參數(shù)資料
型號(hào): LM4831VFX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP44
封裝: TQFP-44
文件頁(yè)數(shù): 4/13頁(yè)
文件大小: 575K
代理商: LM4831VFX
Application Information (Continued)
LM4831. The microphone input pin is connected to the in-
verting node of a CMOS op amp, so the input impedance is
very high (>10M
)
BEEP CIRCUITRY
The beep circuitry is designed to allow a “sleeping” system to
temporarily power-up the LM4831 and output an audio alert
(“beep”). This feature might be used in a computer which is
“sleeping”, but needs to notify the user that the computer
batteries are low or that the user has new e-mail.
The beep circuitry is activated by any edge which occurs on
the BEEP A-D pins. With a resistor, R
beep, and a capacitor,
C
beep, in parallel at the RC pin of the LM4831, the LM4831
will be activated for R
beep Cbeep seconds. Typical values for
R
beep and Rbeep are 1-10M and 0.1F.
The BEEP OUT pin is designed to signal other audio circuitry
that the LM4831 is powering up. Generally a CODEC will re-
ceive this signal and begin sending audio information to the
LM4831. Logically, the BEEP OUT signal is the result of an
XOR of the BEEP A-D pins.
LM4831
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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(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)
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(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)
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