TruStability Board Mount Pressure Sensors 32321348 Issue D RSC SeriesHigh Resolution, High Accuracy, Compensated 1.6 mbar to 10 bar 160 Pa to 1 MPa 0.5 inH O to 150 psi 2 24-bit Digital SPI-Compatible Output Datasheet FEATURES Pressure range: 1.6 mbar to 10 bar 160 Pa to 1 MPa 0.5 inH O to 150 psi absolute range 1 bar to 8 bar 2 15 psi to 150 psi Pressure types: Absolute: internal vacuum reference and an output value proportional to absolute pressure Gage: referenced to atmospheric pressure and provide an output proportional to pressure variations from atmosphere Differential: allows measurement of pressure between the two pressure ports Total Error Band: As low as 0.25 %FSS depending on pressure range (after auto zero) Accuracy: 0.1 %FSS BFSL (Full Scale Span Best Fit Straight Line) Compensated temperature range: -40C to 85C -40F to 185F Power consumption: Less than 10 mW, typ. Size: Miniature 10 mm x 12,5 mm 0.39 in x 0.49 in package Output: 24-bit digital SPI-compatible Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity DESCRIPTION Level 1 requirements The RSC Series is a piezoresistive silicon pressure sensor offering a digital output for reading pressure over the DIFFERENTIATION specified full scale pressure span and temperature range. It Industry-leading long-term stability: Minimizes system is calibrated and temperature compensated for sensor offset, calibration needs and significantly reduces downtime. sensitivity, temperature effects, and non-linearity using a Industry-leading accuracy: Reduces software to correct 24-bit analog-to-digital converter with integrated EEPROM. system inaccuracies, which minimizes design time, helps Pressure data may be acquired at rates between 20 and 2000 samples per second over an SPI interface. It is intended for improve efficiency, and often simplifies development. use with non-corrosive, non-ionic gases, such as air and other Industry-leading flexibility: Modular design with many dry gases, designed and manufactured according to ISO package styles and options simplify integration. 9001 standards, and is REACH and RoHS compliant. Total Error Band: Provides true performance over the compensated temperature range, which eliminates the VALUE TO CUSTOMERS need to test and calibrate every sensor, thereby reducing Enhances performance: Output accelerates performance manufacturing cost. Improves system accuracy and offers through reduced conversion requirements and direct ease of sensor interchangeability due to minimal part-to- interface to microprocessors. Proprietary Honeywell part variation (see Figure 1 on page 3). technology combines high sensitivity with high burst and over pressure while providing industry leading stability (performance factors difficult to achieve in the POTENTIAL APPLICATIONS same sensor), providing flexibility in implementation and Medical: Airflow monitors, anesthesia machines, blood minimizing requirements for protecting the sensor without analysis machines, gas chromatography, gas flow sacrificing ability to sense very small changes in pressure. instrumentation, hospital room air pressure, kidney dialysis Cost-effective, high volume solution with a variety of machines, nebulizers, pneumatic controls, respiratory options. machines, sleep apnea equipment, spirometers, ventilators Enhances reliability: High burst pressures promote system Industrial: Barometry, drones, flow calibrators, gas reliability, minimize downtime, and can simplify design. chromatography, gas flow instrumentation, HVAC clogged High working pressures allow ultra-low sensors to be used continuously above the calibrated pressure range. filter detection, HVAC systems, HVAC transmitters, indoor Easy to design in: Package is small when compared to many air quality, life sciences, pneumatic control, VAV (Variable similar sensors, occupying less area on the PCB. Port and Air Volume) control, weather balloons housing options simplify integration. Wide pressure range simplifies use. PORTFOLIO Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Honeywell offers a variety of board mount pressure sensors Level 1 requirements: Allows avoidance of thermal and for potential use in medical and industrial applications. Our mechanical damage during solder reflow attachment categories of pressure sensor measurement include absolute, and/or repair that lesser rated sensors would incur, allows differential, gage or vacuum gage, with unamplified or unlimited floor life when stored as specified (simplifying storage and reducing scrap), eliminates lengthy bakes prior amplified sensors and covering a wide pressure range. to reflow, and allows for lean manufacturing due to stability and usability shortly after reflow. Energy efficient: Reduces system power requirements and enables extended battery life. Sensing and Internet of ThingsTruStability Board Mount Pressure Sensors RSC Series Table of Contents General Specifications ......................................................................................................... 3-5 Nomenclature and Order Guide ..................................................................................................6 Pressure Range Specifications 1.6 mbar to 10 bar .............................................................................................................7 160 Pa to 1 MPa ...............................................................................................................8 0.5 inH O to 150 psi ...........................................................................................................9 2 Dimensional Drawings DIP Packages .............................................................................................................. 10-12 SMT Packages ..............................................................................................................12-14 Recommended PCB Pad Layouts .............................................................................................. 14 Pinout ........................................................................................................................... 14 Recommended Circuit .......................................................................................................... 15 1.0 System Overview ......................................................................................................... 16 1.1 Major System Blocks ................................................................................................. 16 1.2 High-level Operating Sequence ...................................................................................... 16 1.3 Compensation Mathematics ......................................................................................... 17 2.0 System Initialization EEPROM ......................................................................................... 18 2.1 EEPROM Contents .............................................................................................. 18-19 2.2 EEPROM Communication ....................................................................................... 20-21 3.0 System Operation ADC ................................................................................................ 21 3.1 ADC Communications and Initialization ............................................................................. 22 3.2 Programming the Data Rate and Pressure/Temperature Modes .................................................... 22 3.3 ADC Reset Command ................................................................................................ 23 3.4 ADC Programming Sequence Power Up ........................................................................... 23 3.5 ADC Programming and Read Sequence Temperature Reading ................................................ 23-24 3.6 ADC Programming and Read Sequence Pressure Reading ........................................................ 24 4.0 Example Software ....................................................................................................... 25 4.1 Data Types ........................................................................................................... 25 4.2 Function Descriptions Pressure Comp.c ...................................................................... 25-26 4.3 Checksum Calculation ............................................................................................... 26 4.4 Compensation Sequence ............................................................................................ 27 4.5 Constraints ........................................................................................................... 27 5.0 Sensor Offset Zero Correction Procedure ............................................................................... 28 Additional Information .................................................................................................. back page 2 sensing.honeywell.com