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參數(shù)資料
| 型號： | LM6211MF |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | Low Noise, RRO Operational Amplifier with CMOS Input and 24V Operation |
| 中文描述： | OP-AMP, 2800 uV OFFSET-MAX, 17 MHz BAND WIDTH, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 14/19頁 |
| 文件大?。?/td> | 1091K |
| 代理商： | LM6211MF |
Typical Applications
(Continued)
ADC INPUT DRIVER
A typical application for a high performance op amp is as an
ADC driver, which delivers the analog signal obtained from
sensors and actuators to ADCs for conversion to the digital
domain and further processing. Important requirements in
this application are a slew rate high enough to drive the ADC
input and low input referred voltage and current noise. If an
op amp is used with an ADC, it is critical that the op amp
noise does not affect the dynamic range of the ADC. The
LM6211, with low input referred voltage and current noise,
provides a great solution for this application. For example,
the LM6211 can be used to drive an ADS121021, a 12-bit
ADC from National. If it provides a gain of 10 to a maximum
input signal amplitude of 100 mV, for a bandwidth as wide as
100 kHz, the average noise seen at the input of the ADC is
only 44.6 μVrms. Hence the dynamic range of the ADC,
measured in Effective Number of Bits or ENOB, is only
reduced by 0.3 bits, despite amplifying the input signal by a
gain of 10. Low input bias currents and high input impedance
also help as they prevent the loading of the sensor and allow
the measurement system to function over a large range.
Figure 8
shows a circuit for monitoring fluid pressure in a
hydraulic system, in which the LM6211 is used to sense the
error voltage from the pressure sensor. Two LM6211 ampli-
fiers are used to make a difference amplifier which senses
the error signal, amplifies it by a gain of 100, and delivers it
to the ADC input. The ADC converts the error voltage into a
pressure reading to be displayed and drives the DAC, which
changes the voltage driving the resistance bridge sensor.
This is used to control the gain of the pressure measurement
circuit, such that the range of the sensor can be modified to
obtain the best resolution possible.
20120336
FIGURE 7. LM6211 in the Active Loop Filter for LMX2430
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 |
|---|---|
| LM6211MF/NOPB | 功能描述:運算放大器 - 運放 Low Noise RRO Op Amp w/ CMOS Inpt 24V 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 |
| LM6211MFX | 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 |
| LM6211MFX/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 |
| LM6218 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LM6218AH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Voltage-Feedback Operational Amplifier |
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