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參數(shù)資料
| 型號(hào)： | OP227 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Dual, Low Noise, Low Offset Instrumentation Operational Amplifier |
| 中文描述： | 雙通道，低噪聲，低失調(diào)儀表運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 13/16頁(yè) |
| 文件大小： | 481K |
| 代理商： | OP227 |
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REV. A
OP227
– 1 3 –
A1
A2
C
1
30pF
D
1
1N914
R
1
*
1k
2N4393
R
3
2k
D
2
V
1
V
O
*
MATCHED
A1, A2: OP27
R
2
*
1k
Figure 5. High Speed Precision Rectifier
High Speed Precision Rectifier
The low offsets and excellent load driving capability of the OP27
are key advantages in this precision rectifier circuit. The summing
impedances can be as low as 1 k
W
which helps to reduce the
effects of stray capacitance.
For positive inputs, D2 conducts and D1 is biased OFF. Ampli-
fiers A1 and A2 act as a follower with output-to-output feedback
and the R1 resistors are not critical. For negative inputs, D1
conducts and D2 is biased OFF. A1 acts as a follower and A2
serves as a precision inverter. In this mode, matching of the two
R1 resistors is critical to gain accuracy.
Typical component values are 30 pF for C1 and 2 k
W
for R3.
The drop across D1 must be less than the drop across the FET
diode D2. A 1N914 for D1 and a 2N4393 for the JFET were
used successfully.
The circuit provides full-wave rectification for inputs of up to
±
10 V and up to 20 kHz in frequency. To assure frequency stability,
be sure to decouple the power supply inputs and minimize any
capactive loading. An OP227, which is two OP27 amplifiers in a
single package, can be used to improve packaging density.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OP227E | Analog IC |
| OP227F | Analog IC |
| OP227G | Analog IC |
| OP227AYMDA | Dual, Low Noise, Low Offset Instrumentation Operational Amplifier |
| OP227EY | Dual, Low Noise, Low Offset Instrumentation Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OP-227 | 制造商:AD 制造商全稱:Analog Devices 功能描述:DUAL, LOW-NOISE LOW OFFSET INSTRUMENTATION OPERATIONAL AMPLIFIER |
| OP-227A883 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROCIRCUIT, LINEAR, LOW NOISE OPERATIONAL AMPLIFIER, MONOLITHIC SILICON |
| OP-227AJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
| OP227AJ/883C | 制造商:Linear Technology 功能描述:IC,OP-AMP,DUAL,BIPOLAR,DIP,14PIN,CERAMIC |
| OP227AJ883B | 制造商:Linear Technology 功能描述:AMPLIFIER-OP AMP |
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