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參數(shù)資料
| 型號： | MC33178 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Low Power, Low Noise Operational Amplifiers(低功耗，低噪聲運放) |
| 中文描述： | 低功耗，低噪聲運算放大器（低功耗，低噪聲運放） |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 223K |
| 代理商： | MC33178 |
MC33178, MC33179
http://onsemi.com
12
If a high source of resistance is used (R1 > 1.0 k ), a
compensation capacitor equal to or greater than the input
capacitance of the op amp (10 pF) placed across the
feedback resistor (see Figure 35) can be used to neutralize
that pole and prevent outer loop oscillation. Since the closed
loop transient response will be a function of that
capacitance, it is important to choose the optimum value for
that capacitor. This can be determined by the following
Equation:
(1)
CC
(1
[R1 R2])2
CL(ZOR2)
where: Z
O
is the output impedance of the op amp.
For moderately high capacitive loads (500 pF < C
L
< 1500 pF) the addition of a compensation resistor on the
order of 20 between the output and the feedback loop will
help to decrease miller loop oscillation (see Figure 36). For
high capacitive loads (C
L
> 1500 pF), a combined
compensation scheme should be used (see Figure 37). Both
the compensation resistor and the compensation capacitor
affect the transient response and can be calculated for
optimum performance. The value of C
C
can be calculated
using Equation 1. The Equation to calculate R
C
is as follows:
RC
ZO
(2)
R1 R2
Figure 35. Compensation for
High Source Impedance
Figure 36. Compensation Circuit for
Moderate Capacitive Loads
Figure 37. Compensation Circuit for
High Capacitive Loads
R2
+
R1
Z
L
C
C
R2
R
C
C
L
R1
+
R2
C
C
R
C
C
L
R1
+
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相關(guān)代理商/技術(shù)參數(shù) |
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| MC33178 | 制造商:SPC Multicomp 功能描述:PTC Resettable Fuse |
| MC33178_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Low Power, Low Noise Operational Amplifiers |
| MC33178D | 功能描述:運算放大器 - 運放 2-18V Dual Low Power 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 |
| MC33178DG | 功能描述:運算放大器 - 運放 2-18V Dual Low Power 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 |
| MC33178DG | 制造商:ON Semiconductor 功能描述:Operational Amplifier (Op-Amp) IC |
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