DG449 Datasheet, PDF (7/9 Pages) Vishay Siliconix – High Voltage Single SPDT Analog Switch in SOT23-8

DG449
Vishay Siliconix
TYPICAL CHARACTERISTICS T_A = 25 °C, unless otherwise noted
3.0
50
40
2.5
30
2.0
20
10
1.5
V+ = + 12 V
0
- 10
1.0
- 20
- 30
V ± = ± 15 V
0.5
- 40
0
0
5
10
15
20
25
30
Supply Voltage (V)
Switching Threshold vs. Supply Voltage
- 50
- 15 - 12 - 9 - 6 - 3 0 3 6 9 12 15
V_NO, V_NC - Analog Voltage (V)
Charge Injection vs. Analog Voltage
TEST CIRCUITS
V_O is the steady state output with the switch on.
+ 15 V
V+
Vi
NO or NC
COM
V_O
IN
R_L
C_L
GND
V-
300 Ω
35 pF
Logic
3V
Input
0V
50 %
Switch
V_S
Input
V_O
90 %
t_r < 20 ns
t_f < 20 ns
t_OFF
-15 V
Switch
0V
Output
t_ON
C_L (includes fixture and stray capacitance)
V_O = V_i
R_L
R_L + r_ON
Note: Logic input waveform is inverted for switches that have the
opposite logic sense.
Figure 1. Switching Time
V_gen
R_gen
3V
+ 15 V
NO or NC
IN
GND
V+
COM
V-
- 15 V
Document Number: 73897
S-60861–Rev. A, 22-May-06
V_O
C_L
1 nF
V_O
IN
OFF
Figure 2. Charge Injection
ΔV_O
ON
Q = ΔV_O x C_L
OFF
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