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參數(shù)資料
| 型號(hào)： | LT1227 |
| 廠(chǎng)商： | Linear Technology Corporation |
| 英文描述： | 140MHz Video Current Feedback Amplifier(140MHz ，視頻電流反饋放大器) |
| 中文描述： | 140MHz的視頻電流反饋放大器（140MHz的視頻電流反饋放大器） |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 280K |
| 代理商： | LT1227 |
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LT1227
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The LT1227 is a very fast current feedback amplifier.
Because it is a current feedback amplifier, the bandwidth
is maintained over a wide range of voltage gains. The
amplifier is designed to drive low impedance loads such as
cables with excellent linearity at high frequencies.
O
PPLICATI
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U
Feedback Resistor Selection
The small-signal bandwidth of the LT1227 is set by the
external feedback resistors and the internal junction ca-
pacitors. As a result, the bandwidth is a function of the
supply voltage, the value of the feedback resistor, the
closed-loop gain and load resistor. The characteristic
curves of Bandwidth vs Supply Voltage show the effect of
a heavy load (100
) and a light load (1k). These curves
use a solid line when the response has less than 0.5dB of
peaking and a dashed line when the response has 0.5dB to
5dB of peaking. The curves stop where the response has
more than 5dB of peaking.
At a gain of two, on
±
15V supplies with a 1k feedback
resistor, the bandwidth into a light load is over 140MHz,
but into a heavy load the bandwidth reduces to 120MHz.
The loading has this effect because there is a mild reso-
nance in the output stage that enhances the bandwidth at
light loads but has its Q reduced by the heavy load. This
enhancement is only useful at low gain settlings; at a gain
of ten it does not boost the bandwidth. At unity gain, the
enhancement is so effective the value of the feedback
resistor has very little effect. At very high closed-loop
gains, the bandwidth is limited by the gain bandwidth
product of about 1GHz. The curves show that the band-
width at a closed-loop gain of 100 is 12MHz, only one tenth
what it is at a gain of two.
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6 V
OUT
4 V
–
7
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+
2
–IN
+IN
3
CURRENT
SOURCE
BIAS
8
S/D
14k
1
5
1227 SS
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PDF描述 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1227_06 | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:140MHz Video Current Feedback Amplifier |
| LT1227C | 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:140MHz Video Current Feedback Amplifier |
| LT1227CN8 | 功能描述:IC VIDEO CURRNT FEEDBCK AMP 8DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 線(xiàn)性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動(dòng)器 輸出類(lèi)型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類(lèi)型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤(pán)（4x4） 包裝:帶卷 (TR) |
| LT1227CN8#PBF | 功能描述:IC VIDEO CURRNT FEEDBCK AMP 8DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 線(xiàn)性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類(lèi)型:滿(mǎn)擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| LT1227CN8PBF | 制造商:Linear Technology 功能描述:LT1227CN8PBF |
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