The RAA2S425x integrated circuits are compatible with leading 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 virtually all resistive bridges. They provide highly accurate pressure and temperature readings (0.35%–1.0%) across a wide temperature range (–40°C to 150°C).
The RAA2S425x ICs incorporate an integrated 16-bit RISC microcontroller that provides digital compensation for offset, sensitivity, temperature drift, and nonlinearity. They feature highly reliable non-volatile memory (NVM) for storing calibration coefficients and configuration data in harsh automotive environments. The RAA2S425x communicates digitally with the calibration equipment, reducing sensitivity to noise. Digital calibration allows customers to keep assembly costs low, as it eliminates the need to trim the sensor element. The RAA2S425x is an optimal solution for automotive and security applications, featuring integrated overvoltage and reverse polarity protection circuitry, ASIL-B compliance according to ISO 26262, excellent electromagnetic compatibility, and multiple superior diagnostic functions.
Key features of the RAA2S425x pressure sensing solution:
High-performance AFE for improved signal conditioning;
High-precision pressure readings from 0.35% to 1.0%; Effective ADC resolution of 13 to 18 bits;
Wide temperature range from -40°C to 150°C; AEC-Q100 Grade 0 rating (-40°C to 150°C);
ASIL-B automotive compliance according to ISO 26262.
Extended analog sensor offset compensation (XSOC) enables compatibility with multiple resistive bridges with on-chip selectable PTAT (proportional to absolute temperature) support for external temperature sensing.
Digital compensation for offset, sensitivity, temperature drift, and nonlinearity increases accuracy.
Digital calibration reduces assembly costs by eliminating the need to trim sensing elements.
Calibration and configuration data are stored in highly reliable non-volatile memory.
Metric ratio analog output signal and 100µs output update rate in the fastest mode.
Diagnostics and fault checking ensure safe operation.
Static and time-domain diagnostic modes are available.
- Details
- Category: Integrated Circuits
Renesas RAA2S425x CI pressure sensor for braking, transmission and climate control systems
Renesas Electronics Corporation has introduced the RAA2S425x family of integrated circuits for automotive pressure sensing systems. The new devices provide high-precision amplification and sensor-specific correction of signals in the braking, transmission, and climate control systems of xEV/EV/FCEV vehicles.
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