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CA3240EZ

P1-P3P4-P6P7-P9P10-P12P13-P15
10
FN1050.6
March 4, 2005
FIGURE 9. PRECISION DIFFERENTIAL AMPLIFIER
FIGURE 10. TYPICAL ELECTROCARIOGRAM WAVEFORM
1/2
CA3240
+
-
1/2
CA3240
+
-
1
2
3
6
5
7
3
2
6
4
CA3140
7
8
4
100K 1%
2000pF
+15V
0.1μF
OUTPUT
2K
5.1K
1%
1%
5.1K
-15V
100K 1%
100K 1%
2000pF
2000pF
0.1μF
+15V
0.1μF
0.1μF
-15V
100K
3.9K
10M
10M
GAIN
CONTROL
TWO COND.
SHIELDED
CABLE
FREQUENCY RESPONSE (-3dB) DC TO 1MHz
SLEW RATE = 1.5V/μs
COMMON MODE REJ: 86dB
GAIN RANGE: 35dB TO 60dB
Vertical: 1.0mV/Div.
Amplifier Gain = 100X
Scope Sensitivity = 0.1V/Div.
Horizontal: >0.2s/Div. (Uncal)
CA3240, CA3240A
11
FN1050.6
March 4, 2005
Differential Light Detector
In the circuit shown in Figure 11, the CA3240E converts the
current from two photo diodes to voltage, and applies 1V of
reverse bias to the diodes. The voltages from the CA3240E
outputs are subtracted in the second stage (CA3140) so that
only the difference is amplified. In this manner, the circuit
can be used over a wide range of ambient light conditions
without circuit component adjustment. Also, when used with
a light source, the circuit will not be sensitive to changes in
light level as the source ages.
FIGURE 11. DIFFERENTIAL LIGHT DETECTOR
3
2
+15V
6
2
3
7
+15V
CA3140
+
6
5
4
8
4
1
7
-15V
-15V
1/2
CA3240E
+
-
1/2
CA3240E
+
0.015μF
100K
0.015μF
100K
+15V
5.1K
1.3
13K
K
C30809
PHOTO
DIODE
C30809
PHOTO
DIODE
-
2K
200K
2K
OUTPUT
-
200k
CA3240, CA3240A
12
FN1050.6
March 4, 2005
Typical Performance Curves
FIGURE 12. OPEN LOOP VOLTAGE GAIN vs SUPPLY VOLTAGE FIGURE 13. GAIN BANDWIDTH PRODUCT vs SUPPLY VOLT-
AGE
FIGURE 14. SLEW RATE vs SUPPLY VOLTAGE
FIGURE 15. QUIESCENT SUPPLY CURRENT vs SUPPLY VOLT-
AGE
FIGURE 16. MAXIMUM OUTPUT VOLTAGE SWING vs
FREQUENCY
FIGURE 17. COMMON MODE REJECTION RATIO vs
FREQUENCY
R
L
= 2kΩ
T
A
= -40
o
C
25
o
C
85
o
C
125
100
75
50
25
2520151050
OPEN LOOP VOLTAGE GAIN (dB)
SUPPLY VOLTAGE (V)
R
L
= 2kΩ
C
L
= 100pF
T
A
= -40
o
C
0 5 10 15 20 25
SUPPLY VOLTAGE (V)
1
10
20
GAIN BANDWIDTH PRODUCT (MHz)
25
o
C
85
o
C
25
o
C
T
A
= -40
o
C
R
L
= 2kΩ
5101520
SUPPLY VOLTAGE (V)
25
C
L
= 100pF
20
15
10
5
0
SLEW RATE (V/μs)
0
85
o
C
R
L
= ∞
T
A
= -40
o
C
25
o
C
85
o
C
10
9
8
7
6
5
4
3
2
0 5 10 15 20
SUPPLY VOLTAGE (V)
TOTAL SUPPLY CURRENT (mA)
FOR BOTH AMPS
25
25
20
15
10
5
0
OUTPUT VOLTAGE (V
P-P
)
10K 100K
FREQUENCY (Hz)
1M 4M
SUPPLY VOLTAGE: V
S
= ±15V
T
A
= 25
o
C
120
100
80
60
40
20
0
SUPPLY VOLTAGE: V
S
= ±15V
T
A
= 25
o
C
10
1
10
2
10
3
10
4
10
5
10
6
10
7
COMMON MODE REJECTION RATIO (dB)
FREQUENCY (Hz)
CA3240, CA3240A
P1-P3P4-P6P7-P9P10-P12P13-P15

CA3240EZ

Mfr. #:
Buy CA3240EZ
Manufacturer:
Renesas / Intersil
Description:
Operational Amplifiers - Op Amps OPAMP 2X 4.5MHZ LWBI AS 0.05NA 8PDIP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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