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1 General description

The FXPS7250D4S high-performance, high-precision barometric absolute pressure (BAP) sensor consists of a compact capacitive micro-electro-mechanical systems (MEMS) device coupled with a digital integrated circuit (IC) producing a fully calibrated digital output.

The sensor is based on NXP's high-precision capacitive pressure cell technology. The architecture benefits from redundant pressure transducers as an expanded quality measure. This sensor delivers highly accurate pressure and temperature readings through either a serial peripheral interface (SPI) or an inter-integrated circuit (I2C) interface. Furthermore, the sensor employs an on-demand digital self-test for the digital IC and the MEMS transducers.

The sensor operates over a pressure range of 20 kPa to 250 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 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 250 kPa

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

? Pressure transducer and digital signal processor (DSP)

– Digital self-test

? I2C compatible serial interface

– Client mode operation

– Standard mode, Fast mode, and Fast-mode Plus support

? 32-bit SPI compatible serial interface

– Sensor data transmission commands

– 12-bit data for absolute pressure

– 8-bit data for temperature

– 2-bit basic status and 2-bit detailed status fields

– 3, 4, or 8-bit configurable CRC

? 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

? Engine management digital MAP and BAP

? Comfort seating

? 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