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參數(shù)資料
| 型號： | LMV716MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 5 MHz, Low Noise, RRO, Dual Operational Amplifier with CMOS Input |
| 中文描述： | DUAL OP-AMP, 5000 uV OFFSET-MAX, 5 MHz BAND WIDTH, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 953K |
| 代理商： | LMV716MM |
Application Information
With the low supply current of only 1.6 mA, the LMV716
offers users the ability to maximize battery life. This makes
the LMV716 ideal for battery powered systems. The
LMV716’s rail-to-rail output swing provides the maximum
possible dynamic range at the output. This is particularly
important when operating on low supply voltages.
CAPACITIVE LOAD TOLERANCE
The LMV716, when in a unity-gain configuration, can directly
drive large capacitive loads in unity-gain without oscillation.
The unity-gain follower is the most sensitive configuration to
capacitive loading; direct capacitive loading reduces the
phase margin of amplifiers. The combination of the amplifi-
er’s output impedance and the capacitive load induces
phase lag. This results in either an underdamped pulse
response or oscillation. To drive a heavier capacitive load,
the circuit in
Figure 1
can be used.
In
Figure 1
, 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
ISO
resistor
value, the more stable V
OUT
will be.
The circuit in
Figure 2
is an improvement to the one in
Figure
1
because it provides DC accuracy as well as AC stability. If
there were a load resistor in
Figure 1
, the output would be
voltage divided by R
ISO
and the load resistor. Instead, in
Figure 2
, R
F
provides the DC accuracy by using feed-
forward techniques to connect V
IN
to R
L
. Due to the input
bias current of the LMV716, the designer must be cautious
when choosing the value of R
. C
and R
serve to coun-
teract the loss of phase margin by feeding the high fre-
quency component of the output signal back to the amplifi-
er’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.
DIFFERENCE AMPLIFIER
The difference amplifier allows the subtraction of two volt-
ages or, as a special case, the cancellation of a signal
common to two inputs. It is useful as a computational ampli-
fier in making a differential to single-ended conversion or in
rejecting a common mode signal.
20179507
FIGURE 1. Indirectly Driving a Capacitive Load using
Resistive Isolation
20179509
FIGURE 2. Indirectly Driving a Capacitive Load with DC
Accuracy
20179510
FIGURE 3. Difference Amplifier
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMV716MM/NOPB | 功能描述:運算放大器 - 運放 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 |
| LMV716MMX | 功能描述:運算放大器 - 運放 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 |
| LMV716MMX/NOPB | 功能描述:運算放大器 - 運放 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 |
| LMV717A EA WAF | 制造商:Texas Instruments 功能描述: |
| LMV721 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
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