參數(shù)資料
型號(hào)： LM4910MMX/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： 0.035 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝： MSOP-8
文件頁(yè)數(shù)： 11/22頁(yè)
文件大?。?/td> 828K
代理商： LM4910MMX/NOPB
Application Information (Continued)
LM4910 Reference Design Boards
Bill of Materials
Part Description
Qty
Ref Designator
LM4910 Mono Reference Design Board
1
LM4910 Audio AMP
1
U1
Tantalum Cap 1F 16V 10
1
Cs
Ceramic Cap 0.39F 50V Z50 20
2
Ci
Resistor 20k
1/10W 5
4
Ri, Rf
Resistor 100k
1/10W 5
1
Rpu
Jumper Header Vertical Mount 2X1, 0.100
1
J1
PCB LAYOUT GUIDELINES
This section provides practical guidelines for mixed signal
PCB layout that involves various digital/analog power and
ground traces. Designers should note that these are only
"rule-of-thumb" recommendations and the actual results will
depend heavily on the final layout.
Minimization of THD
PCB trace impedance on the power, ground, and all output
traces should be minimized to achieve optimal THD perfor-
mance. Therefore, use PCB traces that are as wide as
possible for these connections. As the gain of the amplifier is
increased, the trace impedance will have an ever increasing
adverse affect on THD performance. At unity-gain (0dB) the
parasitic trace impedance effect on THD performance is
reduced but still a negative factor in the THD performance of
the LM4910 in a given application.
GENERAL MIXED SIGNAL LAYOUT
RECOMMENDATION
Power and Ground Circuits
For two layer mixed signal design, it is important to isolate
the digital power and ground trace paths from the analog
power and ground trace paths. Star trace routing techniques
(bringing individual traces back to a central point rather than
daisy chaining traces together in a serial manner) can
greatly enhance low level signal performance. Star trace
routing refers to using individual traces to feed power and
ground to each circuit or even device. This technique will
require a greater amount of design time but will not increase
the final price of the board. The only extra parts required may
be some jumpers.
Single-Point Power / Ground Connections
The analog power traces should be connected to the digital
traces through a single point (link). A "PI-filter" can be helpful
in minimizing high frequency noise coupling between the
analog and digital sections. Further, place digital and analog
power traces over the corresponding digital and analog
ground traces to minimize noise coupling.
Placement of Digital and Analog Components
All digital components and high-speed digital signal traces
should be located as far away as possible from analog
components and circuit traces.
Avoiding Typical Design / Layout Problems
Avoid ground loops or running digital and analog traces
parallel to each other (side-by-side) on the same PCB layer.
When traces must cross over each other do it at 90 degrees.
Running digital and analog traces at 90 degrees to each
other from the top to the bottom side as much as possible will
minimize capacitive noise coupling and cross talk.
LM4910
www.national.com
19
相關(guān)PDF資料
PDF描述
LM4911LD/NOPB 0.145 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO10
LM4913MH/NOPB 0.09 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10
LM4914MH/NOPB 0.085 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10
LM4915LQ/NOPB 0.4 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC8
LM4918LQ/NOPB 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4911 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output
LM4911LD 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 40mW Low Noise Headphone Amplifier with Selectable Capacitive Coupled or OCL Output
LM4911LD/NOPB 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4911LDX 功能描述:IC AMP AUDIO PWR .145W AB 10LLP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4911MM 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*