900MHz Lowest noise, Ultra-High-speed OPAMP

Discussion in 'General Electronics Chat' started by retched, May 17, 2010.

  1. retched

    Thread Starter AAC Fanatic!

    Dec 5, 2009
    An opamp with 900Mhz at a gain of 10. It is pretty amazing. Gets within .8v of either rail and only needs 15mA from 2.7 to 5.5.

    It is just amazing what is being produced. It has internal gain select of 4 or 10 on a single pin (high or low) and internal compensation.

    In and out. nice and easy, and so fast. I dont know how many times I read about these advances, they are still dumbfounding me.

    Im gonna have a hard time dealing with these 3mm x 3mm x.8mm LLP packages.

    I guess the "barely there" leads help with the low distortion and noise also.

    Needless to say, not breadboard friendly.

  2. mik3

    Senior Member

    Feb 4, 2008
    The small package reduces the parasitic inductance/capacitance of the pins and this allows for higher operating frequencies. However, if a bad PCB layout is designed, this reduction in parasitics will be lost and affect the performance of the circuit. Also, even it was breadboard friendly, it could not be used on a bread board at such high frequency due to the high parasitics a bread board has.
    Last edited: May 18, 2010
  3. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    When working with the similar LMH6609, I found the following article titled, "Working with Cranky Op-Amps" useful. See: http://tangentsoft.net/audio/hs-opamp.html

    Note the input bias current of 15 uA compared to other op-amps with input bias currents of 100 nA or so. The article cited addresses that design issue specifically.