TruStability Board Mount Pressure Sensors 32321348 Issue A 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 15 psi to 2 150 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: -40 C to 85 C -40 F to 185 F Burst and working pressures: Vary by pressure range Supply voltage: 2.7 Vdc to 5 Vdc Power consumption: Less than 10 mW, typ. optional sleep DESCRIPTION mode available upon request The RSC Series is a piezoresistive silicon pressure sensor Size: Miniature 10 mm x 12,5 mm 0.39 in x 0.49 in package offering a digital output for reading pressure over the specified Output: 24-bit digital SPI-compatible full scale pressure span and temperature range. It is calibrated Effective Number of Bits ENOB : 16 bits and temperature compensated for sensor offset, sensitivity, Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Level 1 temperature effects, and non-linearity using a 24-bit analog-to- requirements digital converter with integrated EEPROM. Pressure data may be acquired at rates between 20 and 2000 samples per second DIFFERENTIATION over an SPI interface. It is intended for use with non-corrosive, Industry-leading long-term stability: Minimizes system non-ionic gases, such as air and other dry gases, designed and calibration needs and significantly reduces downtime. manufactured according to ISO 9001 standards, and is REACH Industry-leading accuracy: Reduces software to correct and RoHS compliant. system inaccuracies, which minimizes design time, helps improve efficiency, and often simplifies development. VALUE TO CUSTOMERS Industry-leading flexibility: Modular design with many Enhances performance: Output accelerates performance package styles and options simplify integration. through reduced conversion requirements and direct Total Error Band: Provides true performance over the interface to microprocessors. Proprietary Honeywell compensated temperature range, which eliminates the technology combines high sensitivity with high burst and need to test and calibrate every sensor, thereby reducing over pressure while providing industry leading stability manufacturing cost. Improves sensor accuracy and offers (performance factors difficult to achieve in the same sensor), ease of sensor interchangeability due to minimal part-to-part providing flexibility in implementation and minimizing variation (see Figure 1 on page 3). requirements for protecting the sensor without sacrificing ability to sense very small changes in pressure. POTENTIAL APPLICATIONS Cost-effective, high volume solution with a variety of options. Medical: Airflow monitors, anesthesia machines, blood Enhances reliability: High burst pressures promote system analysis machines, gas chromatography, gas flow reliability, minimize downtime, and can simplify design. instrumentation, hospital room air pressure, kidney dialysis High working pressures allow ultra-low sensors to be used machines, nebulizers, pneumatic controls, respiratory continuously above the calibrated pressure range. machines, sleep apnea equipment, spirometers, ventilators Easy to design in: Package is small when compared to many Industrial: Barometry, drones, flow calibrators, gas similar sensors, occupying less area on the PCB. Port and chromatography, gas flow instrumentation, HVAC clogged housing options simplify integration. Wide pressure range filter detection, HVAC systems, HVAC transmitters, indoor simplifies use. air quality, life sciences, pneumatic control, VAV (Variable Air Meets IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Level Volume) control, weather balloons 1 requirements: Allows avoidance of thermal and mechanical damage during solder reflow attachment and/or repair that PORTFOLIO lesser rated sensors would incur, allows unlimited floor life Honeywell offers a variety of board mount pressure sensors when stored as specified (simplifying storage and reducing for potential use in medical and industrial applications. Our scrap), eliminates lengthy bakes prior to reflow, and allows for categories of pressure sensor measurement include absolute, lean manufacturing due to stability and usability shortly after differential, gage or vacuum gage, with unamplified or amplified reflow. sensors and covering a wide pressure range. Energy efficient: Reduces system power requirements and enables extended battery life. Safety and Productivity SolutionsTruStability Board Mount Pressure Sensors RSC Series Table of Contents General Specifications ..................................................................................... 3-4 Nomenclature and Order Guide ................................................................................5 Pressure Range Specifications 1.6 mbar to 10 bar .......................................................................................6 160 Pa to 1 MPa .........................................................................................7 0.5 inH O to 150 psi ......................................................................................8 2 Dimensional Drawings DIP Packages ......................................................................................... 9-11 SMT Packages ........................................................................................ 11-13 Recommended PCB Pad Layouts ............................................................................. 13 Pinout ................................................................................................... 14 Recommended Circuit ...................................................................................... 14 1.0 System Overview ..................................................................................... 15 1.1 Major System Blocks .............................................................................. 15 1.2 High-level Operating Sequence ..................................................................... 15 1.3 Compensation Mathematics. . . . . . .................................................................. 16 2.0 System Initialization EEPROM ........................................................................ 17 2.1 EEPROM Contents ............................................................................. 17-18 2.2 EEPROM Comunication ......................................................................... 19-20 3.0 System Operation ADC ..............................................................................20 3.1 ADC Communications and Initialization ............................................................... 21 3.2 Programming the Data Rate and Pressure/Temperature Modes ............................................ 21 3.3 ADC Reset Command ............................................................................ 21 3.4 ADC Programming Sequence Power Up .............................................................22 3.5 ADC Programming and Read Sequence Temperature Reading ........................................ 22-23 3.6 ADC Programming and Read Sequence Pressure Reading ..............................................23 4.0 Example Software .................................................................................... 24 4.1 Data Types ..................................................................................... 24 4.2 Function Descriptions Pressure Comp.c ............................................................ 24 4.3 Checksum Calculation ............................................................................ 25 4.4 Compensation Sequence ........................................................................ 25-26 4.5 Constraints ......................................................................................26 5.0 Sensor Offset Zero Correction Procedure ................................................................ 26 Additional Information .......................................................................................27 2 sensing.honeywell.com