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参数资料
| 型号： | LM4832M/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| 封装： | SOIC-28 |
| 文件页数： | 9/23页 |
| 文件大小： | 577K |
| 代理商： | LM4832M/NOPB |
Application Information (Continued)
GENERAL PURPOSE OUTPUT PIN
The General Purpose Output pin is intended to be used as a
control signal for other devices, such as an external power
amplifier. This pin is controlled through the I
2C interface and
is not relatedto any other functions within the LM4832. Refer
to the Truth Tables section for the proper I
2C data bits to
utilize this function.
Figure 7 shows an example of using the General Purpose
Output to interface with an external power amp. In this case,
the external power amp is the LM4755 stereo 10 watt per
channel (rms) power amplifier with mute. AC-coupling ca-
pacitors must be used to remove the DC bias present be-
tween the LM4832 outputs and the external power amplifier
inputs.
Prior to placing any of the preamp circuitry in shutdown, the
General Purpose Output should be used to disable the ex-
ternal power amplifier.This will prevent any shutdown tran-
sients in the preamp circuitry from being amplified by the
external power amplifier.
LOOP IN/OUT PINS
The Loop In and Loop Out pins are used when an application
requires a special function to be performed on the audio
signal. As shown in Figure 7, the audio signal is taken from
the Loop Out pin and sent to an external signal processor.
After the signal is processed externally, it is fed back into the
Loop In pin.
An example of where this functionality would be used is
computer speakers. The external loop could be used to
provide bass boost to counteract the speaker’s natural or
baffle-induced rolloff.
Since the Loop In pin goes directly to the input of a CMOS
amplifier, the input impedance is very high. The Loop Out pin
is driven by the input attenuation amplifier, which is capable
of driving impedances as low as 1 k
.
10001429
FIGURE 6. Tone Control Diagram
10001430
10W/ch System with I
2C Controlled Tone,Volume and 3D Sound
FIGURE 7.
LM4832
www.national.com
17
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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) |
| LM4832MX | 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 |
| LM4832MX/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) |
| LM4832N | 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 |
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