參數(shù)資料
型號: LMH6643MAXEP/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 1 CHANNEL, VIDEO AMPLIFIER, PDSO8
封裝: PLASTIC, SOIC-8
文件頁數(shù): 10/21頁
文件大?。?/td> 966K
代理商: LMH6643MAXEP/NOPB
Application Notes (Continued)
For this example, optimum C
f was empirically determined to
be around 5pF. This time domain response is shown in
Figure 4 below showing about 9ns rise/fall times, corre-
sponding to about 39MHz for f
p. The overall supply current
from the +5V supply is around 5mA with no load.
PRINTED CIRCUIT BOARD LAYOUT AND COMPONENT
VALUES SECTIONS
Generally, a good high frequency layout will keep power
supply and ground traces away from the inverting input and
output pins. Parasitic capacitances on these nodes to
ground will cause frequency response peaking and possible
circuit oscillations (see Application Note OA-15 for more
information). National Semiconductor suggests the following
evaluation boards as a guide for high frequency layout and
as an aid in device testing and characterization:
Device
Package
Evaluation
Board PN
LMH6642MF
SOT23-5
CLC730068
LMH6642MF
8-Pin SOIC
CLC730027
LMH6643MA
8-Pin SOIC
CLC730036
LMH6643MA
8-Pin MSOP
CLC730123
LMH6644MA
14-Pin SOIC
CLC730031
LMH6644MA
14-Pin TSSOP
CLC730131
These free evaluation boards are shipped when a device
sample request is placed with National Semiconductor.
Another important parameter in working with high speed/
high performance amplifiers, is the component values selec-
tion. Choosing external resistors that are large in value will
effect the closed loop behavior of the stage because of the
interaction of these resistors with parasitic capacitances.
These capacitors could be inherent to the device or a by-
product of the board layout and component placement. Ei-
ther way, keeping the resistor values lower, will diminish this
interaction to a large extent. On the other hand, choosing
very low value resistors could load down nodes and will
contribute to higher overall power dissipation.
20089465
FIGURE 4. Converter Step Response (1V
PP, 20 ns/DIV)
LMH6642EP/LMH6643EP/LMH6644EP
Enhanced
Plastic
www.national.com
18
相關(guān)PDF資料
PDF描述
LMH6642MFXEP/NOPB 1 CHANNEL, VIDEO AMPLIFIER, PDSO5
LMH6644MAXEP/NOPB 1 CHANNEL, VIDEO AMPLIFIER, PDSO14
LMH6643MDC 2 CHANNEL, VIDEO AMPLIFIER, UUC
LMH6643MWC 2 CHANNEL, VIDEO AMPLIFIER, UUC
LMH6702J-QML/NOPB 1 CHANNEL, VIDEO AMPLIFIER, CDIP8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMH6643MM 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
LMH6643MM/NOPB 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual Rr0 +3V High Speed Amp 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
LMH6643MMX 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
LMH6643MMX/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
LMH6643MMX/S5001341 制造商:Texas Instruments 功能描述: