RF Design
The VXSDR 20-160 and VXSDR 20-600 designs' components are shown below. The designs are very similar, and have
almost identical performance except for the difference in sample rate.
VXSDR 20-160
Transmit Chain
Texas Instruments DAC37J82 16-bit 1.6 GSPS DAC (8x interpolating at 1280 MSPS)
Butterworth image filter
Marki Microwave MMIQ-0520HSM IQ upconverter from IF I&Q
Mini-Circuits AVA-24A+ RF amplifier
Qorvo TGL2223-SM digital attenuator
Analog Devices HMC451LC3 RF amplifier
Field-replaceable SMA connector
Receive Chain
Field-replaceable SMA connector
Qorvo TGA2227-SM GaN LNA
Qorvo TGL2223-SM digital attenuator
Marki Microwave MMIQ-0520HSM IQ downconverter to IF I&Q
Mini-Circuits LHA13-LN+ IF amplifiers
Cauer (elliptic) alias filters
Texas Instruments LMH6521 ADC driver
Texas Instruments ADC32J45 14-bit 160 MSPS ADC
Clocking
10 MHz reference input
Crystek CVHD-950 low phase noise VCXO
Texas Instruments LMK04828 clock generator (dual-PLL mode w/VCXO)
Local Oscillators
Texas Instruments LMX2594 synthesizer
Analog Devices HMC814LC3 active doubler (15-22 GHz)
Mini-Circuits AVA-24A+ mixer driver (5-22 GHz)
VXSDR 20-600
Transmit Chain
Texas Instruments DAC38J82 16-bit 2.5 GSPS DAC (4x interpolating at 2400 MSPS)
Butterworth image filter
Marki Microwave MMIQ-0520HSM IQ upconverter from IF I&Q
Mini-Circuits AVA-24A+ RF amplifier
Qorvo TGL2223-SM digital attenuator
Analog Devices HMC451LC3 RF amplifier
Field-replaceable SMA connector
Receive Chain
Field-replaceable SMA connector
Qorvo TGA2227-SM GaN LNA
Qorvo TGL2223-SM digital attenuator
Marki Microwave MMIQ-0520HSM IQ downconverter to IF I&Q
Mini-Circuits LHA23-LN+ IF amplifiers
Cauer (elliptic) alias filters
Texas Instruments LMH6401 ADC driver
Analog Devices AD9695 14-bit 600 MSPS ADC
Clocking
10 MHz reference input
Crystek CVHD-950 low phase noise VCXO
Texas Instruments LMK04828 clock generator (dual-PLL mode w/VCXO)
Local Oscillators
Texas Instruments LMX2594 synthesizer
Analog Devices HMC814LC3 active doubler (15-22 GHz)
Mini-Circuits AVA-24A+ mixer driver (5-22 GHz)