• ADM7151

    Hi there.

    I need an information about ADM7151 ESD classification (or ESD HBM/CDM levels).

    Can you help me?

  • ADM7151

    Hello,

    I'm interested in your ADM7151 because of it's low noise and hi frequency PSSR, but I need a 2.0 amp output @7.8 volts. Is it possible to parallel devices to obtain higher output current? Any other suggestions on how to increase the output current…

  • ADM7151 self excited

    I used ADM7151 for PLL+VCO power supply ,If the load 400mA current ,then the VCO output will uperimposed spur,if don't use ADM7151, the output is correct.,attachment are ADM7151 circuit diagrams and test phenomena ,so I want to know why ?

  • ADM7151 oscillation

    Hi,

    I'm using the ADM7151 to supply a PLL/VCO.  It is to be supplied w/ 5V input and give 3.3V output.  See my schematic below.  However the output is actually going to ~4V @ Vin=4.5V, and 4.3V @ Vin=5V.  It's also oscillating badly.  I noticed that…

  • RE: ADM7151 two in  series

    Hi Leon77,

    Cascading two ADM7151 will only preserve the output noise performance of the device. What the cascaded LDOs will improve is the PSRR performance.

    Best Regards,

    Alex

  • RE: ADF5355 spur issue

    Hi Viktor,

    I shifted the LO frequency around 470KHz, as below picture, the A-spur still existed and appeared another spur.

    LDO we use ADM7151 and the capacitors are C0G type.

    If we try to modify PCB layout, which traces should be taken care first??

  • 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: About the exposed pad connection

    Hi Wangkes,

    The reason why you are not seeing a hard short between VIN and EPAD is because the conductive material between the EPAD and substrate is not really low impedance. For proper operation of the ADP7182, the EPAD must be connected to VIN.

    One of…

  • How close to drop out voltage can one operate an LDO in order to squeeze the last ounce out of my circuits efficiency? (1)

    How close to drop out voltage can one operate an LDO in order to squeeze the
    last ounce out of my circuits efficiency?

     

    The minimum headroom required is highly dependent on the LDO characteristics,
    load current, and the use case.  For…
  • How is the RMS output noise of an ultra-low noise LDO measured?

    How is the RMS output noise of an ultra-low noise LDO measured?

     

    The noise test measurement system allows the user to integrate the noise
    spectral density data over the desired bandwidth to calculate the RMS noise.