CWB308 / CWB309
CORPORATION
FUNCTIONAL BLOCK DIAGRAMS
(1 of 4 channels)
V+
Switch Contacts:
Switches are bi-directional (Analog Input can be to
Source or Drain. However, for optimum performance in
Video Application, connect Input to Source and Output
to Drain.
S
D
IN
IL
LT
GND
CMOS CIRCUITRY
V-
DMOS SWITCH
SWITCHING TIMES TEST CIRCUIT
+15V
SWICHING TIMES
-VS-
SUPPLY VOLTAGES
300
T
A
= +25
o
C
t
on
200
SWITCH
INPUT
+3V
LOGIC
INPUT
R
L
=
1K
Ω
SWITCH
OUTPUT
C
L
= 35pF
Switching Time (nSec)
t
off
100
-15V
0
+5
_
+10
_
+15
_
Supply Voltages (Volts)
OFF ISOLATION TEST CIRCUIT
V+
C
KROHNHITE
240D
(or equivalent)
D
OIRR - OFF Isolation Rejection Ratio (db)
OFF ISOLATION REJECTION RATIO
-VS-
FREQUENCY
60
55
50
45
40
35
V-, V+ = _
+15V
R
L
= 50
Ω
50
Ω
LOGIC 1 = +5V
PHILIPS
SCOPE
A
B
S
PM3214
(or equivalent)
50
Ω
C
OFF-ISOLATION
C = 0.22
µ
F // 10
µ
F
V-
T
A
= +25
o
C
20
30
40
50
60
70
80
90 100
f - Frequency (MHz
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