Guerrilla RF GRF6411 Step Digital Variable Gain Amplifier (VGA)
Guerrilla RF GRF6411 Step Digital Variable Gain Amplifier (VGA) is a SPI-controlled, 31.75dB range amplifier that provides precise stepping in 0.25dB increments. This amplifier includes a special Rapid Fire™ selection pin, which allows the device to be immediately switched into a predefined attenuation state. The GRF6411 digital VGA supports a 50MHz to 8GHz frequency range while still maintaining flat gain and precise, monotonic gain stepping. This amplifier minimizes the glitching to < 2dB for all steps. The GRF6411 digital VGA is available in a compact 3mm x 3mm QFN-16 package. Typical applications include wireless infrastructure, automotive cellular and V2X compensators, high-performance gain trim, and AGC loops.
Features
- 31.75dB range with 0.25dB steps via 7-bit control
- 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
- Serial interface with support for 8 addresses
- -40°C to 115°C operating temperature range
- Compact 3mm x 3mm QFN-16 package
Applications
- Wireless infrastructure
- Automotive cellular and V2X compensators
- High-performance gain trim and AGC loops
Block Diagram
Published: 2026-03-12
| Updated: 2026-04-14