• adp3338

    有一片型号为ADP3338 LDO,固定输出为3.3V,不上电点阻抗发现输入5V和输出3.3V对地都是300Ω左右,输入输出管脚之间阻抗只有6Ω,正常芯片有1.5K左右,关键是上电后芯片输出输入电压正常,不知道什么原因,求解惑。

  • ADP3338-5 dropout voltage

    Hi,ADI Expert

    I use the low cost LDO adp3338-5 as the digital power regulator for my design.but now i am confused with the one of its features.I quoted the feature here-- 'Ultralow dropout voltage: 190 mV (typ) @ 1 A'.In my design,i supply adp3338-5…

  • ADP3338: Thermal and overcurrent protections

    I´m using the ADP3338 LDO, and I´d like to clarify a question regarding thermal
    manegement.
    From my point of view the bigger the termal cooling area on the PCB the better
    (even in the LDO does not have to dissipate many power).
    Imagine…
  • ADP3338 - 5V output with 0V input

    I'm designing a system for a car with two use cases. In normal operation, the system is powered by the 12V car battery, which is regulated to 5.6V by a buck-boost regulator and then to 5V by the ADP3338. When the system is outside of the car, however…

  • RE: ADV7341 I2C


    Hi Amnon,

    You replaced the ferrite beads with wire it improved matters. Instead of the wire, could you try connecting in an external bench power supply to see if that resolves your issue altogether? I have attached the BOM which includes the details…

  • RE: 开关电源纹波问题

    那么影响最大的是ESR?其他因素随温度怎么变化呢?

    目前,我用的主要是LDO ADP124、ADP125、ADP3338,没有找到ADI产品中合适的DCDC

  • RE: Recommended 1.8V regulator for 8 DDS chips


    Hi Prakash BJ,

    The AVDD and DVDD supply pins of the AD9959 draws a maximum of 325mA when all channels are turned on.

    The 800mA maximum output current of the ADM7160 can only supply up to two DDS chips.

    There are higher current output LDOs such as the…

  • RE: ADSP-21992 Booting Problem

    Hi!

    So, I tried to use a quick power supply (100 us startup time, 2x ADP3338 - the same, as on the ADI's Starter Kit) and the problem still remains. There is no change whether both the voltages are switched on simultaneously, VDD_EXT first and then VDD_INT…

  • [征文]+[转载]AD9910,双路DDS同步设计及FPGA配置SPI接口的VHDL代码分享

    [征文]+[转载]AD9910,双路DDS同步设计及FPGA配置SPI接口的VHDL代码分享

    根据实际应用需求,参考CN0121实验室的电路,制定系统实施方案。系统采用FPGA负责接口和通信控制,2ADCLK846负责参考时钟和同步时钟的缓冲和分发,ADP3338负责DDS数字和模拟电源供电。系统构成框图如下所示。

    为了保证两片AD9910之间严格同步,应关闭内部PLL电路,直接使用外部参考时钟作为系统时钟;同时在布局布线时,应尽量满足对称性,使时钟分…

  • AD9235信噪比改进的方案

    我们在设计中使用了AD9235采样率40M,12bit的AD芯片,在实验板上输入固定为21.4M,测试AD9235的信噪比在40db左右,离AD官方测试板的指标和12bitAD能够达到的理论信噪比还有较大的距离,设计要求信噪比达到60db,因此针对我们实验板的AD周边电路存在的问题进行了改进。       

    实验板处于系统原理实验阶段,在很多地方都存在不足之处,原理图和PCB如下图所示,对AD信噪比有影响的具体有以下几个部分:

    1.

    AD9235和前端驱动AD8351的电源来自于FPGA的3.3VIO供电…