- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358866 > LM4852LQ (NATIONAL SEMICONDUCTOR CORP) Integrated Audio Amplifier System PDF資料下載
參數(shù)資料
| 型號： | LM4852LQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 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)： | 13/21頁 |
| 文件大?。?/td> | 860K |
| 代理商： | LM4852LQ |
Application Information
I
2
C PIN DESCRIPTION
SDA: This is the serial data input pin.
SCL: This is the clock input pin.
ADR: This is the address select input pin.
I
2
C INTERFACE
The LM4852 uses a serial bus, which conforms to the I
2
C
protocol, to control the chip’s functions with two wires: clock
and data. The clock line is uni-directional. The data line is
bi-directional (open-collector) with a pullup resistor (typically
10k
).The maximum clock frequency specified by the I
2
C
standard is 400kHz. In this discussion, the master is the
controlling microcontroller and the slave is the LM4852.
The I
2
C address for the LM4852 is determined using the
ADR pin. The LM4852’s two possible I
2
C chip addresses are
of the form 110110X
0 (binary), where the X
= 0, if ADR is
logic low; and X
= 1, if ADR is logic high. If the I
2
C interface
is used to address a number of chips in a system and the
LM4852’s chip address can be changed to avoid address
conflicts.
The timing diagram for the I
2
C is shown in
Figure 2
. The data
is latched in on the stable high level of the clock and the data
line should be held high when not in use. The timing diagram
is broken up into six major sections:
The “start” signal is generated by lowering the data signal
while the clock signal is high. The start signal will alert all
devices attached to the I
2
C bus to check the incoming ad-
dress against their own chip address.
The 8-bit chip address is sent next, most significant bit first.
Each address bit must be stable while the clock level is high.
After the last bit of the address is sent, the master checks for
the LM4852’s acknowledge. The master releases the data
line high (through a pullup resistor). Then the master sends
a clock pulse. If the LM4852 has received the address
correctly, then it holds the data line low during the clock
pulse. If the data line is not low, then the master should send
a “stop” signal (discussed later) and abort the transfer.
The 8 bits of data are sent next, most significant bit first.
Each data bit should be valid while the clock level is stable
high.
After the data byte is sent, the master must generate another
acknowledge to see if the LM4852 received the data.
If the master has more data bytes to send to the LM4852,
then the master can repeat the previous two steps until all
data bytes have been sent.
The “stop” signal ends the transfer. To signal “stop”, the data
signal goes high while the clock signal is high.
200606F5
FIGURE 2. I
2
C Bus Format
200606F4
FIGURE 3. I
2
C Timing Diagram
L
www.national.com
13
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM4852ITL | Integrated Audio Amplifier System |
| LM4854IBL | 1.9W Monaural, 85mW Stereo Headphone Audio Amplifier |
| LM4854 | 1.9W Monaural, 85mW Stereo Headphone Audio Amplifier |
| LM4855IBL | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| LM4855LQ | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4852LQ/NOPB | 功能描述:IC AMP AUDIO PWR 1.5W MONO 24LLP 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) |
| LM4852LQBD | 功能描述:BOARD EVALUATION LM4852LQ RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:Boomer® 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| LM4853 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Mono 1.5 W / Stereo 300mW Power Amplifier |
| LM4853LD | 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 |
| LM4853LD/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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。