Power Amplifier

SCT3604

Broadband High Efficiency RF Power Amplifier

130 MHz – 1 GHz broadband RF power amplifier: up to 38 dB gain, up to 34 dBm output power, 55% power added efficiency.

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SCT3604 is a high-gain, high-efficiency power amplifier for wideband CW or FM signal amplification from 130 MHz to 1 GHz, aimed particularly at VHF and UHF two-way radios, RFID and other FM, FSK and ASK applications. The chip is built on a silicon process; input and output matching is implemented on the PCB and can be adjusted easily for optimum power and efficiency. It comes in a low thermal resistance 5 × 5 mm QFN28 package.

Key features

  • Broadband RF amplification
    • 130 MHz – 1 GHz operating range
    • For CW and FM signal amplification
    • Input and output matching on the PCB, adjustable per band for optimum power and efficiency
  • Power and efficiency
    • Up to 38 dB power gain
    • Up to 34 dBm output power (4.2 V supply, -5 dBm input)
    • 55% power added efficiency (2.5 W output, 4.2 V, 150 MHz)
  • Spectral purity
    • At maximum output: second harmonic -30 dBc, third -45 dBc, fourth -60 dBc
    • Non-harmonic spurious -60 dBc
    • -70 dBc ACPR with a narrowband FM signal
  • Supply and bias
    • Single 2.5 – 6 V supply
    • 0 – 2.0 V bias control voltage
    • 1.2 A supply current at 34 dBm output (4.2 V)
  • Package and operating conditions
    • 5 × 5 mm QFN28 on 0.5 mm pitch, low thermal resistance
    • -40 to +85 °C operating range
    • Silicon process, 60 dB forward isolation

Typical applications

  • VHF / UHF two-way radios
  • Digital conventional and trunking radios (DMR / dPMR / P25 / NXDN)
  • RFID readers and writers
  • Wireless data communication equipment