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參數(shù)資料
| 型號： | LMH6643MDC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 CHANNEL, VIDEO AMPLIFIER, UUC |
| 封裝： | DIE |
| 文件頁數(shù)： | 10/26頁 |
| 文件大小： | 902K |
| 代理商： | LMH6643MDC |
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
LMH6642MA
8-Pin SOIC
CLC730027
LMH6643MA
8-Pin SOIC
CLC730036
LMH6643MM
8-Pin MSOP
CLC730123
LMH6644MA
14-Pin SOIC
CLC730031
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
selection. 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.
Either way, keeping the resistor values lower, will diminish
this interaction to a large extent. On the other hand, choos-
ing very low value resistors could load down nodes and will
contribute to higher overall power dissipation.
Ordering Information
Package
Part Number
Package Marking
Transport Media
NSC Drawing
5-Pin SOT-23
LMH6642MF
A64A
1k Units Tape and Reel
MF05A
LMH6642MFX
3k Units Tape and Reel
SOIC-8
LMH6642MA
Rails
M08A
LMH6642MAX
2.5k Units Tape and Reel
LMH6643MA
Rails
LMH6643MAX
2.5k Units Tape and Reel
MSOP-8
LMH6643MM
A65A
1k Units Tape and Reel
MUA08A
LMH6643MMX
3.5k Units Tape and Reel
SOIC-14
LMH6644MA
Rails
M14A
LNH6644MAX
2.5k Units Tape and Reel
TSSOP-14
LMH6644MT
Rails
MTC14
LMH6644MTX
2.5k Units Tape and Reel
20018565
FIGURE 4. Converter Step Response (1V
PP, 20 ns/DIV)
LMH6642/6643/6644
www.national.com
18
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMH6643MM | 功能描述:運算放大器 - 運放 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:運算放大器 - 運放 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:運算放大器 - 運放 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:運算放大器 - 運放 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: |
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