參數(shù)資料
型號(hào)： MC33178PG
廠商： ON SEMICONDUCTOR
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Low Power, Low Noise Operational Amplifiers
中文描述： DUAL OP-AMP, 4000 uV OFFSET-MAX, 3 MHz BAND WIDTH, PDIP8
封裝： LEAD FREE, PLASTIC DIP-8
文件頁(yè)數(shù)： 12/19頁(yè)
文件大?。?/td> 284K
代理商： MC33178PG
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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MC33179 制造商:SPC Multicomp 功能描述:FUSE RESETTABLE RADIAL 1.1A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, RADIAL, 90V, 1.1A 制造商:SPC Multicomp 功能描述:RESETTABLE FUSE RADIAL 1.1A 制造商:SPC Multicomp 功能描述:FUSE, PTC RESET, 90V, 1.1A, RADIAL; Holding Current:1.1A; Tripping Current:2.2A; Initial Resistance Max:0.38ohm; Operating Voltage:90V; Series:FRX; PTC Fuse Case:Radial Leaded; External Depth:3.1mm; Initial Resistance Min:0.15ohm ;RoHS Compliant: Yes
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MC33179DG 功能描述:運(yùn)算放大器 - 運(yùn)放 2-18V Quad 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(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
MC33179DR2 功能描述:運(yùn)算放大器 - 運(yùn)放 2-18V Quad 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(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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