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參數資料
| 型號： | LM4894MWC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC |
| 封裝： | WAFER |
| 文件頁數： | 13/21頁 |
| 文件大?。?/td> | 781K |
| 代理商： | LM4894MWC |
National P/N LM4894 - 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select
LM4894 MDC
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LM4894 MWC
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General Description
The LM4894 is a fully differential audio power amplifier primarily designed for demanding applications in
mobile phones and other portable communication device applications. It is capable of delivering 1 watt of
continuous average power to an 8
BTL load with less than 1% distortion (THD+N) from a 5VDC power
supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a
minimal amount of external components. The LM4894 does not require output coupling capacitors or
bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications
where minimal power consumption is a primary requirement.
The LM4894 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled
by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low
enables the shutdown select pin to be driven in a likewise manner to enable Shutdown. Additionally, the
LM4894 features an internal thermal shutdown protection mechanism.
The LM4894 contains advanced pop & click circuitry which eliminates noises which would otherwise occur
during turn-on and turn-off transitions.
The LM4894 is unity-gain stable and can be configured by external gain-setting resistors.
Features
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Fully differential amplification
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Available in space-saving packages micro SMD, MSOP, and LLP
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Ultra low current shutdown mode
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Can drive capacitive loads up to 500 pF
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Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
q
2.2 - 5.5V operation
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No output coupling capacitors, snubber networks or bootstrap capacitors required
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Unity-gain stable
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External gain configuration capability
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Shutdown high or low selectivity
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High CMRR
Key Specification
Improved PSRR at 217Hz
80dB(typ)
Power Output at 5.0V & 1% THD
1.0W(typ)
Power Output at 3.3V & 1% THD 400mW(typ)
Shutdown Current
0.1A(typ)
Applications
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM4894.html (2 of 3) [09-Aug-2002 2:51:00 PM]
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| LM4895MM/NOPB | 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4895 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain |
| LM4895A E WAF | 制造商:Texas Instruments 功能描述: |
| LM4895IBP | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1 Watt Fully Differential Audio Power Amplifier With Shutdown Select and Fixed 6dB Gain |
| LM4895IBP/NOPB | 功能描述:IC AMP AUDIO PWR 1.4W MONO 9USMD RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4895IBPX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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