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參數(shù)資料
| 型號： | SA5230 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low Voltage Operational Amplifier(低壓運算放大器) |
| 中文描述： | 低電壓運算放大器（低壓運算放大器） |
| 文件頁數(shù)： | 12/18頁 |
| 文件大小： | 245K |
| 代理商： | SA5230 |
NE5230, SA5230, SE5230
http://onsemi.com
12
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. In Figure 9, the circuit is biased to
ground, while circuit (Figure 10) 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 11 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.
V
CC
Figure 9. Rail
to
Ground Output Swing Referenced to Ground
Figure 10. Negative
Going Output Referenced to V
CC
V
IN
V
CC
2
3
4
5
6
7
+
O
t
V
CC
V
OUT
t
V
CC
3
2
4
5
6
7
V
IN
V
OUT
V
CC
+
Half
Wave Rectifier With Positive
Going Output Swings
10
10
10
10
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA5230D | 功能描述:運算放大器 - 運放 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 |
| SA5230DG | 功能描述:運算放大器 - 運放 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 |
| SA5230DR2 | 功能描述:運算放大器 - 運放 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 |
| SA5230DR2G | 功能描述:運算放大器 - 運放 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 |
| SA5230FE | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low voltage operational amplifier |
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