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Guerrilla RF GRF6412 Digital Variable Gain Amplifier (DVGA)

Guerrilla RF GRF6412 Digital Variable Gain Amplifier (DVGA) is a SPI-controlled, 31.75dB range amplifier that provides precise stepping in 0.25dB increments. This amplifier uses a serial interface that utilizes three externally defined address bits, allowing up to 8 unique devices to share a common SPI bus. Additionally, the GRF6412 includes a special Rapid Fire™ selection pin that allows the device to be switched to a predefined attenuation state immediately. This gain amplifier’s CLK, SI, LE, RFA, and ID pins include weak pull‑up resistors that bias the signals to approximately 2.5V. The GRF6412 DVGA is ideal for wireless infrastructure,  automotive cellular and V2X compensators, and high-performance gain trim and AGC loops.

Features

  • 31.75dB range with 0.25dB steps via 7-bit control
  • Serial interface with support for 8 addresses
  • Programmable Rapid Fire™ attenuation setting, which circumvents delays associated with SPI programming
  • Glitchless stepping (<2dB over/undershoot)
  • DSA supports bi-directional RF use
  • 3.3V and 5V supply voltages
  • 50Ω single-ended input and output impedances
  • -40°C to 115°C operating temperature range
  • Compact 4mm x 4mm QFN-24 package

Applications

  • Wireless infrastructure
  • Automotive cellular and V2X compensators
  • High-performance gain trim and AGC loops

Specifications

  • 5V / 2GHz / DSA+AMP cascade / Max G reference:
    • 19.8dB gain
    • 2.6dB noise figure
    • 22.5dBm OP1dB
    • 37dBm OIP3
    • 0.04dB INL attenuation error
    • 0.05dB DNL attenuation error
  • 5V / 2GHz / AMP+DSA cascade / Max G reference:
    • 19.2dB gain
    • 1.8dB noise figure
    • 21.7dBm OP1dB
    • 35.7dBm OIP3
    • 0.04dB INL attenuation error
    • 0.05dB DNL attenuation error

Block Diagram

Block Diagram - Guerrilla RF GRF6412 Digital Variable Gain Amplifier (DVGA)
發佈日期: 2026-03-04 | 更新日期: 2026-03-09