Break-Before-Make Interval

Figure 19. Charge Injection

AS1746

COMx

50

Ω

INx

V+

Switch

Output

Logic

Input

0

50%

50%

NOx or NCx

†

35pF

†

Includes stray capacitance and fixture capacitance.

Logic input waveforms inverted for switches

that have the opposite logic sense.

GND

Logic

Input

()

AS1746

COMx

INx

V+

NCx

NOx

†

Includes stray capacitance and fixture capacitance.

Logic

Input

0

50%

GND

Logic

Input

50

Ω

†

35pF

NOx or NCx

INx

INx depends on switch configuration; input polarity is determined

by the sense of the switches.

V+

INx

INx

Off

Off

Off

Off

On

On

GND

AS1746

COMx

Q =