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參數(shù)資料
| 型號： | LM4865IBPX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, PBGA8 |
| 封裝： | MICRO SMD-8 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 512K |
| 代理商： | LM4865IBPX |
Application Information (Continued)
an external 1k
-5k resistor can be placed in parallel with
the internal 20k
resistor. The tradeoff for using this resistor
is increased quiescent current.
RECOMMENDED PRINTED CIRCUIT BOARD LAYOUT
PC board layout that is optimized for the SO-8 packaged
LM4865 and associated external components. Figure 7
through Figure 11 show the recommended four-layer PC
board layout for the micro SMD packaged LM4865. A
four-layer board is recommended when using the micro
SMD packaged LM4865: the two inner layers, one con-
nected to the GND pin, the other to the V
DD pin, provide
heatsinking. Both layouts are designed for use with an ex-
ternal 5V supply, 8
speakers, and 32 headphones. The
schematic for both recommended PC board layouts is Figure
1.
Both circuit boards are easy to use. Apply a 5V supply
voltage and ground to the board’s V
DD and GND pads,
respectively. Connect a speaker with an 8
minimum imped-
ance between the board’s -OUT and +OUT pads. For head-
phone use, the layout has provisions for a headphone jack,
J1. When a jack is connected as shown, inserting a head-
phone plug automatically switches off the external speaker.
10102538
FIGURE 4. Recommended SO PC board layout:
component side silkscreen
10102539
FIGURE 5. Recommended SO PC board layout:
component side layout
10102540
FIGURE 6. Recommended SO PC board layout:
bottom side layout
LM4865
www.national.com
11
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PDF描述 |
|---|---|
| LM4865MDC | 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, UUC |
| LM4865MWC | 1 CHANNEL(S), VOLUME CONTROL CIRCUIT, UUC |
| LM4866MTE/NOPB | 3.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4866MT/NOPB | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LM4866LQ/NOPB | 3.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4865M | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4865M | 制造商:Texas Instruments 功能描述:AMP AUDIO/VOLT CONTROL 0.75W 4865 |
| LM4865M/NOPB | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4865MM | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4865MM/NOPB | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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