Signal Conditioning Chip for Resistive Bridge Automobile Pressure Sensor
NSA9260 (X) is an EMC enhanced AECQ100 compliant high integration chip for signal conditioning of resistance bridge automotive pressure sensors. The NSA9260 (X) adopts a high-precision variable gain instrument amplifier and a 24-bit ADC to form the main signal measurement channel, and a 24-bit ADC to form the auxiliary temperature measurement channel. With built-in digital processing engine, the NSA9260X supports second-order temperature drift calibration and the highest third-order nonlinear calibration for sensor zero temperature and sensitivity of the sensor. Its calibration coefficients are stored in a set of programmable EEPROMs. NSA9260X supports over-voltage and reverse-voltage protection, analog voltage output and PWM output, as well as sensor diagnosis.
Product Features
• Support -24V to 28V over voltage and reverse voltage protection for automotive sensor applications
• Integrated bridge drive, high precision PGA, 24-bit high precision ADC, supporting proportional measurement, strain gauge type or resistance bridge sensor input
• Support sensor diagnosis and output clamp function
• High-precision 1X ~ 256X variable gain instrument amplifier, up to 8x digital gain
• Built-in digital processor-based sensor calibration logic, supporting post-customer calibration, up to third-order nonlinear calibration and second-order temperature sensitivity and offset calibration
• Calibration data can be stored in EEPROM, p multiple times programmable
• Ratio-metric or absolute voltage output, supporting PWM output as well
• Enhanced EMC performance
• Proprietary OWI communication mode, supporting calibration after sensor assembly
• Operating temperature range: -40℃ ~ 150℃, compatible with AECQ100 standard
Application
• Auto pressure sensor module (TMAP, automotive air conditioning pressure, oil pressure sensor, brake pressure sensor, etc.)
• Industrial transmitter
Functional Block Diagram
All Resources
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