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High-Voltage Reverse-Input-Capable 4–20mA Current Loop Protector

Industry's First Integrated 4mA to 20mA Current Loop Protector for Industrial Analog Input Modules

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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Key Features

  • High Performance
    • Low On-Resistance 25Ω (typ)
    • Accurate ±10% Current Limit
    • +2.3V to +40V Wide Supply Voltage Range
    • Low Operating Current
    • Ultra-Low Temperature Coefficient
  • Robust Protection for Sensors
    • Avoids Power Dissipation Issues Compared to Discrete Solutions
    • Thermal Shutdown
    • Reverse Input Protection
  • Saves Space in Compact Systems
    • Eliminates Need for Discrete PTC Poly Switch, Zener Diodes, and Resistors
    • 3mm x 3mm, 6-Pin TDFN Package

Applications/Uses

  • Industrial Current Loop Control

Description

The MAX14626 current loop protector features a current-limit switch to prevent damage to the analog input module from sensor failure. The current-limit switch features a 25Ω (typ) on-resistance and operates from a +2.3V to +36V input voltage range. The accurate current limit is set to 30mA, making the part ideal for protecting the sensor reading devices.

The MAX14626 handles an overcurrent event in a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse-input blocking to protect from being reverse connected into the sensor.

The device is available in a tiny 6-pin (3mm x 3mm), TDFN exposed pad package and is specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX14626: Typical Operating Circuit MAX14626: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .