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參數資料
| 型號： | LM4840 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | RES 20.5 OHM 1/10W 1% 0603 SMD |
| 中文描述： | 立體聲2W的音頻功率放大器與數字音量控制和輸入復用器 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 786K |
| 代理商： | LM4840 |
LM4840
Stereo 2W Audio Power Amplifiers
with Digital Volume Control and Input Mux
General Description
The LM4840 is a monolithic integrated circuit that provides
digital volume control and stereo bridged audio power am-
plifiers capable of producing 2W into 4
(Note 1) with less
than 1.0% THD or 2.2W into 3
(Note 2) with less than 1.0%
THD.
Boomer
audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4840 incorporates a
digital volume control, stereo bridged audio power amplifiers,
an input mux, and a last volume level memory function to
save the volume setting during shutdown. These features
make it optimally suited for multimedia monitors, portable
radios, desktop, and portable computer applications.
The LM4840 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
Note 1:
When properly mounted to the circuit board, the LM4840LQ and
LM4840MH will deliver 2W into 4
. The LM4840MT will deliver 1.1W into 8
.
See the Application Information section LM4840LQ and for LM4840MH us-
age information.
Note 2:
An LM4840LQ and LM4840MH that have been properly mounted to
the circuit board and forced-air cooled will deliver 2.2W into 3
.
Key Specifications
n
P
O
at 1% THD+N
n
into 3
(LM4840LQ, LM4840MH)
n
into 4
(LM4840LQ, LM4840MH)
n
into 8
(LM4840)
n
Single-ended mode - THD+N at 85mW into 32
(typ)
n
Shutdown current
2.2W (typ)
2.0W (typ)
1.1W (typ)
1.0%
0.2μA (typ)
Features
n
PC98 and PC99 Compliant
n
Digital Volume Control Interface
n
System Beep Detect
n
Stereo switchable bridged/single-ended power amplifiers
n
“Click and pop” suppression circuitry
n
Thermal shutdown protection circuitry
n
Input Mux
n
Capless headphone drivers
n
Last volume memory from shutdown
Applications
n
Portable and Desktop Computers
n
Multimedia Monitors
n
Portable Radios, PDAs, and Portable TVs
Connection Diagram
Boomer
is a registered trademark of NationalSemiconductor Corporation.
LLP Package
DS200104-35
Top View
Order Number LM4840LQ
See NS Package Number LQA028A for Exposed-DAP LLP
December 2001
L
2001 National Semiconductor Corporation
DS200104
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LM4840LQ | Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux |
| LM4840MH | Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux |
| LM4840MT | Stereo 2W Audio Power Amplifiers with Digital Volume Control and Input Mux |
| LM4841 | Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive |
| LM4841LQ | Stereo 2W Amplifiers with DC Volume Control, Transient Free Outputs, and Cap-less Headphone Drive |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM4840LQ | 制造商:Texas Instruments 功能描述:AMP AUDIO POWER DC VOLT LLP-28 |
| LM4840LQ/NOPB | 功能描述:IC AMP AUDIO PWR 2.2W STER 28LLP 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) |
| LM4840MH | 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28 |
| LM4840MH/NOPB | 功能描述:IC AMP AUDIO PWR 2.2W AB 28TSSOP 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) |
| LM4840MT | 制造商:Texas Instruments 功能描述:AMP AUDIO STEREO 2W SMD TSSOP28 |
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