Digital input ICs address Industry 4.0 challenges

November 07, 2018 // By Rich Pell
Maxim Integrated (San Jose, CA) has announced an expanded family of digital input devices designed to address Industry 4.0 manufacturing automation challenges - such as a stronger need for real-time decision-making and feedback-loop mechanisms - which require digital input ICs inside programmable logic controllers (PLCs) to receive on/off status signals.

The expanded portfolio of IEC61131-2-compliant digital input devices offers what the company says is the industry's smallest solution size (by as much as 50%), the lowest power dissipation (by as much as 60%), up to 6x faster speed, and the most robust performance (integrating 1kV of surge protection and integrated diagnostics). One of the new devices, the MAX22192, is integrated into a Go-IO programmable logic controller (PLC) reference design.

In addition, the family also includes a parasitically powered digital input that reduces power dissipation by up to 60 percent and does not require a discrete isolated power supply. The newest devices include the following:

  • MAX22190 8-channel octal digital input with Serial Peripheral Interface (SPI), accurate input current limiters, built-in surge protection of >1kV and wire break detection in a 5mm x 5mm package
  • MAX22191 single-channel, parasitically powered digital input with accurate input current limiters and 250ns (max) propagation delay in a 2.8mm x 2.9mm package
  • MAX22192 8-channel octal digital input with isolated SPI, wire break detection and accurate input current limiters in a 6mm x 10mm package
  • MAX22195 high-speed octal digital input with parallel output and accurate input current limiters, 300ns (max) propagation delay, parallel interface, low power, low heat dissipation, fault tolerance with built-in diagnostics, configurability and a robust design in a 5mm x 5mm 32-TQFN package

"Maxim is committed to providing a superior, robust family of digital IO devices with many flavors to meet the varying demands of automated manufacturing environments," says Tim Leung, director, business management, Industrial Communications Business Unit, at Maxim Integrated. "The newest digital input products are poised to help take adaptive manufacturing to a new level."

The MAX22190, MAX22191, MAX22192, and MAX22195 are available for $2.73, $0.57, $5.22 and $2.20, respectively (1000-up, FOB USA). Evaluation kits - the MAX22190EVKIT ($72.00), MAX22191EVKIT ($43.00), MAX22192EVKIT ($72.00), and MAX22195EVKIT ($72.00) - are also available.

Maxim Integrated


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