參數(shù)資料
型號(hào)： LMV712LDX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 運(yùn)算放大器
英文描述： Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent Shutdown
中文描述： DUAL OP-AMP, 3200 uV OFFSET-MAX, 5 MHz BAND WIDTH, DSO10
封裝： LLP-10
文件頁(yè)數(shù)： 11/14頁(yè)
文件大?。?/td> 505K
代理商： LMV712LDX
Application Information
(Continued)
In Figure 3 the isolation resistor R
and the load capacitor
C
form a pole to increase stability by adding more phase
margin to the overall system. The desired performance de-
pends on the value of R
ISO
. The bigger the R
resistor
value, the more stable V
OUT
will be. But the DC accuracy is
degraded when the R
resistor in Figure 3 the output voltage would be divided by
R
ISO
and the load resistor.
The circuit in Figure 4is an improvement to the one in Figure
3 because it provides DC accuracy as well as AC stability. In
this circuit, R
F
provides the DC accuracy by using
feed-forward techniques to connect V
IN
to R
L
. C
F
and R
ISO
serve to counteract the loss of phase margin by feeding the
high frequency component of the output signal back to the
amplifier’s inverting input, thereby preserving phase margin
in the overall feedback loop. Increased capacitive drive is
possible by increasing the value of C
F
. This in turn will slow
down the pulse response.
Latchup
CMOS devices tend to be susceptible to latchup due to their
internal parasitic SCR (silicon controlled rectifier) effects.
The input and output pins look similar to the gate of the SCR.
There is a minimum current required to trigger the SCR gate
lead. The LMV712 is designed to withstand 150mA surge
current on all the pins. Some resistive method should be
used to isolate any capacitance from supplying excess cur-
rent to the pins. In addition, like an SCR, there is a minimum
holding current for any latchup mode. Limiting current to the
supply pins will also inhibit latchup susceptibility.
10137032
FIGURE 3.
10137033
FIGURE 4.
L
www.national.com
11
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMV712LDX/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)放 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
LMV712MM 功能描述:運(yùn)算放大器 - 運(yùn)放 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
LMV712MM/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)放 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
LMV712MMX 功能描述:運(yùn)算放大器 - 運(yùn)放 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
LMV712MMX/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)放 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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