Overview
Description
The RAA2S4251B is a member of Renesas’ family of CMOS integrated circuits for highly accurate amplification and sensor-specific correction of differential bridge sensor signals. Featuring a maximum analog pre-amplification of 900 with analog sensor offset correction (XSOC), the RAA2S4251B is adjustable to nearly all resistive bridges.
Conditioning calculation is accomplished via a 16-bit RISC microcontroller. Calibration coefficients and configuration data are stored in the nonvolatile memory (NVM), which is reliable in automotive applications.
Measured values are provided via a ratio-metric analog output signal. End-of-line calibration is also supported through this output pin via a One-Wire Interface (OWI). Digital calibration helps keep assembly cost low as no trimming by external devices or lasers is needed. The RAA2S4251B is optimized for harsh automotive environments by over-voltage and reverse polarity protection circuitry, excellent electromagnetic compatibility, and multiple diagnostic features.
Features
- Capable of measuring one full resistive bridge sensor signals
- Temperature measurement using external diode/PTC/TCR or internal (PTAT) sensor
- Large sensor offset correction using analog offset compensation and digital zooming with up to 18-bit resolution
- Higher digital resolution, fast OUR output update rate by ADC & sharp roll-off by digital LPF
- Ability to cover large sensor span & high accuracy (0.35% - 1.0%) over the entire temp. range (-40°C to 150°C)
- Qualified according to AEC-Q100 Grade 0
- Optimized for harsh automotive environment
- Over-voltage and reverse polarity protection ±40V, robust EMC performance, and multiple diagnostic features
- Minimal EOL (end-of-line) production costs during mass production
- QFN-24 as package option
- Analog output
Comparison
Applications
Documentation
Featured Documentation
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| Type | Title | Date |
| Datasheet | PDF 617 KB | |
| Manual - Hardware | PDF 279 KB | |
| Manual - Hardware | PDF 712 KB | |
| Manual - Hardware | PDF 374 KB | |
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Design & Development
Software & Tools
The plug-in for the RAA2S425x requires the 32-bit version of RICBox 7.x.x.
Software & Tools
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Software type
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Company
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| Renesas IC Toolbox (RICBox) The Renesas IC Toolbox (RICBox) software platform enables customers to configure Renesas devices on evaluation kits when attached to the computer running the software.
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Software Package | Renesas |
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Boards & Kits
Evaluation
RAA2S425XKIT
Active
RAA2S425XKIT Evaluation Kit
The evaluation kit provides an entry point to evaluate RAA2S425X product family.
Recommended Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
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Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
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RAA2S4251
Dear members: I am currently examining whether the RAA2S4251 chip can be applied to our 0.5V-4.5V output, ratio-metric pressure transmitters. However, I found that the ZSSC4151C chip also has similar performance. What are the differences between the two chips, RAA2S4251 and ZSSC4151C ? Regards,
Sep 5, 2023 -
What does the AFEDAC value mean and how I choose it in RAA2S4251 configuration process
Dear Renesas Community members: We are, using RAA2S4251 chip, currently developing the 0.5V to 4.5V output, ratio-metric pressure transmitters. Our pressure transmitters include Piezo-resistive full bridge sensor and PCBs. Using the Evaluation Board and relevant GUI, we want to test the calibration capabilities of them to ...
Oct 11, 2023 -
Is it prohibited to supply External power directly to the External PCB which is connected to the RAA2S4251 Evaluation Board ?
Dear Renesas Community members: We are currently reviewing and developing the RAA2S4251 chip for use in our 0.5V to 4.5V output, ratio-metric pressure transmitters. Using the Evaluation Board and relevant GUI, we would like to test the calibration capabilities of them to the External PCB containing the ...
Oct 4, 2023
Videos & Training
An overview of the RAA2S425x Family of ICs for automotive pressure sensing systems. Renesas’ SSCs provide highly accurate amplification and sensor-specific correction of signals in automotive xEV/PHEV/FCEV and BEV pressure sensing braking, transmission and HVAC systems.
News & Blog Posts
Blog Post
Sep 25, 2022
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