Small Sensor Transmitter Promises Power & Space-saving In Industrial Automation


The new 4-20mA sensor transmitter from Maxim Integrated helps industrial designers to create small, low power, and highly accurate designs for applications such as industrial automation and process control, loop-powered 4-20mA current transmitters, remote instrumentation, and smart sensors.

The MAX12900 cuts cost by converting pulse width modulation data from a microcontroller into current over a 4-20mA loop with two, three, or four-wire configurations.

Key benefits of the MAX12900 include:-

  • Small size: Small 5mm x 5mm package integrates 10 optimized building blocks that results in significant space savings of 20%-50% vs. traditional 4-20mA sensor transmitter implementations.
  • High accuracy: It increases system accuracy with 10ppm/°C voltage reference for up to 3.5x lower drift compared to traditional solutions.
  • Low power: Its reduced current consumption for low power requires just 250uA of current maximum, enabling up to 50% power savings compared to traditional solutions.

The addition of an integrated high voltage LDO and power sequencing capability simplifies the power up of the 4-20mA sensor transmitter.


“With Maxim’s MAX12900, we now have the flexibility to implement 2- and 3-wire configuration in our solutions,” said Juergen Schmollinger, Group Leader, Development Electronics, Pressure Sensors at IFM. “In addition, we can use it with both a mid and high-end 4-20mA transmitter due to its high accuracy.”

“The combination of integration and flexibility, coupled with low power and high accuracy, makes the MAX12900 an ideal solution for low power sensor transmitters and industrial safety applications,” said Carmelo Morello, Executive Business Manager at Maxim Integrated.

The MAX12900 is available in a 32-pin TQFN package and operates over a wide industrial temperature range of -40°C to +125°C.

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The MAX12900 is available for $2.89 (1000-up, FOB USA). The MAX12900EVKIT# evaluation kit is available for $55



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