Digital input ICs halve footprint and lower power

To meet the size, power and performance requirements of Industry 4.0, Maxim Integrated has added to its family of digital input devices.

One, the MAX22192, is integrated into the company’s new Go-IO programmable logic controller (PLC) reference design.

Increased automation means a need for real-time decision-making and feedback-loop mechanisms. These intelligent Industry 4.0 systems require digital input ICs inside the PLCs to receive on/off status signals. They must also be robust, high performing and robust for integration throughout manufacturing environments.

Maxim’s expanded portfolio of IEC61131-2-compliant digital input devices is claimed to offer the industry’s smallest solution size (by as much as 50 per cent), the lowest power dissipation (by as much as 60 per cent), and is up to six times faster and has the most robust performance (integrating 1kV of surge protection and integrated diagnostics).

The family also includes a parasitically powered digital input that reduces power dissipation by up to 60 per cent and does not require a discrete isolated power supply.

The digital input devices available from Maxim are the MAX22190 eight-channel octal digital input with serial peripheral interface (SPI), accurate input current limiters, built-in surge protection of more than 1kV and wire break detection in a 5.0 x 5.0mm package.

The MAX22191 single-channel, parasitically powered digital input with accurate input current limiters and 250ns (max) propagation delay is in a 2.8 x 2.9mm package; the

MAX22192 eight-channel octal digital input with isolated SPI, wire break detection and accurate input current limiters in a 6.0 x 10mm package.

The MAX22195 high-speed octal digital input ICs have 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 5.0 x 5.0mm 32-TQFN package.

These ICs join the MAX14912 and MAX14913 octal high-speed, switch/push-pull driver with integrated surge protection, diagnostics and fast/safe demagnetisation, the MAX14914 universal digital IO with surge protection, high-side switch/push-pull driver/digital input and an SPI and the MAX14483 six-channel, high-density, high-speed, low-power digital isolator optimised for daisy chained SPI applications.

Evaluation kits (MAX22190, MAX221919, MAX22192 and MAX22195) are also available.

Visit Maxim at electronica 2018 in Hall C4, Stand 440.

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