• AD9691 Power supply recommendations error?

    Power supply recommendation, Figure 83, in the AD9691(Rev 0) datasheet,

    3.3V Input -> ADP2164 (1.8V) -> ADP125 -> AVDD1_SR

    It is normal power supply sequence as I know.

    But in the ADP125(Rev D) datasheet,

    Input voltage supply range of ADP125…

  • ADP125 and ESR values

    Four parallel capacitor 1210-X7R-6.3V-47 uF have ESR 0.0005Ω.
    But the datasheet specifies that Capacitor ESR should be more
    0.001Ω. Can you advise.

     

    Theoretically the ESR of the multiple ceramic capacitors can get very low, even
    sub…
  • ADP125: Protection diode required?

    Hi everyone,

    I'm designing a circuit with some ADP125 LDOs for the analog supplies. In the abs. max. ratings, there is a requirement for VOUT:

    VOUT to GND | -0.3V to VIN

    This would clearly indicate that the regulator needs a reverse diode from…

  • RE: AD9371 SPI Problem

    Hi:

    The power supply diagram in above post makes me a little confused. It seems that both FMCA_VDJ and ADP125 output voltage are connected to the VDD_IF. May I ask that VDD_IF in developed board is supplied by ADP125 chip or FMCA_VDJ?  

    In our costumed…

  • RE: LDO regulators in series to provide +/- filtered power rails?

    Thanks LucaV

    I ended up using a device from Linear (LT3015EMSE) for the
    negative rail, and the ADP125 for the positive rail, thanks for the help, I was
    surprised that Analog did not have a solution, it would seem to be a natural to
    complement Analog’s core…

  • RE: ADM7151 doesn't turned off totaly. Why?

      The ADM7151 is connected correctly and you say you have a similar
    issue with the ADP125.  I am thinking that there is another power source
    that is pulling up the LDO outputs via the protection diodes or some other
    leakage path in the loads.  We need to see…

  • 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: AD9912 power supply

    Saurabh,

    In general I would point you to the ADIsimPower tool for identifying your best options

    Here are a few options for you in the meantime:

    - For the 14.8V to 5V you can use the ADP2370 or the ADP2300 (1/2/3)

    - For the LDO from 5V to 3.3V we have…

  • RE: Max-Min ripple required for ADC AD7764

    Abhijit,

    The power supply you suggested will probably give you an output voltage ripple in the 15mV-20mV range. I am not sure this is low noise enough to power the AD7764. Unfortunately we have not tested it with this level of noise on the power supply…

  • RE: AD9625 Datasheet Questions

    Hi Belenie-

    I can answer you AD9625 datasheet questions for you:

    Is the Full Scale Input fixed at 1.2Vpp or is it adjustable?

    The Full Scale input is fixed and there is not a variable adjustment.

    Does SPI_VDDIO have to be +2.5V as indicated on page…