- 您现在的位置：买卖IC网 > PDF目录30753 > LM4854LDX/NOPB (NATIONAL SEMICONDUCTOR CORP) 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 PDF资料下载
参数资料
| 型号： | LM4854LDX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| 封装： | LLP-14 |
| 文件页数： | 10/29页 |
| 文件大小： | 1440K |
| 代理商： | LM4854LDX/NOPB |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
Typical Performance Characteristics (Continued)
Channel-to-Channel Crosstalk
vs Frequency
Channel-to-Channel Crosstalk
vs Frequency
200382D4
V
DD = 5V, RL =16
(SE)
A = Left channel driven, right channel measured
B = Right channel driven, left channel measured
200382D5
V
DD = 5V, RL =32
(SE)
A = Left channel driven, right channel measured
B = Right channel driven, left channel measured
Channel-to-Channel Crosstalk
vs Frequency
Channel-to-Channel Crosstalk
vs Frequency
200382D6
V
DD = 3V, RL =16
(SE)
A = Left channel driven, right channel measured
B = Right channel driven, left channel measured
200382D7
V
DD = 3V, RL =32
(SE)
A = Left channel driven, right channel measured
B = Right channel driven, left channel measured
Application Information
ELIMINATING OUTPUT COUPLING CAPACITORS
Typical single-supply audio amplifiers that can switch be-
tween driving bridge-tied-load (BTL) speakers and single-
ended (SE) headphones use a coupling capacitor on each
SE output. This capacitor blocks the half-supply voltage to
which the output amplifiers are typically biased and couples
the audio signal to the headphones. The signal returns to
circuit ground through the headphone jack’s sleeve.
The LM4854 eliminates these coupling capacitors. When the
LM4854 is configured to drive SE loads, AMP2 is internally
configured to apply V
DD/2 to a stereo headphone jack’s
sleeve. This voltage equals the quiescent voltage present on
the Amp1 and Amp3 outputs that drive the headphones.
Headphones driven by the LM4854 operate in a manner very
similar to a BTL load. The same DC voltage is applied to
each input terminal on a headphone speaker. This results in
no net DC current flow through the speaker. AC current flows
through a headphone speaker as an audio signal’s output
amplitude increases on one of the speaker’s terminal.
When operating as a headphone amplifier, the headphone
jack sleeve is not connected to circuit ground, but to V
DD/2.
Using the headphone output jack as a line-level output will
place the LM4854’s one-half supply voltage on a plug’s
sleeve connection. Driving a portable notebook computer or
audio-visual display equipment is possible. This presents no
difficulty when the external equipment uses capacitively
coupled inputs. For the very small minority of equipment that
is DC-coupled, the LM4854 monitors the current supplied by
LM4854
www.national.com
18
相关PDF资料 |
PDF描述 |
|---|---|
| LM4856LQ/NOPB | 1.5 W, 3 CHANNEL, AUDIO AMPLIFIER, QCC24 |
| LM4856ITL/NOPB | 1.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| LM4857GR/NOPB | SPECIALTY CONSUMER CIRCUIT, PBGA49 |
| LM4858MM/NOPB | 1.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| LM4858LD/NOPB | 1.7 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4854MM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:AUDIO AMPLIFIER|DUAL|TSSOP|10PIN|PLASTIC |
| LM4854MT | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM4854MT/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4854MTX/NOPB | 功能描述:IC AMP AUDIO PWR 2.3W AB 14TSSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4855 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
发布紧急采购，3分钟左右您将得到回复。