• Powering OP choices

    Now I am designing a 16-bits A to D PCI-E card, I plan to use ADA4817 (1st stage), ADA4938 (2nd stage, ADC driver), AD9650 (ADC, 16 bits, 80M).

    For powering OP, I need +/- 5V.

    Before I did it with linear regulation, then I notice ADI application note…

  • RE: 开关电源纹波问题

    如果对于开关电源的外围元器件的选择感兴趣的话,您可以参考一下某些产品的数据手册,里面会给出关键元器件计算的公式,当然也包括了输出纹波和输出电容,电感和开关频率等的关系。如您可以参考一下ADP2114中第27~28页的部分。

    轻载时,纹波比较大,是由于开关器件的工作模式从CCM变成了DCM。

  • RE: Control Architectures

    Some of the legacy products (ADP182x family) use the voltage mode control. Few variants of Current mode control architecture are predominantly used in all the recently released controllers and regulators from ADI. These variants are:

    Peak current mode…

  • TAGS LIST: Power Management

    LTM8045
    LTM8049
    LTM4651
    LTM4661
    LTM4686
    LTM4676
    LTM4686-1
    LTM4676A
    LTM4675
    LTM4677
    LTM4678
    LTM8062
    LTM8061
    LTM8052
    LTM8026
    LTM8056
    LTM8064
    LTM8054
    LTM8055
    LTM4600
    LTM4600HV
    LTM4608A
    LTM4604A
    LTM8032
  • RE: LDO noise performance when cascaded from a buck in ADP5022

    Hi Maurizio,

    I have simulated and tested the filter circuit and yes it works better.

    The resistance helps to damp the over shoot in the transition region of the filter, I wonder can't we use a moderate ESR electrolyte that may serve both the purposes…

  • 超级实用——拥有纹波过滤美国专利的他谈开关调节器电源设计

    这篇文章版主在微信上看过N次媒体转发分享,大家有没有也被他刷过屏?

    确实是图文并茂的好文章,版主必须在论坛分享下。

    ————————————————————————————————

    最大程度降低开关调节器的输出纹波和瞬变十分重要,尤其是为高分辨率ADC之类噪声敏感型器件供电时,输出纹波在ADC输出频谱上将表现为独特的杂散。为避免降低信噪比(SNR)和无杂散动态范围(SFDR)性能,开关调节器通常以低压差调节器(LDO)代替,牺牲开关调节器的高效率,换取更干净的LDO输出。了解这些伪像可让你成功将开关调节器集成到更多的高性能…

  • RE: 超声成像

     PDF

    ADI提供了相关解决方案,具体请看附件。

  • AD9523怎么利用SPIController配置时钟

    AD9643, AD9613, AD6649, or AD6643 Family Evaluation Board and HSC-ADC-EVALCZ Data Capture Board的内部时钟AD9523怎么利用SPI Controller配置产生250MSPS的采样率

  • Magnetic Compatible LNA

    Hello,

    I am working on the RF receiving coil of MRI scanner, and a magnetic compatible low noise amplifier is required to work as pre-amplifier inside the magnetic body. The magnetic field could be 1.5T or maybe up to 7T. I noticed that ADI has a document…

  • RE: AD9781 power supply

    The most sensitve supply if CVDD18. On our latest eval board we use the  ADP2114   synchronous step-down, switching regulator and derive all supplies from this regulator with separate routing and decoupling. We do not have power supply ripple rejection specs…