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Analog Devices / Maxim Integrated MAX22190 Octal Industrial Digital Input

Analog Devices MAX22190 Octal Industrial Digital Input translates eight 24V current-sinking industrial inputs to a serialized SPI-compatible output that interfaces with 3V to 5.5V logic. This IEC 61131-2 compliant industrial digital input device features a current setting resistor that allows it to be configured for Type 1, Type 2, or Type 3 inputs. Field wiring is verified for proximity switches by a second threshold detector on each input. When wire-break is enabled, the FAULT output on the Analog Devices MAX22190 is asserted, and a registered flag is set if the input current drops below the wire-break threshold for more than 20ms. Additional diagnostics that assert FAULT include: over temperature, low 24V field supply, 24V field supply missing, and CRC communication error.

Features

  • High integration reduces BOM count and board space
    • Eight input channels with a serializer
    • Operates directly from field supply (7V to 65V)
    • Compatible with 3.3V or 5V logic
    • 5x5mm TQFN package
  • Fault-tolerant with built-in diagnostics
    • Input protection to ±40V with low-input leakage current
    • Wire break detection
    • Integrated field-supply voltage monitors
    • Integrated overtemperature monitor
    • 5-bit CRC code generation and transmission for error detection
  • Reduced power and heat dissipation
    • Accurate input-current limiters
    • Energyless field-side LED drivers
  • Configurability enables a wide range of applications
    • Configurable IEC 61131-2 Type 1, 2, 3 inputs
    • Configurable input current-limiting from 0.5mA to 3.4mA
    • Selectable input debounce filtering
  • Robust design
    • ±8kV contact ESD and ±15kV Air Gap ESD using a minimum 1kΩ resistor
    • ±1kV surge tolerant using a minimum 1kΩ resistor
    • -40°C to +125°C ambient operating temperature

Applications

  • Programmable Logic Controllers
  • Industrial automation
  • Process automation
  • Building automation

Isolated Octal Digital Input

Analog Devices / Maxim Integrated MAX22190 Octal Industrial Digital Input

Evaluation Tools

Analog Devices / Maxim Integrated MAX22190EVKIT Evaluation System

Used to evaluate the MAX22190 Octal Industrial Digital Input device with Diagnostic features.

Learn Moreabout Analog Devices / Maxim Integrated MAX22190EVKIT Evaluation System View Productsrelated to Analog Devices / Maxim Integrated MAX22190EVKIT Evaluation System
Published: 2018-06-26 | Updated: 2023-04-25