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參數(shù)資料
| 型號： | LM4855LQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| 中文描述： | 1.5 W, 3 CHANNEL, AUDIO AMPLIFIER, QCC24 |
| 封裝： | LLP-24 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 1116K |
| 代理商： | LM4855LQ |
APPLICATION INFORMATION
SPI PIN DESCRIPTION
DATA: This is the serial data input pin.
CLK: This is the clock input pin.
ENB: This is the SPI enable pin and is active-high.
SPI OPERATION DESCRIPTION
The serial data bits are organized into a field which contains
8 bits of data defined by TABLE 1. The Data 0 to Data 2 bits
determine the output mode of the LM4855 as shown in
TABLE 2. The Data 3 to Data 7 bits determine the volume
level setting as illustrated by TABLE 3. For each SPI transfer,
TABLE 1. Bit Allocation
the data bits are written to the DATA pin with the least
significant bit (LSB) first. All serial data are sampled at the
rising edge of the CLK signal. Once all the data bits have
been sampled, ENB transitions from logic-high to logic-low
to complete the SPI sequence. All 8 bits must be received
before any data latch can occur. Any excess CLK and DATA
transitions will be ignored after the eighth rising clock edge
has occurred. For any data sequence longer than 8 bits, only
the first 8 bits will get loaded into the shift register and the
rest of the bits will be disregarded.
Data 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Mode Select
Mode Select
Mode Select
Volume Control
Volume Control
Volume Control
Volume Control
Volume Control
TABLE 2. Output Mode Selection
Output Mode #
0
1
2
3
4
5
6
7
R = Rin
L = Lin
P
IHF
= Phone_In_IHF
P
HS
= Phone_In_HS
SD = Shutdown Mode
MUTE = Mute Mode
G1 = gain from P
HS
to LOUT/ROUT
G2 = gain from LIN/ RIN to LOUT/ROUT
Default Mode upon device power-up is Output Mode 0
Data 2
0
0
0
0
1
1
1
1
Data 1
0
0
1
1
0
0
1
1
Data 0
0
1
0
1
0
1
0
1
SPKR
OUT
SD
12dB x P
IHF
MUTE
12dB x P
IHF
MUTE
12dB x P
IHF
MUTE
12dB x P
IHF
R
OUT
SD
SD
G1 x P
HS
G1 x P
HS
G2 x R
G2 x R
L
OUT
SD
SD
G1 x P
HS
G1 x P
HS
G2 x L
G2 x L
(G1 x P
HS
) + (G2 x R)
(G1 x P
HS
) + (G2 x R)
(G1 x P
HS
) + (G2 x L)
(G1 x P
HS
) + (G2 x L)
L
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4855ITL | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| LM4855 | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| LM4857 | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4857GR | Stereo 1.2W Audio Sub-system with 3D Enhancement |
| LM4857ITL | Stereo 1.2W Audio Sub-system with 3D Enhancement |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4855LQ/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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4855LQBD | 功能描述:BOARD EVALUATION LM4855LQ RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 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:1 系列:- |
| LM4855LQX/NOPB | 制造商:Texas Instruments 功能描述:Audio Amp Headphone/Speaker 1-CH Mono/2-CH Stereo 1.5W Class-AB 24-Pin LLP EP T/R |
| LM4856 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Integrated Audio Amplifier System |
| LM48560 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Voltage Class H Ceramic Speaker Driver with Automatic Level Control |
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