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参数资料
| 型号： | LM4852ITL/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| 封装： | MICRO SMD-18 |
| 文件页数： | 5/21页 |
| 文件大小： | 860K |
| 代理商： | LM4852ITL/NOPB |
Application Information
I
2C 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
2C INTERFACE
The LM4852 uses a serial bus, which conforms to the I
2C
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 I2C
standard is 400kHz. In this discussion, the master is the
controlling microcontroller and the slave is the LM4852.
The I
2C address for the LM4852 is determined using the
ADR pin. The LM4852’s two possible I
2C chip addresses are
of the form 110110X
10 (binary), where the X1 = 0, if ADR is
logic low; and X
1 = 1, if ADR is logic high. If the I
2C 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
2C 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
2C 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
2C Bus Format
200606F4
FIGURE 3. I
2C Timing Diagram
LM4852
www.national.com
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| LM4854MT/NOPB | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4854MTX/NOPB | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4854LD/NOPB | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
| LM4854LDX/NOPB | 0.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO14 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4852ITLX/NOPB | 功能描述:IC AMP AUDIO PWR 1.5W AB 18USMD RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4852LQ | 制造商:Texas Instruments 功能描述:1W MONO 100MW STEREO SUBSYST 4852 |
| LM4852LQ/NOPB | 功能描述:IC AMP AUDIO PWR 1.5W MONO 24LLP RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:Boomer® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| LM4852LQBD | 功能描述:BOARD EVALUATION LM4852LQ RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:Boomer® 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压: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 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| LM4853 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Mono 1.5 W / Stereo 300mW Power Amplifier |
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