參數(shù)資料
型號(hào)： op297
廠商： Analog Devices, Inc.
英文描述： Dual Low Bias Current Precision Operational Amplifier(低偏置電流精密雙運(yùn)放)
中文描述： 雙低偏置電流高精度運(yùn)算放大器（低偏置電流精密雙運(yùn)放）
文件頁數(shù)： 9/16頁
文件大小： 193K
代理商： OP297
8/21/97 4:00 PM
OP297
–9–
REV. D
PRECISION POSITIVE PEAK DETECTOR
In Figure 32, the C
H
must be of polystyrene, Teflon
*, or poly-
ethylene to minimize dielectric absorption and leakage. The
droop rate is determined by the size of C
H
and the bias current
of the OP297.
+
–
1/2
OP-297
V
IN
+
–
–
+
R
1
10k
R
2
10k
R
4
10k
R
3
10k
2
3
1
R
5
100
I
OUT
±
+15V
5
6
4
8
7
–15V
1/2
OP-297
I
OUT
=V
IN
R
5
=
V
IN
100
= 10mA/V
Figure 31. Precision Current Pump
SIMPLE BRIDGE CONDITIONING AMPLIFIER
Figure 33 shows a simple bridge conditioning amplifier using
the OP297. The transfer function is:
V
OUT
=
V
REF
R
R
+
R
R
F
R
The REF43 provides an accurate and stable reference voltage
for the bridge. To maintain the highest circuit accuracy, R
F
should be 0.1% or better with a low temperature coefficient.
0.1
μ
F
0.1
μ
F
–
1/2
+
3
2
1
–
1/2
+
5
6
8
7
4
+15V
–15V
OUT
V
1k
IN
V
1N4148
2N930
1k
1k
RESET
H
C
1k
Figure 32. Precision Positive Peak Detector
*Teflon is a registered trademark of the Dupont Company
Figure 33. A Simple Bridge Conditioning Amplifier Using the OP297
REF-43
R
R +
R
R
R
+5V
8
7
4
5
6
–5V
1/2
OP-297
+
1/2
OP-297
+
2
1
3
V
OUT
R
F
+5V
2
6
V
REF
2.5V
4
–
–
V
OUT
V
REF
=
R
R +
R
R
F
R
(
(
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
OP-297 制造商:AD 制造商全稱:Analog Devices 功能描述:DUAL LOW BIAS CURRENT PRECISION OPERATIONAL AMPLIFIER
OP297_03 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Low Bias Current Precision Operational Amplifier
OP297_06 制造商:AD 制造商全稱:Analog Devices 功能描述:Dual Low Bias Current Precision Operational Amplifier
OP2970012Z 制造商:Rochester Electronics LLC 功能描述:- Bulk
OP297A 功能描述:紅外發(fā)射源 Infrared 890nm RoHS:否 制造商:Fairchild Semiconductor 波長(zhǎng):880 nm 射束角:+/- 25 輻射強(qiáng)度: 最大工作溫度:+ 100 C 最小工作溫度:- 40 C 封裝 / 箱體:Side Looker 封裝:Bulk
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