DG540 TEMICs, DG540 Datasheet - Page 7

• Manufacturer Part Number: DG540
• Description: Wideband/Video T Switches
• Manufacturer: TEMICs

Test Circuits
V
Siliconix
S-53694—Rev. E, 28-May-97
g
V
S
Off Isolation = 20 log
C = RF Bypass
R
g
0 V, 2.4 V
= 75
C
V
3 V
L
R
O
(includes fixture and stray capacitance)
S
IN
g
GND
= V
S
V+
C
Figure 4. Off Isolation
S
IN
IN
GND
S
+15 V
R
L
GND
–3 V
V
V
V–
R
+ r
S
O
L
D
DS(on)
V+
V+
+15 V
+15 V
–3 V
V–
–3 V
V–
D
R
1 k
L
D
C
Figure 3. Charge Injection
Figure 2. Switching Time
C
35 pF
L
C
1000 pF
L
V
O
V
R
75
V
O
L
O
Switch
Switch
Output
Logic
Input
Input
3 V
The charge injection in coulombs is Q = C
V
V
S
0
V
O
S
V
IN
= measured voltage error due to charge injection
O
X
0 V, 2.4 V
R
g
ON
= 50
DG540/541/542
50%
C
V
S
IN
O
Figure 5. Bandwidth
GND
t
OFF
ON
90%
V+
+15 V
–3 V
V–
L
x DV
ON
D
O
C
t
t
r
f
t
<20 ns
<20 ns
OFF
R
V
50
L
O
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