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参数资料
| 型号： | LM4831VFX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封装： | TQFP-44 |
| 文件页数： | 2/13页 |
| 文件大小： | 575K |
| 代理商： | LM4831VFX |
Typical Performance Characteristic (Continued)
Application Information
GROUNDING
Certain grounding techniques should be followed when lay-
ing out the LM4831 circuit.
Figure 4 shows how to setup the
grounds for the LM4831. The half-supply bypass ground
should be tied with the input source grounds and brought
back to the power supply ground separately from the output
load grounds. in with the input grounds. Bringing the output
load grounds back to the supply separately will keep large
signal currents from interfering with the stable input ground
references.
LAYOUT
As stated in the Grounding section, placement of ground re-
turn lines is critical for maintaining the highest level of sys-
tem performance. It is not only important to route the correct
ground return lines together, but also important to be aware
of where those ground return lines are routed relative to
each other. The output load ground returns should be physi-
cally located as far as reasonably possible from low signal
level lines and their ground return lines. The layout of the mi-
crophone amplifier signal lines is critical, since these lines
generally work at very low signal levels.
SUPPLY BYPASSING
As with all op amps and power op amps, the LM4831 re-
quires the power supplies to be bypassed to reduce distor-
tion and avoid oscillation. To avoid high frequency instabili-
ties, a 0.1F metallized-film or ceramic capacitor should be
used to bypass each supply pin as near to the chip as pos-
Line Out
THD+N vs Frequency
DS100057-9
Line Out
Noise Floor
DS100057-10
Equalizer Output
THD+N vs Frequency
DS100057-7
Equalizer Output
Noise Floor
DS100057-8
DS100057-99
FIGURE 4. Grounding Strategy for LM4831
LM4831
www.national.com
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相关代理商/技术参数 |
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| LM4832 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832M | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832M/NOPB | 功能描述:IC AMP AUDIO PWR .25W AB 28SOIC 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) |
| LM4832MT/NOPB | 功能描述:IC AMP AUDIO PWR .25W AB 28TSSOP 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) |
| LM4832MTX/NOPB | 功能描述:IC AMP AUDIO PWR .25W AB 28TSSOP 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) |
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