SLVSFE3B November   2020  – May 2021 TPS2661


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Overload Protection and Fast-Trip
      2. 8.3.2 Reverse Current Blocking for Unipolar Current Inputs (4 - 20 mA, 0 - 20 mA)
      3. 8.3.3 OUTPUT/INPUT Cutoff During Over-Voltage, Under-Voltage Due to Miswiring
        1. Output Over-Voltage
        2. Output or Input Under-Voltage
      4. 8.3.4 External Power Supply(±Vs)
      5. 8.3.5 Loop Testing Without ±Vs Supply (Loop Power Mode in TPS26610 Only)
        1. Supply Sensing with VSNS For Loop Power Mode (TPS26610)
      6. 8.3.6 Enable Control (TPS26611 and TPS26612)
      7. 8.3.7 Signal Good Indicator (SGOOD)
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application: Analog Input Protection for Current Inputs with TPS26610
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure for Current Inputs with TPS26610
        1. Selecting ±Vs Supplies for TPS26610
        2. Selecting RBurden
        3. Selecting MODE Configuration for TPS26610
      3. 9.2.3 Application Performance Plots for Current Inputs with TPS26610
    3. 9.3 Typical Application: Analog Input Protection for Multiplexed Current and Voltage Inputs with TPS26611
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure for Analog Input Protection for Multiplexed Current and Voltage Inputs with TPS26611
        1. Selecting ±Vs Supplies for TPS26611
        2. Selecting MODE Configuration for TPS26611
        3. Selecting Bias Resistors R1, R2 for Setting Common Mode Voltage for Voltage Inputs
      3. 9.3.3 Application Performance Plots for V/I Inputs with TPS26611
    4. 9.4 System Examples
      1. 9.4.1 Power Supply Protection of 2-Wire Transmitter with TPS26612
      2. 9.4.2 Protection of 3-Wire Transmitters and Analog Output Modules with TPS26611/12
      3. 9.4.3 UART IO Protection with TPS26611/12
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Application Information

The TPS2661x is an industrial current loop protector, providing a robust signal line protection in a wide range of indutrial and automations systems. It is suitable for protection of all kinds of current loops like the 4 - 20-mA or ±20-mA current loops. TPS26610 is suitable for protection in current inputs whereas TPS26611 is suitable for protection in multiplexed V/I inputs.

TPS26612 is suitable for protection in power supply of two wire current transmitters. With disabled auto-retry time for first overload event, TPS26612 enables start-up of power hungry transmitters requiring higher start up current for longer durations.

TPS26611 and TPS26612 devices can be also used to protect voltage outputs or digital communication signals like UART from miswiring of power supplies at these outputs. The device breaks the signal path by turning off the FETs when there is a voltage higher than supply voltage and thus keeping the system protected.

TPS2661x provides complete protection from industrial surge transients (IEC61000-4-5) and provides immunity from industrial fast transients (IEC610000-4-4) for signal lines.