参数资料
型号: CA3240EZ
厂商: Intersil
文件页数: 3/15页
文件大小: 0K
描述: IC OPAMP DUAL BIMOS 4.5MHZ 8DIP
标准包装: 50
放大器类型: 通用
电路数: 2
转换速率: 9 V/µs
增益带宽积: 4.5MHz
电流 - 输入偏压: 10pA
电压 - 输入偏移: 5000µV
电流 - 电源: 8mA
电流 - 输出 / 通道: 40mA
电压 - 电源,单路/双路(±): 4 V ~ 36 V,±2 V ~ 18 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-PDIP
包装: 管件
产品目录页面: 1233 (CN2011-ZH PDF)
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
1/2
CA3240E
+
-
1/2
CA3240E
+
0.015
μF
100K
0.015
μF
100K
+15V
5.1K
1.3
13K
K
C30809
PHOTO
DIODE
C30809
PHOTO
DIODE
-
2K
200K
2K
OUTPUT
-
200k
CA3240, CA3240A
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