SBOA442 March   2021 TMP107 , TMP107-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2CAN and RS-485 Physical Layers
  4. 3TMP107-Q1 Over the CAN Bus
  5. 4TMP107-Q1 Over the RS-485 Bus
  6. 5Test Setup
  7. 6Test Results
  8. 7Conclusion
  9. 8References

TMP107-Q1 Over the RS-485 Bus

Figure 4-1 shows the implementation with the RS-485 transceiver. The transceiver features complementary enable signals for the transmitter and the receiver. This integrated functionality replaces the SN74LVC2G241 buffer from the CAN-based circuit. For this reason, the DIR signal from the TLC555-Q1 timer connects directly to the DE and ~RE signals.

GUID-20201217-CA0I-HPWR-6R6V-RWZ3TT7N2L5C-low.gifFigure 4-1 Simplified Circuit Diagram for Interfacing the TMP107-Q1 Over the RS-485 bus

Figure 4-2 represents ideal waveforms for the circuit with the RS-485 transceiver.

GUID-20201217-CA0I-DBBH-9X7N-NPPMPZ9T4Q7B-low.gifFigure 4-2 Ideal Waveforms for the RS-485 to SMAART wire™ Interface Converter Circuit
(Example Only)