USB Galvanic Digital Isolator for SDR radios
The USB Galvanic Digital Isolator for SDR radios is designed to break
the galvanic connection between USB host PC and the attached SDR
radio peripheral avoiding that whatever power and ground noise from
the PC side do not influence the sensible radio on the other side.
The resultant galvanic isolation improves common-mode voltage,
prevents ground loops, a common cause of interference and data
distortion issues, improves reception, as the noise floor in the receiver
is lowered, and removes spikes and birdies on the PC panoramic
screen. In addition provides isolation of 1000V AC between the host PC
and the radio peripheral that guard against surges that may come from
the antenna connected to the receiver.
The USB Galvanic Digital Isolator for SDR radios is based on ADuM 4160
Full/Low Speed 5 kV USB Digital Isolator and ADuM 5000 Isolated DC-to-DC Converter both from Analog Devices combining high speed CMOS and chip-scale air transformer iCoupler technology.
The USB Galvanic Digital Isolator complies with specifications USB 1.1,
Low speed (1.5Mbps) and USB 2.0 Full Speed (12Mbps). The speed
mode is set manually via two jumpers inside (default full speed). Most
of the time it is not necessary change between modes but if automatic
speed detection is desired, an external hub can be connected to the peripheral side configured for full speed.
The USB Galvanic Digital Isolator is self powered from the host PC through the USB cable. An embedded DC/DC converter provides a galvanic isolated voltage of 5VDC/100mA to the peripheral side. It includes additionally ESD,EMC protection of the data lines and power transient short-circuit guard.
It is highly advisable not to power any part of the connected radio from the USB bus, instead an external dedicated power supply must be used.
The USB Galvanic Digital Isolator behaves like an USB cable, no USB drivers are needed. It works on all operating systems, Mac, Windows,Linux, etc.
No suitable for High Speed USB mode devices
Isolation 1.000 Volt AC
Protection: EMC, ESD, Overvoltage Surge, Short-circuits.
PC side: From USB cable, 5VDC. Attached signaling LED.
- Drawn power from peripheral radio max: Through USB cable, 5V DC/100mA max.
USB modes: Full speed (12 Mbps) Low speed (1.5 MBps). Switchable.
Standard socket connectors: PC side: USB type B, peripheral side: USB type A.
Dimensions 67 mm x 66 mm x 28 mm.(2.638x2.598x 1.102inch)
USB 2.0 pair of cables included.
Type A USB socket
USB Galvanic Digital Isolator manual(web)