GRF6412

GRF6412 is a Guerrilla RF digital variable-gain amplifier (DVGA) in a QFN-24 4 x 4 mm package — a 0.25 dB-step gain block covering 50 MHz to 8 GHz for infrastructure radios, repeaters and test equipment, with 31.75 dB of gain range, 19.8 dB small-signal gain, 2.6 dB noise figure and 37 dBm OIP3 under SPI control. Guerrilla RF publishes the part with a RELEASE-version datasheet and a direct Buy Now listing, and it carries no pre-production marker in the vendor's new-products list. Selection advice: the fine 0.25 dB step size makes this part a fit for closed-loop level control and channel-power calibration, where a coarse attenuator would dither the loop; when you only need fixed gain, a simpler gain block is the cheaper socket. Verify gain flatness and OIP3 at your exact band edges from the datasheet plots — wideband DVGA performance toward 8 GHz is layout-sensitive, so follow the evaluation-board stack-up and grounding closely. Parameters verified against Guerrilla RF documentation.