Maxim Press Release | New small-size, low-power 4-20mA sensor transmitter improves accuracy in industrial automation systems

Latest update time：2018-02-08

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MAX12900 highly integrated 4-20mA sensor transmitter saves 20% space and reduces power consumption by 50%

now On the 28th, Maxim announced the launch of the MAX12900 ultra-low power, highly integrated 4-20mA sensor transmitter, which helps industrial automation applications create small size, low power consumption, and high precision designs. It is ideal for industrial automation and process control, loop-powered 4-20mA current transmitters, remote instruments, and smart sensors.

Today, system designers have to consider more factors when developing enhanced 4-20mA sensor transmitters. These include: improving measurement accuracy over a wide temperature range, reducing size to suit miniaturization requirements. In addition, designers also need to meet stringent conditions - the total current of the sensor transmitter does not exceed 4mA.

The MAX12900 features a 10 ppm/°C voltage reference, which reduces temperature drift by 3.5 times compared to traditional solutions, effectively improving system accuracy. The small MAX12900 (5mm x 5mm package size) integrates 10 optimized unit circuits, saving 20%-50% of space compared to traditional 4-20mA sensor transmitter solutions. The integrated high-voltage LDO and power sequence control function effectively simplifies the power-on control of 4-20mA sensor transmitters. The device consumes only 250uA of maximum current, saving up to 50% of power compared to traditional solutions. Using the latest MAX12900 solution, the pulse-width modulation data of the microcontroller is converted into a 4-20mA loop current in a 2-, 3-, or 4-wire configuration, effectively reducing the complexity of the solution and saving system cost. The MAX12900 is packaged in a 32-pin TQFN package and operates over an industrial wide temperature range of -40°C to +125°C.

Key Benefits

Small size: 20-50% smaller than traditional solutions; 5mm x 5mm package size
High accuracy: 10 ppm/°C voltage reference, 3.5 times less drift than conventional solutions; 0.01% linearity
Low power consumption: current consumption is 50% lower than traditional solutions; maximum current does not exceed 250uA

evaluate

“

By using the MAX12900, we have the flexibility to implement both 2-wire and 3-wire configurations in our solution. In addition, due to its high-precision characteristics, it is compatible with both mid-range and high-end 4-20mA transmitters.

”

--- Juergen Schmollinger, Head of Product Development for Pressure Sensors at IFM

“

The combination of integration and flexibility, as well as low power consumption and high accuracy, makes the MAX12900 an ideal choice for low-power sensor transmitters and industrial safety applications.

”

--- Carmelo Morello, Executive Business Manager at Maxim Integrated

Download block diagram: https://www.maximintegrated.com/en/products/interface/current-loop-products-4-20ma/MAX12900.html/md_rview9445#.Wk-3pUORPek.mailto

MAX12900EVKIT# Evaluation Kit Technical Details: https://www.maximintegrated.com/en/products/interface/current-loop-products-4-20ma/MAX12900EVKIT.html/tb_tab0

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