Isolated RS485/RS422 Transceiver with Integrated DC-DC Converter
The product presented here is a galvanically isolated differential line transceiver with a built-in isolated DC-DC converter for TIA/EIA RS-485 and RS-422 applications. Both signal and power paths are isolated per UL1577 and are qualified for reinforced isolation per VDE, CSA, and CQC. The low-emissions, isolated DC/DC converter ensures the final system is capable of meeting CISPR 32 radiated emissions limit lines with just two ferrites’ beads. The project is ideal for long-distance communications. Isolation breaks the ground loop between the communicating nodes, allowing for a much larger common-mode voltage range.
The project supports a maximum data rate of 12 Mbps. It can operate from a single supply voltage of 3V to 5.5V by connecting VC and 5V on PCB. If lower logic levels are required, these devices support a 1.71V to 5.5V logic supply (VIO) that can be independent from the power converter supply (VDD) of 3V to 5.5V.
Features
- Power Supply Logic 1.71 V to 5.5V DC
- Power Converter Supply 3V to 5.5V
- For Single Supply Operation Supply Input Range 3V to 5.5V (Combined DC-DC Input and Logic Power Input)
- Power Converter Output Isolated (Output) Side 3.3V (Can be Changed to 5V)
- Integrated low-emissions DC-DC converter with low-emissions, low-noise
- RS-485 with PROFIBUS Compatibility – Open, Short, and Idle Bus Failsafe
- 1/8 Unit Load: Up to 256 Nodes on Bus
- Project Supports Full-Duplex, It Can also Be Used for Half-Duplex
- Glitch-free Power Up Down
- Current Limit and Thermal Shutdown
- 4 x 3 mm Mounting Holes
- PCB Dimensions 56.04 x 31.12 mm
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The product presented here is a galvanically isolated differential line transceiver with a built-in isolated DC-DC converter for TIA/EIA RS-485 and RS-422 applications. Both signal and power paths are isolated per UL1577 and are qualified for reinforced isolation per VDE, CSA, and CQC. The low-emissions, isolated DC/DC converter ensures the final system is capable of meeting CISPR 32 radiated emissions limit lines with just two ferrites’ beads. The project is ideal for long-distance communications. Isolation breaks the ground loop between the communicating nodes, allowing for a much larger common-mode voltage range.
The project supports a maximum data rate of 12 Mbps. It can operate from a single supply voltage of 3V to 5.5V by connecting VC and 5V on PCB. If lower logic levels are required, these devices support a 1.71V to 5.5V logic supply (VIO) that can be independent from the power converter supply (VDD) of 3V to 5.5V.
Features
- Power Supply Logic 1.71 V to 5.5V DC
- Power Converter Supply 3V to 5.5V
- For Single Supply Operation Supply Input Range 3V to 5.5V (Combined DC-DC Input and Logic Power Input)
- Power Converter Output Isolated (Output) Side 3.3V (Can be Changed to 5V)
- Integrated low-emissions DC-DC converter with low-emissions, low-noise
- RS-485 with PROFIBUS Compatibility – Open, Short, and Idle Bus Failsafe
- 1/8 Unit Load: Up to 256 Nodes on Bus
- Project Supports Full-Duplex, It Can also Be Used for Half-Duplex
- Glitch-free Power Up Down
- Current Limit and Thermal Shutdown
- 4 x 3 mm Mounting Holes
- PCB Dimensions 56.04 x 31.12 mm
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