ca3240a Intersil Corporation, ca3240a Datasheet - Page 5

• Manufacturer Part Number: ca3240a
• Description: Dual, 4.5mhz, Bimos Operational Amplifier With Mosfet Input/bipolar Output
• Manufacturer: Intersil Corporation

Test Circuits and Waveforms
Schematic Diagram
NOTES:
9. All resistance values are in ohms.
NON-INVERTING
INVERTING
R
8K
Q
Q
1
BIAS CIRCUIT
1
7
INPUT
INPUT +
FIGURE 2. TEST CIRCUIT AMPLIFIER (30dB GAIN) USED FOR WIDEBAND NOISE MEASUREMENT
D
-
1
Q
Q
6
8
D
2
(One Amplifier of Two)
5
500Ω
500Ω
D
R
R
Q
INPUT STAGE
3
2
4
11
Q
Q
Q
BW (-3dB) = 140kHz
TOTAL NOISE VOLTAGE
(REFERRED TO INPUT) = 48µV (TYP)
5
2
9
Q
10
(Continued)
D
Q
D
1MΩ
4
R
500Ω
R
500Ω
12
5
R
3
5
S
CA3240, CA3240A
SECOND STAGE
+15V
-15V
12pF
CA3240
+
C
-
1
Q
Q
Q
3
4
13
0.01µF
0.01µF
OUTPUT STAGE
Q
Q
17
14
R
50Ω
R
1K
Q
30.1kΩ
1kΩ
6
8
19
R
Q
50Ω
1K
20Ω
D
R
10
NOISE
VOLTAGE
OUTPUT
R
18
7
11
Q
9
15
DYNAMIC CURRENT SINK
Q
16
12K
R
Q
Q
12
21
20
R
30Ω
D
7
R
15K
R
20K
D
6
13
14
8
V-
V+
OUTPUT
March 4, 2005
FN1050.6