CATV Infrastructure Amplifier 1.2 GHz CCAP/Edge QAM/CMTS Driver

The ACA1240 is a GaAs based amplifier that contains highly linear amplification and attenuation stages for use in CATV CCAP/EQAM/CMTS modulators and networks. It incorporates a continuously adjustable linear attenuator that is controlled by an external analog voltage. This glitch-free attenuator provides a minimum of 20 dB of continuously variable attenuation and is preceded by a high-linearity pre-amplifier and followed by a high-gain output driver. Both input and output are matched to 75 Ω using balun transformers.

The ACA1240 operates from a single 12 V supply and is offered in an 11 mm x 11 mm surface-mount package.

Please note: ACA1240 is being discontinued and is not recommended for new designs.


    • 35 dB gain
    • Meets DRFI specification +5 dB margin
    • High-linearity, high-gain integrated amplifier with an adjustable linear attenuator
    • Balanced inputs and outputs matched for a 75 Ω system
    • 0 to 20 dB continuously adjustable attenuation using an external analog control signal
    • Single 12 V supply with 6 W power consumption
    • High-linearity GaAs process

Images & Diagrams


    • Description
    • 1.2 GHz CCAP/Edge QAM/CMTS Driver
    • Gain (dB) Min
    • 35
    • Gain (dB) Max
    • 35
    • Supply Current Typ. (mA)
    • 500
    • Noise Figure Typ. (dB)
    • 4.5
    • CTB (dBc) Typ
    • CSO (dBc) Typ
    • XMOD (dBc) Typ

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