DG417AK/883 TEMIC [TEMIC Semiconductors], DG417AK/883 Datasheet - Page 9

• Manufacturer Part Number: DG417AK/883
• Description: Precision CMOS Analog Switches
• Manufacturer: TEMIC [TEMIC Semiconductors]

V, 2.4 V
V, 2.4 V
Test Circuits (Cont’d)
Applications
Switched Signal Powers Analog Switch
The analog switch in Figure 10 derives power from its input
signal, provided the input signal amplitude exceeds 4 V and
its frequency exceeds 1 kHz.
This circuit is useful when signals have to be routed to either
of two remote loads. Only three conductors are required:
one for the signal to be switched, one for the control signal
and a common return.
Siliconix
S-52880—Rev. D, 28-Apr-97
C
C
IN
IN
DG417/418
+5 V
+5 V
GND
GND
V
V
L
L
+15 V
+15 V
–15 V
–15 V
V–
V–
V+
V+
D
D
S
S
Control
C
C
C
C
Input
Figure 10. Switched Signal Powers Remote
D
1
Figure 9. Source/Drain Capacitances
or Equivalent
Impedance
HP4192A
f = 1 MHz
f = 1 MHz
Analyzer
D
IN
Meter
GND
SPDT Analog Switch
V+
DG419
V
V–
0 V, 2.4 V
0 V, 2.4 V
L
A positive input pulse turns on the clamping diode D
charges C
chip; operation is satisfactory because the switch requires
less than 1 A of stand-by supply current. Loading of the
signal source is imperceptible. The DG419’s on-resistance
is a low 100
S
S
1
2
C
C
+15 V
+15 V
IN
IN
DG419
R
10 k
V+
V+
GND
GND
C
0.01 F
1
L1
1
. The charge stored on C
D
D
S
S
2
2
2
2
NC
NC
DG417/418/419
for a 5-V input signal.
R
10 k
–15 V
–15 V
L2
V–
V–
V
D
D
OUT
S
S
1
1
1
1
C
C
1
is used to power the
or Equivalent
or Equivalent
Impedance
Impedance
HP4192A
HP4192A
f = 1 MHz
f = 1 MHz
Analyzer
Analyzer
Meter
Meter
9
1
and