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參數資料
| 型號： | LM4884MH/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 1189K |
| 代理商： | LM4884MH/NOPB |
LM4884
2.1W Differential Input, BTL Output Stereo Audio
Amplifier with RF Suppression and Shutdown
General Description
The LM4884 features differential stereo inputs, BTL (bridge-
tied load) outputs, and four externally selectable fixed gains.
The LM4884 also features proprietary internal circuitry that
suppresses the coupling of RF signals into the chip. This is
important because certain types of RF signals (such as
GSM) can couple into audio amplifiers in such a way that
part of the signal is heard through the speaker. The RF
suppression circuitry in the LM4884 makes it well-suited for
notebook and portable applications in which strong RF sig-
nals generated by an antenna from a PC wireless card or a
cellular phone may couple audibly into the amplifier.
Operating on a single 5V supply, the LM4884 delivers 1.2W,
1.9W, or 2.1W (typ) of output power to an 8
,4,or3 BTL
load (Note 1), respectively, with less than 1% THD+N. The
LM4884’s gain is selected using two digital inputs. The nomi-
nal gain values are 6dB, 10dB, 15.6dB, and 21.6dB.
Other features of the LM4884 are that it delivers high-quality
output power from a surface-mount package, requires few
external components, has an active-low micropower shut-
down mode input, and has thermal shutdown protection.
Key Specifications
j BTL output power
R
L =3
,V
DD = 5.0V, and THD+N = 1%
2.1W (typ)
j BTL output power
R
L =4
,V
DD = 5.0V, and THD+N = 1%
1.9W (typ)
j BTL output power
R
L =8
,V
DD = 5.0V, and THD+N = 1%
1.2W (typ)
j Micropower shutdown current
0.1A (typ)
j PSRR (@ 1kHz, VDD = 5V, (Fig.1))
62dB (typ)
Features
n
Improved RF immunity, by up to 28dB over previous
designs (such as the LM4874) in selected applications.
n
Fully differential input and output
n
Internal gain set: 6dB, 10dB, 15.6dB, and 21.6dB
n
Improved "click and pop" suppression
n
Thermal shutdown protection circuit
n
Ultra low current micropower shutdown mode
n
3.0V to 5.5V operation
n
Available in space-saving exposed-DAP TSSOP
package
Applications
n
Notebook computers
n
PDAs
n
Portable electronic devices
Connection Diagram
Top View
20116302
Order Number LM4884MH
See NS Package Number MXA20A for Exposed-DAP TSSOP
Boomer is a registered trademark of National Semiconductor Corporation.
April 2005
LM4884
Boomer
2.1W
Differential
Input,
BTL
Output
Stereo
Audio
Amplifier
with
RF
Suppression
and
Shutdown
2005 National Semiconductor Corporation
DS201163
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4884MHX/NOPB | 功能描述:IC AMP AUDIO 2.6W STER 20TSSOP 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) |
| LM48860 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ground-Referenced, Ultra Low Noise, Fixed Gain Stereo Headphone Amplifier |
| LM48860TL | 制造商:Texas Instruments 功能描述:Audio Amp Headphone 2-CH Stereo 0.05W Class-AB 12-Pin Micro SMD T/R 制造商:Texas Instruments 功能描述:CLASS D AMP, STERO, 0.04W, 12MICRO |
| LM48860TL/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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 |
| LM48860TLBD | 功能描述:音頻 IC 開發工具 LM48860TL EVAL BOARD RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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