
11
PS8168E
09/16/02
PS391/PS392/PS393
Precision, Quad, SPST Analog Switches
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TestCircuits/TimingDiagrams(continued)
Figure 4. Off Isolation
Figure 6. Channel-Off Capacitance
Figure 5. Crosstalk
Figure 7. Channel-On Capacitance
V+
+5V
NC
Capacitance
Meter
GND
-5V
V-
or NO
COM
10nF
IN
0V or
2.4V
10nF
f = 1kHz
V+
+5V
NC
Analyzer
GND
-5V
V-
or NO
COM
10nF
IN
RL
0V or
2.4V
10nF
COM
Signal
Generator 0dBm
V+
+5V
Analyzer
GND
-5V
V-
N02
COM1
10nF
IN2
RL
10nF
COM
Signal
Generator 0dBm
0V or
2.4V
COM2
IN1
N01
NC
50
0V or
2.4V
V+
+5V
NC
Capacitance
Meter
GND
EN
or NO
COM
10nF
IN
0V or
2.4V
f = 1kHz
As illustrated in Figure 8, PS391 can be used to insert various
capacitors (C1, C2) and set proper RC times for integration. The
resistors R1 and R2 set initial gain. The RIN resistor x C1 or C2 sets
the RC time. The reset switch discharges the hold capacitor
through RIN.
Figure8. ProgrammableIntegratorandSample/Hold
Applications