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参数资料
| 型号： | LM4851ITL/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： | 5/22页 |
| 文件大小： | 1126K |
| 代理商： | LM4851ITL/NOPB |
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 LM4851 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,
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.
TABLE 1. Bit Allocation
Data 0
Mode 1
Data 1
Mode 2
Data 2
Mode 3
Data 3
Volume 1
Data 4
Volume 2
Data 5
Volume 3
Data 6
Volume 4
Data 7
Volume 5
TABLE 2. Output Mode Selection
Output Mode #
Data 2
Data 1
Data 0
SPKR
OUT
R
OUT
L
OUT
0
SD
1
0
1
6dB x P
SD
2
010
SD
P
3
0
1
G(R+L)
SD
4
1
0
SD
GxR
GxL
5
1
0
1
G(R+L) + 6dB x P
SD
6
1
0
SD
(GxR)+P
(GxL)+P
7
1
6dBxP
(GxR)+P
(GxL)+P
P = Phone In
R = Rin
L = Lin
SD = Shutdown
G = Gain of volume control
Default Mode upon device power-up is Output Mode 0
LM4851
www.national.com
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| LM4852LQ/NOPB | 1.5 W, 3 CHANNEL, AUDIO AMPLIFIER, QCC24 |
| LM4852ITL/NOPB | 1.1 W, 3 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM4851ITLX/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) |
| LM4851LQ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Integrated Audio Amplifier System |
| LM4851LQ/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) |
| LM4852 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Integrated Audio Amplifier System |
| LM48520 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Boosted Stereo Class D Audio Power Amplifier with Output Speaker Protection and Spread Spectrum |
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