- 您現在的位置：買賣IC網 > PDF目錄361043 > LMV7275 (National Semiconductor Corporation) Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input PDF資料下載
參數資料
| 型號： | LMV7275 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| 中文描述： | 單個 |
| 文件頁數： | 14/16頁 |
| 文件大小： | 494K |
| 代理商： | LMV7275 |
Typical Applications
(Continued)
NEGATIVE PEAK DETECTOR
For the negative detector, the output transistor of the com-
parator acts as a low impedance current sink. Since there is
no pull-up resistor, the only discharge path will be the 1M
resistor and any load impedance used. Decay time is
changed by varying the 1M
resistor.
SQUARE WAVE GENERATOR
A typical application for a comparator is as a square wave
oscillator. The circuit below generates a square wave whose
period is set by the RC time constant of the capacitor C
1
and
resistor R
4
. The maximum frequency is limited by the large
signal propagation delay of the comparator, and by the ca-
pacitive loading at the output, which limits the output slew
rate.
To analyze the circuit, consider it when the output is high.
That implies that the inverted input (V
C
) is lower than the
non-inverting input (V
). This causes the C
to get charged
through R
and the voltage V
increases till it is equal to the
non-inverting input. The value of V
A
at this point is
If R
1
= R
2
= R
3
then V
A1
= 2V
CC
/3
At this point the comparator switches pulling down the output
to the negative rail. The value of V
A
at this point is
If R
1
= R
2
= R
3
then V
A2
= V
CC
/3
The capacitor C
now discharges through R
, and the volt-
age V
decreases till it is equal to V
, at which point the
comparator switches again, bringing it back to the initial
stage. The time period is equal to twice the time it takes to
discharge C
from 2V
/3 to V
/3, which is given by
R
4
C
1
.ln2. Hence the formula for the frequency is:
F = 1/(2·R
4
·C
1
·ln2)
20064055
FIGURE 9. Negative Peak Detector
20064056
20064057
FIGURE 10. Squarewave Oscillator
L
www.national.com
14
相關PDF資料 |
PDF描述 |
|---|---|
| LMV7275MF | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MFX | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MG | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV7275MGX | Single & Dual, 1.8V Low Power Comparators with Rail-to-Rail Input |
| LMV751 | Low Noise, Low Vos, Single Op Amp |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMV7275IDCKRQ1 | 功能描述:Comparator General Purpose Open Drain SC-70-5 制造商:texas instruments 系列:汽車級，AEC-Q100 包裝:剪切帶（CT） 零件狀態:有效 類型:通用 元件數:1 輸出類型:開路漏極 電壓 - 電源，單/雙（±）:1.8 V ~ 5.5 V 電壓 - 輸入失調（最大值）:4mV @ 5V 電流 - 輸入偏置（最大值）:0.01μA @ 5V 電流 - 輸出（典型值）:34mA 電流 - 靜態（最大值）:14μA CMRR，PSRR（典型值）:78dB CMRR，80dB PSRR 傳播延遲（最大值）:2.1μs 滯后:- 工作溫度:-40°C ~ 85°C 封裝/外殼:5-TSSOP，SC-70-5，SOT-353 安裝類型:表面貼裝 供應商器件封裝:SC-70-5 標準包裝:1 |
| LMV7275MF | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7275MF/NOPB | 功能描述:校驗器 IC 1.8V Comp W/Open Drain RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7275MFX | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| LMV7275MFX/NOPB | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
發布緊急采購，3分鐘左右您將得到回復。