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DG2747 Datasheet, PDF (6/8 Pages) Vishay Siliconix – 0.4-Ω, Low Voltage, Dual SPST Analog Switch
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DG2747/DG2748/DG2749
Vishay Siliconix
TEST CIRCUITS
Switch
Input
Logic
Input
V+
V+
NO or NC
COM
IN
GND
0V
Switch Output
VOUT
RL
50 Ω
CL
35 pF
Logic
Input
Switch
Output
CL (includes fixture and stray capacitance)
( ) VOUT
= VCOM
RL
RL + RON
Figure 1. Switching Time
VINH
VINL
50 %
tr < 5 ns
tf < 5 ns
0.9 x VOUT
0V
tON
tOFF
Logic "1" = Switch On
Logic input waveforms inverted for switches that have
the opposite logic sense.
VNO2
VNC1
NO2
IN2
NC 1
IN1
GND
V+
V+
COM2
VO2
COM1
VO1
RL1
50 Ω
CL1
35 pF
RL2
50 Ω
CL2
35 pF
Logic
Input
VINH
VINL
VNO2
VO2
Switch
Output
0V
VNC1
VO1
Switch
0V
Output
50 %
90 %
90 %
tD
tD
CL (includes fixture and stray capacitance)
Figure 2. Break-Before-Make (DG2749)
V+
V+
Rg
NC or NO
COM
Vg
VIN = 0 - V+ IN
GND
VO
CL
1 nF
VO
INX
OFF
OFF
INX
ΔVO
ON
OFF
ON
Q = ΔVO x CL
OFF
Figure 3. Charge Injection
www.vishay.com
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Document Number: 69977
S-80899-Rev. A, 21-Apr-08
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