The RS485FLDPLXDRCEVM is an EVM from TI that allows quick prototyping of our Full Duplex RS-485 Transceivers in a DRC package. The board allows for testing of single and differential ended communication with potential modifications such as changing the termination resistance or adding a common mode bias to the bus to simulate ground potential differences that can be seen in systems with long cables that share a ground line with high current capacity. The board comes preinstalled with a THVD2412DRCR which allows full duplex communication at up to 250kbps powered by a 3 V to 5.5V power connection on VCC. The board also supports testing of systems with separate EARTH planes separate from the device ground reference plane.
Footprint for 10-Pin VSON (DRC) Full Duplex RS-485 Transceivers Indicated as U1
THVD2412DRC Installed as U1 by Default
Power Supply Terminals allow for Power, Board-Ground, and Earth Connections.
Bulk Power Supply Coupling Capacitors installed (2, 47uF and 2, 10uF caps) with two between VCC and GND with the other two between GND and EARTH.
Ground Current Limiting Resistor Pad (R14) Available Between Board Ground and Earth on J5
Common Mode Voltage Connections (J6, J7, J8, J15, J16, and J17) Available to Add a Common Mode Voltage to the RS-485 Differential Bus (Pins A and B or Pins Y and Z)