參數(shù)資料
型號： LM4831VF
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 消費家電
英文描述： Multimedia Computer Audio Chip
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP44
封裝： TQFP-44
文件頁數(shù)： 6/12頁
文件大?。?/td> 575K
代理商： LM4831VF
Pin Descriptions
(Continued)
PWRDWN
This pin is used to power down the
entire IC (except BEEP Circuitry).
Placing a logic high on the PWRDWN
pin will place the LM4831 in a low
supply current state. To minimize the
shutdown-mode supply current, the
PWRDWN pin should be pulled up to
the voltage on the LM4831 power
supply pins. The PWRDWN pin is
overridden if an edge change occurs
on any of the BEEP A–D inputs.
L_INA,
L_INB,
L_INC
These pins are the left channel inputs.
Typical input impedance on each input
is 20 k
.
R_INA,
R_INB,
R_INC
These pins are the right channel
inputs. Typical input impedance on
each input is 20 k
.
L_MIX,
R_MIX
These pins are the inverting input
nodes of the input mixer for the left
and right channel, respectively.
L_EQOUT,
R_EQOUT
These are the outputs of the input
mixer for the left and right channel,
respectively. This output is generally
fed to an external filter to equalize the
response of internal computer
speakers and then back into the EQIN
pins.
L_EQIN,
R_EQIN
These pins are one of the two inputs
to the 2:1 analog multiplexer and are
used to feed in externally filtered
versions of the EQOUT signals. The
2:1 multiplexer selects the signal on
L_EQIN and R_EQIN if the HP_IN
and DS_IN pins are both low.
L_MUX,
R_MUX
These are the stereo outputs of the
2:1 analog multiplexer. The output of
the 2:1 multiplexer is decided by the
state of the HP-IN and DS-IN pins. If
both HP-IN and DS-IN are low, the 2:1
mux selects the analog input on the
EQIN pins. If either HP-IN or DS-IN is
high, the 2:1 mux selects the internal
analog path. See .
L_LINEOUT,
R_LINEOUT
These are the line outputs for the left
and right channel, respectively.
Although these outputs are capable of
driving a wide range of resistive loads,
they are typically used to drive an
impedance of at least 10 k
. These
outputs are only enabled when the
DS-IN pin is high, otherwise, they are
in a high-impedance state.
L_PA+IN,
R_PA+IN
These pins are the positive inputs of
the output audio power amplifiers.
Since the power amplifier is typically
configured as an inverting amplifier,
these pins should be connected to the
BYPASS pin to properly bias the
output power amplifiers. Further, these
pins should be individually bypassed
with a capacitor of 0.01 μF–0.1 μF.
L_PAIN,
R_PAIN
These pins are the inverting inputs for
the output audio power amplifier for
the left and right channel, respectively.
L_PAOUT,
R_PAOUT
These pins are the inverted power
amp outputs for the left and right
channel, respectively. In bridged mode
(DS-IN = HP_IN = PWRDWN = low),
each output drives one terminal of a
direct coupled bridged speaker. In
single-ended (headphone) mode,
(HP_IN = high, PWRDWN = low,
DS-IN = N/A) these outputs drive a
capacitively coupled stereo
headphone. In docking station mode
(DS-IN = high, HP_IN = PWRDWN =
low), these outputs are disabled.
L_PA+OUT,
R_PA+OUT
These pins are the non-inverted power
amp outputs for the left and right
channel, respectively. In bridged mode
(DS-IN = HP_IN = PWRDWN = low),
each output drives one terminal of a
direct coupled bridged speaker. In
single-ended (headphone) mode
(HP_IN = high, PWRDWN = low,
DS-IN = N/A), these outputs are in a
high impedance state, effectively
muting the bridged loudspeaker. In
docking station mode (DS-IN = high,
HP_IN = PWRDWN = low), these
outputs are disabled.
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相關(guān)PDF資料
PDF描述
LM4831 Multimedia Computer Audio Chip
LM4832MX Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D Sound
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4831VFX 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:
LM4832 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
LM4832M 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
LM4832M/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(shù)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(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
LM4832MT/NOPB 功能描述:IC AMP AUDIO PWR .25W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)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(shù)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(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
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