• ADSP 21369 Core Voltage becoming zero

    Hello All,

    In one of our project we are using ADSP 21369 and generating 3.3V and 1.2V supply using ADP1864. At the output of ADP1864 i have added 0E resistor to isolate the power section and ADSP.

    Firstly i have verified both the supply voltage output…

  • ADIsimPower Design Tools Download

    IC                  Design Tool                                                                    Download Tool  URL

    LDOs            ADI Linear Regulator Design Tool and Parametric Search  http://download.analog.com/PMP/ADI_LinearRegulators.zip

    ADP1612     ADP161x Boost Regulator Design Tool http://download.analog.com/PMP/ADP161x_BoostDesigner.zip

  • RE: Power supply for BF609 EZ-board

    As Greg mentioned most of the diodes are just protection diodes. D1, D2, D3, D4, D5, D7, D8 , they are not needed for the functionality of the power supplies. I think they have been placed there in case someone accidentally shorts things out while probing…

  • Obsolete SI7601 in power section of ADSP-21489 EZ-Board

    ADSP-21489 EZ-Board has a power section using ADP1864 and SI7601.  SI7601 is obsolete, can you suggest a replacement part?  I'm designing my own board and using this schematics as reference.

    Perharps TPS54325 could replace both.


  • ADSP-21489 Power Sequence Schematic

    Hi All,
    I want to know how to design the ADSP-21489 Power Circuit simply,
    and I want to know why the Time Delay device(ADM1085) is needed in the VDDINT circuit.

    The DSP has a specific power-up sequence like as below.
    - Power Up Sequencing Timing Requir…

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  • RE: Re: ADSP-21489 1.1V and 3.3V switching regulator options

    Hi LucaV,

    The reason I take ADP1864 and the power sequencing control as a design reference is that its function and performance have been proven in ADSP-2148x EZ board. It is the first time for me to use switching regulator in PCB design. Because of…

  • Powering AD8652 with Synchronous buck controller_Filter recommended


    I am using AD8652 for my audio application.The power supply for the Opamp is from Synchronous buck controller 12-15V dc input to 5V output.Since the Op-amp has Low PSRR at >300K.Is there any recommended  filter circuits for powering the Op-amps…

  • RE: ADSP-21489 1.1V and 3.3V switching regulator options

    Hello Mitesh

    Thanks for your reply.

    What I was thinking was to only apply the 12Volt to Vin of the ADP1864. All other voltages would remain the same as per eval board schematic.



  • ADSP-21489 Power-Up Sequencing


    Does anyone experienced with Power Up Sequence for ADSP-21489?

    I mean i try to look for any order which the two input power (VDDint and VDD ext) must be turn on.

    In the ADSP-21489 Data Sheet p.23 there is a timing recommendation for the start-up…