Pressure sensing ICs for automotive applications

September 28, 2021 // By Jean-Pierre Joosting
Pressure sensing ICs for automotive applications
ICs integrate multiple analog and digital functions to reduce design time and costs of xEV/EV/FCEV pressure sensing braking, transmission and HVAC systems.

Renesas Electronics Corporation 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 family features high integration and advanced digital and analog 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 a high-performance analog front-end (AFE) for enhanced signal conditioning. The new devices offer extended analog sensor offset compensation (XSOC), adjustable to nearly all resistive bridges. They deliver pressure and temperature readings with high accuracy (0.35% to 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. 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.


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