DG444B Datasheet, PDF (5/7 Pages) Vishay Siliconix – Improved Quad SPST CMOS Analog Switches

New Product
DG444B/445B
Vishay Siliconix
SCHEMATIC DIAGRAM (TYPICAL CHANNEL)
V+
V_L
V_IN
GND
V−
Level
Shift/
Drive
S
V−
V+
D
FIGURE 1.
TEST CIRCUITS
"10 V
3V
+5 V
V_L
S
IN
GND
+15 V
V+
D
R_L
1 kW
V−
V_O
C_L
35 pF
−15 V
C_L (includes fixture and stray capacitance)
Logic
Input
Switch
Input
3V
50% 50%
0V
t_r <20 ns
t_f <20 ns
t_OFF
V_S
V_O
80%
80%
Switch
0V
Output
t_ON
Note:
Logic input waveform is inverted for DG445.
FIGURE 2. Switching Time
+5 V
+15 V
V_L
R_g
S
V+
D
V_g
3V
IN
GND
V−
V_O
C_L
1 nF
DV_O
V_O
IN_X
OFF
ON
OFF
(DG444B)
−15 V
OFF
IN_X
(DG445B)
FIGURE 3. Charge Injection
ON
Q = DV_O x C_L
OFF
Document Number: 72626
S-32554—Rev. A, 15-Dec-03
www.vishay.com
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