msgeq7 circuits

Discussion in 'General Electronics Chat' started by RRITESH KAKKAR, Feb 25, 2015.

  1. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Hello,
    I have seen data sheet of it what does three pin mean here?

    tr - Reset Pulse Width 100 nS min
    trs - Reset to Strobe Delay 72 uS min
    ts - Strobe Pulse Width 18 uS min
    tss - Strobe to Strobe Delay 72 uS min
    to - Output Settling Time 36 uS min (with Cload = 22 pF and Rload = 1 Mohm)

    RESET

    STROBE

    clk

    MSGEQ7
     
    Last edited: Feb 26, 2015
  2. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    From what datasheet does the information come from?
    Is there no timing diagram given in that datasheet?

    Bertus
     
    RRITESH KAKKAR likes this.
  3. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    From the datasheet:

    STROBE - Channel selection pin
    RESET - resets multiplexer
    CLKIN - clock oscillator pin

    A pulse on the reset pin must be wider than 100ns.
    The time between RESET goes low and STROBE must be, at least, 72us.
    A pulse on STROBE must be wider than 18us.
    There must be 72us between each pulse on STROBE.
    The time it takes for the output to settle to a valid state is 36us.

    That funny looking thing with squiggly lines (above where those numbers are listed) is called a timing diagram. This timing diagram shows what those signals mean in relation to the input signals.
     
  4. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Hi,
    it is MSGEQ7 the output of it i.e. Dc is feed to LM3914 ?
    I have not used it in any of project. so, is that DC value Changes with freq response of Band.
    and the LM3914 display digital on LEDs?
    Actually, this project is meant for DJ or sound system back stage do you want to give any suggestion?
     
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