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ADM8840ACP-REEL7 PDF预览

ADM8840ACP-REEL7

更新时间: 2024-01-14 12:38:29
品牌 Logo 应用领域
罗彻斯特 - ROCHESTER /
页数 文件大小 规格书
11页 847K
描述
SWITCHED CAPACITOR REGULATOR, CQCC32, 5 X 5 MM, LFCSP-32

ADM8840ACP-REEL7 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Active零件包装代码:QFN
包装说明:VQCCN,针数:32
Reach Compliance Code:unknown风险等级:5.23
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHED CAPACITOR REGULATOR
最大输入电压:3.6 V最小输入电压:2.7 V
标称输入电压:3.3 VJESD-30 代码:S-CQCC-N32
JESD-609代码:e0长度:5 mm
湿度敏感等级:3功能数量:1
端子数量:32最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:CERAMIC, METAL-SEALED COFIRED
封装代码:VQCCN封装形状:SQUARE
封装形式:CHIP CARRIER, VERY THIN PROFILE峰值回流温度(摄氏度):240
认证状态:COMMERCIAL座面最大高度:0.9 mm
表面贴装:YES切换器配置:TRIPLER
技术:CMOS温度等级:INDUSTRIAL
端子面层:TIN LEAD端子形式:NO LEAD
端子节距:0.5 mm端子位置:QUAD
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:5 mm
Base Number Matches:1

ADM8840ACP-REEL7 数据手册

 浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第5页浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第6页浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第7页浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第9页浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第10页浏览型号ADM8840ACP-REEL7的Datasheet PDF文件第11页 
PRELIMINARY TECHNICAL DATA  
ADM8840  
SERIAL INTERFACE  
DAC ± which sets the Centre Voltage of the output. The  
individual data bits are then read in one by one on the DATA  
line. After the DAC_SEL bit and the 8 data bits have been  
read there is a pause to ensure the shift register outputs are  
stable. Then a rising edge on the CS/LDAC input loads the  
8 bits on the shift register outputs into the relevent DAC (and  
the DAC outputs will change accordingly). Note that if CS/  
LDAC goes high before all 8 data bits are read in then  
incorrect data will be loaded into the DACs. All bits on the  
DATA line are read in on each rising edge of the SCLK  
signal.  
The COM Driver section of the ADM8840 uses a serial  
interface to input data and transfer it into the DACs. Figure  
3ꢀ belowꢀ shows the operation of the serial interface. The data  
is transmitted along the serial DATA lineꢀ along with a serial  
clock signalꢀ SCLK. This data is read into a Shift Register.  
When the 8 bits are sucessfully stored in the Shift Register a  
low-to-high transition on the CS/LDAC input causes the  
latch to load the 8-bits of data into the relevent DAC.  
This function is also shown in the waveforms in Figure 4  
below. A falling edge on the CS/LDAC input initiates the  
data read into the shift register. The first bit of the datastream  
is the DAC Select Bit (DAC_SEL) which determines which  
internal DAC the data will be written to. A ‘1’ selects DAC  
1 which sets the Amplitude of the output and a ‘0’ selects  
When the ADM8840 comes out of shutdown the DACs  
are preset with default values generating a COM_OUT  
Amplitude of 6V with a Centre voltage of 1.5V.  
8 DATABITS  
DATA  
DAC 1  
LATCH  
SHIFT  
REGISTER  
DAC 1 OUT  
DAC 1  
(AMPLITUDE)  
SCLK  
DAC_SEL BIT  
DAC 2  
LATCH  
DAC 2 OUT  
DAC 2  
DAC  
SELECT  
(CENTRE VOLTAGE)  
CS/LDAC  
Figure 3. Serial Interface Diagram  
t4  
t1  
t3  
t2  
CS / LDAC  
SCLK  
DATA  
DAC  
SEL  
D0  
D1  
D2  
D3  
D4  
D5  
D6  
D7  
t7  
t6  
t5  
Figure 4. Serial Interface Waveforms  
REV. PrG 2/03  
7–  

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