參數(shù)資料
型號(hào): LMH6678LQ
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 通用總線功能
英文描述: Low Power 2-Channel Central-Office xDSL Driver
中文描述: DUAL LINE DRIVER, QCC24
封裝: 5 X 4 MM, LLP-24
文件頁(yè)數(shù): 16/17頁(yè)
文件大?。?/td> 1792K
代理商: LMH6678LQ
Application Notes
(Continued)
HIGH SPEED DRIVER LAYOUT GUIDELINES
The LMH6678 is a high performance differential line ampli-
fier that requires proper layout for best performance.
Keep power-supply leads as short as possible. This will
keep inductance low and resistive losses at a minimum.
Proper power-supply bypassing with low ESR capacitors
is essential to achieve good performance. A parallel com-
bination of small (around 0.1 μF) ceramic and bigger (6.8
μF) tantalum bypass capacitors will provide low and im-
pedance over a wide frequency rage.
Bypass capacitor should be placed as close as possible,
limited by pick and place machine requirement, to the
power-supply pins of the LMH6678 (ceramic cap first and
then tantalum cap).
PCB traces conducting high currents, such as from out-
put to load or from power-supply connector to the power-
supply pins of the LMH6678 should be kept as wide and
short as possible to minimize inductance and resistive
loss.
The six holes in the landing pattern for the LMH6678 are
for the thermal vias that connect the thermal pad of LLP
package to the internal/external ground plane on the
PCB.
For detail information on the LLP package including thermal
modeling considerations and prepared procedures, please
see National Semiconductor.
"Applications Note 1187: Leadless Leadframe Package
(LLP)" located at www.national.com.
20084048
FIGURE 9. Via Connection Not Recommended Under
the Thermal Pad
20084049
FIGURE 10. Via Connection Recommended For Use in
Thermal Pad
L
www.national.com
16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMH6678LQX 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Low Power 2-Channel Central-Office xDSL Driver
LMH6682 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:190MHz Single Supply, Dual and Triple Operational Amplifiers
LMH6682MA 制造商:Texas Instruments 功能描述:OP Amp Dual Volt Fdbk ±6V/12V 8-Pin SOIC N Rail 制造商:Texas Instruments 功能描述:AMP, VIDEO DUAL, SMD, SOIC8, 6682
LMH6682MA/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)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(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
LMH6682MAX 功能描述:運(yùn)算放大器 - 運(yùn)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(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