Maxim Integrated’s subsystem reference designs accelerate and simplify factory automation with end-to-end integration of the signal chain.

Three new low-power reference designs from Maxim Integrated Products (Munich, Germany) provide end-to-end integration of the signal chain, simplifying factory automation.

The Carmel, Monterey, and Fremont industrial reference designs are fully tested subsystems, complete with schematics, layout files, and firmware, and are available for immediate use and customization. Each reference design integrates multiple functions to provide a highly accurate solution for an automated factory task. Available for purchase, each board ensures rapid prototyping, early software development, and speed of design.


The Carmel (MAXREFDES18#) subsystem provides a high-accuracy, low-noise analog output. Carmel is ideal for programmable logic controllers (PLCs) and distributed control systems (DCS).

  • High performance: accurate output from high voltages down to true zero.
  • Integrated error reporting: detection of short circuit, open circuit, brown-out, and overtemperature conditions.
  • Flexibility: provides both current and voltage outputs, including bipolar signals of -20 to 20 mA and -10 to 10 V.


The Monterey (MAXREFDES15#) subsystem is a high-accuracy, industrial loop-powered sensor transmitter that converts a standard temperature sensor input (RTD PT1000) to a 4–20 mA signal that is immune to noise and is constant over long distances. It is ideal for distributed industrial sensor systems.

  • Ultra-low power: system current consumption is less than 2.1 mA.
  • High accuracy: supports 0.1 % system accuracy over a full process variable-input range.
  • Ease of design: all design files are included for rapid prototyping.


The Fremont (MAXREFDES6#) subsystem is a low-power analog front-end (AFE) that accepts inputs of 0 to 100 mV. It is ideal for low-voltage output sensors, and process control and medical applications.

  • Low power: less than 300 mW typical power consumption.
  • Reduced time to market: fast prototyping with all necessary design files included.
  • Simplicity: single-ended system eliminates the need to convert to differential signals.

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