Guerrilla RF GRF6402W Digital Step Attenuator

Guerrilla RF GRF6402W Digital Step Attenuator (DSA) is an SPI-controlled, bi-directional, 31.75dB range device that provides precise stepping in 0.25dB increments. The device’s serial interface utilizes three externally defined address bits, allowing up to eight unique devices to share a common SPI bus. In addition to supporting traditional serial programming, the GRF6402W also includes a unique Rapid Fire™ selection pin that allows the device to be immediately switched into a pre-defined attenuation state.

The GRF6402W covers the entire 50MHz to 6GHz range while still maintaining precise and monotonic gain stepping. Glitching has been minimized to <2dB for all steps. The device delivers up to 30.5dBm of IP0.1dB, 56.2dBm of IIP3, and a low IL of less than 1.3dB at 2GHz. The compact 3mm x 3mm QFN-16 packaged GRF6402W operates within a -40°C to +105°C temperature range.

Features

31.75dB Range
0.25dB Steps via 7-bit control
Serial interface with support for 8x addresses
Programmable Rapid Fire™ attenuation setting, which circumvents delays associated with SPI programming
Defaults to full attenuation for power-on resets
Glitchless stepping (<2dB over/undershoot)
47ns settling time for 0.25dB steps

Bi-directional RF use
3.3V and 5V Supply voltages
50Ω Single-ended I/O impedances
-40°C to +105°C Operating temperature range
Compact 3mm x 3mm QFN-16 package
AEC-Q100 Grade 2 qualification pending
100% Device reflow at assembly
100% Optical die inspection

Applications

5G wireless infrastructures
Cellular repeaters/boosters and DAS systems
Automotive cellular and V2X compensators
Millimeter wave IF stages

High-performance gain trim and AGC loops
TDD applications where a common DSA is shared for both TX and RX modes of operation

Guerrilla RF GRF6402W Digital Step Attenuator

Features

Applications

Block Diagram

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