SLVAF72 September   2021 TPS2661

 

  1.   Trademarks
  2. 1Overview of a HART Enabled Analog Input Module
  3. 2Protection Provided by TPS2661 to Analog Input Module
    1. 2.1 Overload Protection
    2. 2.2 Output Hot Short and Input Hot Plug
    3. 2.3 Miswiring on Input
    4. 2.4 Input Under Voltage Protection
  4. 3Protection Provided by TPS2661 to Analog Output Module (AOM)
    1. 3.1 Miswiring on Output
    2. 3.2 Output under voltage protection
  5. 4HART Tests Done on TPS2661x
  6. 5Challenges Using Discrete Solution Instead of TPS2661x

5 Challenges Using Discrete Solution Instead of TPS2661x

A circuit providing solution with discrete elements consist of TVS diode, Zener diodes and PTC. During a miswiring event, TVS diode provides protection from surge pulses, PTC is required for over-current protection while Back-to-Back Zener diodes are required for overvoltage protection and limiting the power dissipation in Burden Resistor. For comparison of TPS2661x with discrete solution, see Enabling Smarter, Integrated Protection for 4-20mA Current Loops with eFuses.