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LMH1218 VDD decoupling capacitor

Toshi
Expert 1780 points
Other Parts Discussed in Thread: LMH1218EVMHi, TI I'd like to confirm the decoupling capacitor value. The datasheet(SNLS474A –FEBRUARY 2015–REVISED MARCH 2015) recommended 0.01uF X 2 for VDD, but the LMH1218EVM(snlu173a) using 0.1uF X 2 . Which do you recommend 0.01uF or 01uF for VDD decoupling capacitor ?
  • 0
    TI__Guru* 93670 points
    Kobayashi-San,

    You can use 0.1 or 0.01uF Capacitor. This attenuates the high frequency noise. Based on PCB noise, you could decide whether you need to use 0.1 or 0.01uF Capacitor but either one should work. Please make sure you also use a high Capacitor value, 1 or 10uF Capacitor in parallel with 0.1 or 0.01 uF as well to attenuate the higher frequency noise.

    Regards,,nasser