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6

PS8188C

10/24/02

PS323/PS324/PS325

Precision, Single Supply SPST Analog Switches

TestCircuits/TimingDiagrams

Figure 2. Switching Time

Figure 3. Break-Before-Make Interval (PS325 only)

Figure 4. Charge Injection

V+

+5V

NO

GND

or NC

COM

V

COM = 3V

Logic

Input

IN

tr <20ns

tf <20ns

()

1k

ohm

35pF

LOGIC INPUT WAVEFORMS INVERTED FOR

SWITCHES THAT HAVE OPPOSITE LOGIC

t

OFF

t

ON

V

OUT

90%

Logic

Input

Switch

Output

+3V

0V

0V

50%

90%

V+

V+

V

GND

NC

+3V

IN

Logic

Input

+3V

0V

50%

90%

90%

NO

Logic

Input

35

0V

t

Switch

Output

OUT

300

Ω

INCLUDES FIXTURE AND STRAY CAPACITANCE.

D

pF

V+

+5V

NO or

GND

NC

COM

R

GEN

1nF

V

OUT

∆V

OUT

IN

V

GEN

ON

ON

OFF

OFF

OFF

OFF

IN

Q = (

∆V

IN

Logic

Input

IN POLARITY DEPENDS ON NO OR NC SWITCH FUNCTION

ohm