參數(shù)資料
型號(hào)： SA5230FE
廠商： NXP SEMICONDUCTORS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Low Voltage Operational Amplifier
中文描述： OP-AMP, 3000 uV OFFSET-MAX, 0.25 MHz BAND WIDTH, CDIP8
封裝： 0.300 INCH, CERAMIC, DIP-8
文件頁(yè)數(shù)： 11/17頁(yè)
文件大?。?/td> 189K
代理商： SA5230FE
Philips Semiconductors
Product specification
NE/SA5230
Low voltage operational amplifier
1994 Aug 31
11
HALF-WAVE RECTIFIER WITH RAIL-TO-GROUND
OUTPUT SWING
Since the NE5230 input common-mode range includes both positive
and negative supply rails and the output can also swing to either
supply, achieving half-wave rectifier functions in either direction
becomes a simple task. All that is needed are two external resistors;
there is no need for diodes or matched resistors. Moreover, it can
have either positive- or negative-going outputs, depending on the
way the bias is arranged. This can be seen in Figure 8. Circuit (a) is
biased to ground, while circuit (b) is biased to the positive supply.
This rather unusual biasing does not cause any problems with the
NE5230 because of the unique internal saturation detectors
incorporated into the part to keep the PNP and NPN output
transistors out of “hard” saturation. It is therefore relatively quick to
recover from a saturated output condition. Furthermore, the device
does not have parasitic current draw when the output is biased to
either rail. This makes it possible to bias the NE5230 into
“saturation” and obtain half-wave rectification with good recovery.
The simplicity of biasing and the rail-to-ground half-sine wave swing
are unique to this device. The circuit gain can be changed by the
standard op amp gain equations for an inverting configuration.
It can be seen in these configurations that the op amp cannot
respond to one-half of the incoming waveform. It cannot respond
because the waveform forces the amplifier to swing the output
beyond either ground or the positive supply rail, depending on the
biasing, and, also, the output cannot disengage during this half
cycle. During the other half cycle, however, the amplifier achieves a
half-wave that can have a peak equal to the total supply voltage.
The photographs in Figure 9 show the effect of the different biasing
schemes, as well as the wide bandwidth (it works over the full audio
range), that the NE5230 can achieve in this configuration.
By adding another NE5230 in an inverting summer configuration at
the output of the half-wave rectifier, a full-wave can be realized. The
values for the input and feedback resistors must be chosen so that
each peak will have equal amplitudes. A table for calculating values
is included in Figure 10. The summing network combines the input
signal at the half-wave and adds it to double the half-wave’s output,
resulting in the full-wave. The output waveform can be referenced to
the supply or ground, depending on the half-wave configuration.
Again, no diodes are needed to achieve the rectification.
This circuit could be used in conjunction with the remote transducer
to convert a received AC output signal into a DC level at the
full-wave output for meters or chart recorders that need DC levels.
V
CC
a. Rail-to-Ground Output Swing Referenced to Ground
b. Negative-Going Output Referenced to V
CC
V
IN
V
CC
10
2
3
4
5
6
7
–
+
O
t
10
V
CC
V
OUT
t
V
CC
10
3
2
4
5
6
7
10
V
IN
V
OUT
V
CC
–
+
SL00257
Figure 8. Half-Wave Rectifier With Positive-Going Output Swings
相關(guān)PDF資料
PDF描述
SA5230 Low voltage operational amplifier(低壓運(yùn)算放大器)
SA5230D Low Voltage Operational Amplifier
SA5230N Low Voltage Operational Amplifier
SA5232 Matched dual high-performance low-voltage operational amplifier
SA5232D Matched dual high-performance low-voltage operational amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SA5230N 功能描述:運(yùn)算放大器 - 運(yùn)放 1.8V Single Rail to RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
SA5230NG 功能描述:運(yùn)算放大器 - 運(yùn)放 1.8V Single Rail to Rail Industrial Temp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
SA5232 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Matched dual high-performance low-voltage operational amplifier
SA5232D 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Matched dual high-performance low-voltage operational amplifier
SA5232D,112 功能描述:運(yùn)算放大器 - 運(yùn)放 MATCHED DUAL LOW-VOLT OP AMP RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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