DG641 Datasheet, PDF (7/10 Pages) Vishay Siliconix – Low On-Resistance Wideband/Video Switches

TEST CIRCUITS
+15 V
V+
3V
S
D
IN
3V
GND
V–
–3 V
R_L
1 kW
V_O
C_L
35 pF
3V
Logic
Input
Switch
Output ⁰
FIGURE 2. Switching Time
DG641/642/643
Vishay Siliconix
50%
90%
t_ON
t_r <20 ns
t_f <20 ns
90%
t_OFF
+15 V
V+
R_g
S
D
V_g
IN
3V
GND
V–
–3 V
V_O
C_L
1000 pF
V_O
DV_O
ON
IN_X
ON
OFF
DV_O = measured voltage error due to charge injection
The charge injection in coulombs is Q = C_L x DV_O
FIGURE 3. Charge Injection
V_S
R_g = 50 W
0V, 2.4 V
+15 V
C
V+
S
D
IN
GND
V–
C
V_O
R_L
–3 V
V_S
Off Isolation = 20 log
V_O
FIGURE 4. Off Isolation
Document Number: 70058
S-52433—Rev. E, 06-Sep-99
www.vishay.com S FaxBack 408-970-5600
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