Sensors

Pressure sensing solution for automotive applications

30th September 2021
Kiera Sowery

Renesas has introduced the RAA2S425x family of ICs for automotive pressure sensing systems. The devices provide highly accurate amplification and sensor-specific correction of signals in automotive xEV/EV/FCEV pressure sensing braking, transmission and HVAC systems.

The RAA2S425x product family features high integration and advanced digital and analogue functionality that significantly ease the design cycle and reduce customers’ system BOM and production costs.

The RAA2S425x ICs support all major pressure sensing technologies and feature an analogue front-end (AFE) for enhanced signal conditioning. The new devices offer extended analogue sensor offset compensation (XSOC), adjustable to nearly all resistive bridges. They deliver pressure and temperature readings with high accuracy (0.35% - 1.0%) over a wide temperature range (-40°C to 150°C).

The RAA2S425x ICs integrate a 16-bit embedded RISC microcontroller that provides digital compensation of offset, sensitivity, temperature drift, and nonlinearity. It has highly reliable non-volatile memory (NVM) to store calibration coefficients and configuration data in harsh automotive environments. The RAA2S425x communicates digitally with calibration equipment, reducing noise sensitivity.

Digital calibration enables customers to keep assembly costs low since it doesn’t require trimming of sensing element. The company claim that RAA2S425x is an optimal solution for safety and harsh automotive applications with integration of overvoltage and reverse-polarity protection circuitry, ASIL-B compliance according to ISO26262, excellent electromagnetic compatibility, and multiple superior diagnostic features.

“The RAA2S425x product family showcases the unique capabilities that Renesas brings to automotive customers with our strong analog and digital technology portfolio,” said Christian Wolf, Vice President, Automotive Analog Sensor Business Division at Renesas.

“The new pressure sensing solution enables our customers to reduce design time with highly accurate, reliable systems meeting tough automotive safety requirements.”

The RAA2S425x devices are available today in 4mm x 4mm QFN-24 packages with wettable flanks.

For more information, please visit here.

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