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1 General description

The FXPS7550A4 high-performance, high-precision absolute pressure sensor consists of a compact capacitive micro-electro-mechanical systems (MEMS) device coupled with a digital integrated circuit (IC) producing a fully calibrated analog output. This sensor is ideal for many automotive applications such as manifold air pressure (MAP), turbo MAP, comfort seating, and other applications requiring operating absolute pressure ranges up to 550 kPa. The sensing element is based on NXP's high precision capacitive pressure cell technology. The architecture

benefits from redundant pressure transducers as an expanded quality measure. It delivers highly accurate ratiometric analog readings of absolute pressure while operating from either a 3.3 V or 5.0 V power supply. The sensor operates over a pressure range of 20 kPa to 550 kPa and over a wide temperature range of –40 oC to 130 oC. The sensor comes in an industry-leading 4 mm x 4 mm x 1.98 mm, restriction of hazardous substances (RoHS) compliant, high-power quad flat no-lead (HQFN) package[1] suitable for small printed circuit board (PCB) integration. Its AEC-Q100[2] compliance, high accuracy, reliable performance, and high media resistivity make it

ideal for use in automotive, industrial, and consumer applications.

2 Features and benefits

? Absolute pressure range: 20 kPa to 550 kPa

? Operating temperature range: –40 °C to 130 °C

? Analog output for monitoring of the absolute pressure signal

? Pressure transducer and digital signal processor (DSP)

– Internal self-test

? Capacitance to voltage converter with anti-aliasing filter

? Sigma delta ADC plus sinc filter

? 800 Hz or 1000 Hz low-pass filter for absolute pressure

? Lead-free, 16-pin HQFN, 4 mm x 4 mm x 1.98 mm package

3 Applications

3.1 Automotive

? Manifold air pressure

– MAP, TurboMAP

? Small engine control

? Liquid propane gas (LPG) or compressed natural gas (CNG) engine management

3.2 Industrial

? Compressed air

? Manufacturing line control

? Gas metering

? Weather stations

3.3 Medical/Consumer

? Blood pressure monitor

? Medicine dispensing systems

? White goods