Basic Pressure Sensor Vacuum Pressure Sensor Features * 0 to 15 PSIA * 0.5 % linearity version Applications * Medical Instrumentation * Environmental Controls * HVAC General Description This sensors is comprises a silicon micromachined silicon sensor in a low cost pc board mountable package. This sensor has an internal vacuum reference and provides an output signal proportional to absolute pressure. This sensor has no temperature compensation or calibration. This sensor is intended for the user seeking a low cost sensor where the user will provide all the compensation. Physical Dimensions 0.154 (3.9) 0.50 (12.7) 0.62 (15.7) Pin 1 2 3 4 0.10 Typical (2.54) 0.080 O.D. (2.00) NOTES: 1) Dimensions in inches (millimeters) 2) Pin Out: pin 1: Vsupply pin 2: Vout minus pin 3: Ground pin 4: Vout plus 4-43 4 Pressure Sensor Characteristics Maximum Ratings Environmental Specifications Supply Supply Voltage VS 6 Vdc Temperature Ranges Lead Temperature (soldering 2-4 sec.) 250C Operating -25 to 85 C Storage -40 to 125 C Humidity Limits 0 to 95% RH (non condensing) Performance Characteristics for 15 PSI-A-BASIC Parameter, note 1 Minimum Nominal Maximum psia 15 Operating Range 2.8 Output Sensitivity 3.6 Offset Voltage @ zero pressure Temperature Coefficient of Resistance, note 2 2200 -1600 -2200 4.4 mV/V/psi 20 mV 3400 mV 0.5 %fs -2800 %fs 2800 Linearity, hysteresis error, note 3 Temperature Coefficient of Sensitivity, note 2 Specification Notes 5.0 VOLT EXCITATION, FOR THE NOMINAL FULL SCALE PRESSURE AND ROOM TEMPERATURE PRESSURE MEASUREMENTS ARE WITH VACUUM TO THE PRESSURE PORT. NOTE 2: SHIFT IS RELATIVE TO 25C. SPECIFICATION NOTS FIRST ORDER TERM OF A SECOND ORDER EQUATION. THE SECOND ORDER TER IS LESS THAN 10 PPM/DEGREE C SUARED AND IS POSITIVE. NOTE 3: MEASURED AT ONE-HALF FULL SCALE RATED PRESSURE USING BEST STRAIGHT LINE CURVE FIT. NOTE 1: ALL PARAMETERS ARE MEASURED AT UNLESS OTHERWISE SPECIFIED. All Sensors reserves the right to make changes to any products herein. All Sensors does not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. Equivalent Circuit +Vsupply 3 Input Resittance 3.0 k ohm Output Resistance 3.0 k ohm -Voutput 4 + Voutput 2 -Vsupply 1 4-44 Units