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參數(shù)資料
型號(hào): LMV821
廠商: National Semiconductor Corporation
英文描述: Low Voltage, Low Power, R-to-R Output, 5 MHz Op Amps
中文描述: 低電壓,低功耗,研究對(duì)R輸出,5兆赫運(yùn)算放大器
文件頁(yè)數(shù): 15/24頁(yè)
文件大小: 1068K
代理商: LMV821
2.5 Tri-level Voltage Detector
The tri-level voltage detector of Figure 13 provides a type of
window comparator function. It detects three different input
voltage ranges: Min-range, Mid-range, and Max-range. The
output voltage (V
) is at V
for the Min-range. V
O
is
clamped at GND for the Mid-range. For the Max-range, V
is
at V
. Figure 14 shows a V
O
vs. V
I
oscilloscope photo per
the circuit of Figure 13
Its operation is as follows: V
I
deviating from GND, causes
the diode bridge to absorb I
IN
to maintain a clamped condi-
tion (V
= 0V). Eventually, I
reaches the bias limit of the di-
ode bridge. When this limit is reached, the clamping effect
stops and the op amp responds open loop. The design equa-
tion directly preceding Figure 14 shows how to determine
the clamping range. The equation solves for the input volt-
age band on each side GND. The mid-range is twice this
voltage band.
DS100128-89
DS100128-34
FIGURE 13. Tri-level Voltage Detector
OV
-VIN
+VIN
-
+
OV
|
v |
v |
DS100128-35
FIGURE 14. X, Y Oscilloscope Trace showing V
OUT
vs
V
IN
per the Circuit of
Figure 13
www.national.com
15
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMV821_10 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:LOW-VOLTAGE RAIL-TO-RAIL OUTPUT OPERATIONAL AMPLIFIERS
LMV821AICT 功能描述:運(yùn)算放大器 - 運(yùn)放 Low Power OP AMP 400uA 5V 50nA 5.5MHz 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
LMV821AILT 功能描述:運(yùn)算放大器 - 運(yùn)放 Low Power OP AMP 400uA 5V 50nA 5.5MHz 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
LMV821AIYLT 功能描述:運(yùn)算放大器 - 運(yùn)放 Low PWR Gen Purp 400uA 5V 50nA 5.5MHz 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
LMV821DBVR 功能描述:運(yùn)算放大器 - 運(yùn)放 Single Low-Voltage Low Power RRO 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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