參數資料
型號: LMV791MK
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 運算放大器
英文描述: 17 MHz, Low Noise, CMOS Input, 1.8V Operational Amplifier
中文描述: OP-AMP, 1650 uV OFFSET-MAX, 14 MHz BAND WIDTH, PDSO6
封裝: TSOT-23, 6 PIN
文件頁數: 15/16頁
文件大小: 1005K
代理商: LMV791MK
Application Notes
(Continued)
SENSOR INTERFACES
LMV791’s low input bias current and low input referred noise
make it an ideal part for sensor interfaces. These circuits are
required to sense voltages of the order of a few μV, and
currents amounting to less than a nA, and hence the op amp
needs to have low voltage noise and low input bias current.
Typical applications include Infra-red (IR) thermometry, ther-
mocouple amplifiers and pH electrode buffers.
Figure 10
is
an example of a typical circuit used for measuring IR radia-
tion intensity, often used for estimating the temperature of an
object from a distance. The IR sensor generates a voltage
proportional to I, the intensity of the IR radiation falling on it.
The resistance R
A
and R
B
are selected to provide a high
gain to amplify this voltage, while C
F
is added to filter out the
high frequency noise.
20116871
FIGURE 9.
20116872
FIGURE 10. IR Radiation Sensor
L
www.national.com
15
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相關代理商/技術參數
參數描述
LMV791MK/NOPB 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
LMV791MKX 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
LMV791MKX/NOPB 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
LMV792 制造商:NSC 制造商全稱:National Semiconductor 功能描述:17 MHz, Low Noise, CMOS Input, 1.8V Operational Amplifiers
LMV792MM 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數量: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 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel