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LMH6702: amplification ratio to 1/10(Av)?

Rice,Lee
Intellectual 340 points
Part Number: LMH6702
Other Parts Discussed in Thread: THS4304, OPA695, , LMH6703

Tool/software:

What would be a suitable opamp to use to reduce the amplification ratio to 1/10(Av)?

I want change Input(Vp-p: 1.0V) -->Output( Vp-p: 150mV). 

  • 0
    TI__Mastermind 28785 points

    Hello Rice,

      Our unity-gain stable voltage feedback amplifiers are capable of attenuation (gains lower than 1V/V)

      Do you have any other design requirements such as:

    1. Voltage supplies 
    2. Bandwidth 
    3. Loading/driving capabilities 
    4. Application type: determine if need FET or bipolar input. FET input will have less current noise/bias current while bipolar will have less offset voltage. This is important if resistor values need to be high for impedance/loading or power dissipation.

    Thank you,

    Sima

  • 0 in reply to Sima Jalaleddine
    Intellectual 340 points

    1. +5~ -5 Volt 

    2. BW : 1.5GHz

    3. 10mA < driving

    4. unipolar  input - unipolar output / offset 1.17V Vamp=120mV

  • 0 in reply to Rice,Lee
    TI__Mastermind 28785 points

    Hello Rice,

      I apologize for the long delay here.

      If you first requirement on supplies is flexible. I would recommend THS4304 which will be capable of 1/10 attenuation + your 2,3,4 requirement.

      Otherwise, another option would be to divide down your signal prior, then use a current-feedback amplifier such as the one linked LMH6702, LMH6703 or OPA695  at unity gain.

    Thank you,
    Sima