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參數(shù)資料
| 型號(hào)： | LM4857SP |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, QCC28 |
| 封裝： | LLP-28 |
| 文件頁數(shù)： | 12/38頁 |
| 文件大?。?/td> | 1517K |
| 代理商： | LM4857SP |
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External Components Description
Components
1.
Functional Description
C
IN
This is the input coupling capacitor. It blocks the DC voltage and couples the input signal to the
amplifier’s input terminals. C
IN
also creates a highpass filter with the internal resistor R
i
(Input
Impedance) at f
c
= 1/(2
π
R
i
C
IN
).
This is the supply bypass capacitor. It filters the supply voltage applied to the V
DD
pin and helps
reduce the noise at the V
DD
pin.
This is the BYPASS pin capacitor. It filters the V
DD
/ 2 voltage and helps maintain the LM4857’s
PSRR.
This is the output coupling capacitor. It blocks the DC voltage and couples the output signal to the
speaker load R
L
. C
OUT
also creates a high pass filter with R
L
at f
O
= 1/(2
π
R
L
C
OUT
).
This resistor sets the gain of the National 3D effect. Please refer to the
National 3D Enhancement
section for information on selecting the value of R
3D
.
This capacitor sets the frequency at which the National 3D effect starts to occur. Please refer to the
National 3D Enhancement
section for information on selecting the value of C
3D
.
2.
C
S
3.
C
B
4.
C
OUT
5.
R
3D
6.
C
3D
Typical Performance Characteristics
(Note 11)
LM4857SP THD+N vs Frequency
LM4857SP THD+N vs Frequency
20079755
V
DD
= 5V; LLS, RLS; P
= 400mW;
R
L
= 4
; Mode 7; 0dB Gain
20079756
V
DD
= 3V; LLS, RLS; P
= 200mW;
R
L
= 4
; Mode 7; 0dB Gain
L
www.national.com
12
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PDF描述 |
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| LM4859 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:47; Connector Shell Size:40; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight |
| LM4870 | 1.1W Audio Power Amplifier with Shutdown Mode |
| LM4870M | 1.1W Audio Power Amplifier with Shutdown Mode |
| LM4871 | 1.1W Audio Power Amplifier with Shutdown Mode |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4857SP/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4857SPBD | 功能描述:BOARD EVALUATION LM4857SP RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 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:1 系列:- |
| LM4858 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Mono 1.5 W / Stereo 300mW Power Amplifier |
| LM48580 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver |
| LM48580TL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Class H, High Voltage, Haptic Piezo Actuator / Ceramic Speaker Driver |
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