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參數(shù)資料
| 型號： | LM4832MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| 中文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數(shù)： | 15/22頁 |
| 文件大小： | 688K |
| 代理商： | LM4832MX |
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
2
C interface and
is not relatedto any other functions within the LM4832. Refer
to the Truth Tables section for the proper I
2
C data bits to uti-
lize 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 exter-
nal power amplifier.This will prevent any shutdown transients
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 sig-
nal. 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 com-
puter 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
.
DS100014-29
FIGURE 6. Tone Control Diagram
DS100014-30
10W/ch System with I
2
C Controlled Tone,Volume and 3D Sound
15
www.national.com
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PDF描述 |
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| LM4832 | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832M | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832N | Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4834 | 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
| LM4834MS | 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4832MX/NOPB | 功能描述:IC AMP AUDIO PWR .25W AB 28SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4832N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound |
| LM4832N/NOPB | 功能描述:IC AMP AUDIO PWR .25W STER 28DIP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4834 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
| LM4834A E WAF | 制造商:Texas Instruments 功能描述: |
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