CA3280, CA3280A
Test Circuits and Waveforms
30V
I
0V
TEST
POINT
+30V
14
15
-
1/2
CA3280
13
+
16
4
1
3
INPUT
1kΩ
V+
16
15
0.1
µF
0.1µF
14
+
1/2
CA3280
13
-
3
4
30kΩ
V-
V+
30kΩ
1kΩ
OUTPUT
10kΩ
FIGURE 1. LEAKAGE CURRENT TEST CIRCUIT
FIGURE 2. CHANNEL SEPARATION TEST CIRCUIT
V+
15V
14
10kΩ
16
10kΩ
1/2
CA3280
13
15
4
3
1kΩ
1
V-
-15V
IABC
IDIODE
IOUT
VIN
IABC = 650µA, ID = 200µA; Vertical = 200µA/Div.;
Horizontal = 1V/Div.
FIGURE 3A. EFFECTS OF DIODE LINEARIZATION, WITH DIODE PROGRAMMING TERMINAL ACTIVE
10kΩ
10kΩ
V+
15V
11
9
1/2
CA3280
12
10
8
IDIODE
6
4
IABC
1kΩ
V-
-15V
IOUT
VIN
IABC = 650µA; ID = 0; Vertical = 200µA/Div.;
Horizontal = 25mV/Div.
FIGURE 3B. WITH DIODE PROGRAMMING TERMINAL CUTOFF
FIGURE 3. CA3280 TRANSFER CHARACTERISTICS
4