Amplified Pressure Sensors 4 Inch Water Pressure Sensors Features * 0 to 4 Inch Water Pressure Ranges * Ratiometric 4V Output * Temperature Compensated * Calibrated Zero and Span Applications * Medical Instrumentation * Environmental Controls * HVAC General Description The Amplified line of middle pressure sensors is based upon a proprietary technology to reduce errors. This model provides a ratiometric 4-volt output with superior output characteristics. The sensor housing has been designed specifically to reduce errors associated with parasitic stress and strain. In addition the sensor utilizes a silicon, micromachined, stress concentration enhanced structure to provide a very linear output to measured pressure. These calibrated and temperature compensated sensors give an accurate and stable output over a wide temperature range. Each sensor is internally compensated using an ASIC compensation technique. This series is intended for use with non-corrosive, non-ionic working fluids such as air, dry gases and the like. The output of the device is ratiometric to the supply voltage and operation from any D.C. supply voltage up to +7 V is acceptable. Physical Dimensions 0.25 (6.4) Pin Size 0.010 x 0.020 (0.25 x 0.50) 0.10 Typical (2.54) 0.174 to 0.190 (4.4 to 4.8) Pin 1 2 3 4 0.21 (5.3) 1 pin 1: Vsupply pin 2: Common 0.42 (10.5) A 1.08 (27.4) 0.66 (16.0) 0.48 (12.2) 0.55 (14.0) NOTES: 1) Dimensions in inches (millimeters) pin 3: Voutput pin 4: do not B connect 0.80 (20.3) 0.85 (21.6) 1.10 (27.9) 4-30 Environmental Specifications Pressure Sensor Characteristics Maximum Ratings +3 to +7 Vdc Supply Supply Voltage VS Temperature Ranges 10 psig Common-mode pressure Compensated 250C Lead Temperature (soldering 2-4 sec.) 5 to 50 C Operating -25 to 85 C Storage -40 to 125 C Humidity Limits 0 to 95% RH (non condensing) Performance Characteristics for 4 INCH-D-4V Parameter, note 1 Minimum Nominal Maximum " H2O 4.0 Operating Range, differential pressure Output Span, note 5 Offset Voltage @ zero differential pressure Units 1.90 2.0 2.10 2.15 2.25 2.35 volt 40 mvolt 0.25 %fs 2 %span Offset Temperature Shift (5C-50C), note 2 0.05 Linearity, hysteresis error, note 4 Full Scale Shift (5C-50C), note 2 volt Performance Characteristics for 4 INCH-G-4V Minimum Parameter, note 1 Nominal Maximum Units " H2O 4.0 Operating Range, gage pressure Output Span, note 5 3.90 4.0 4.10 volt Offset Voltage @ zero pressure 0.15 0.25 0.35 volt 40 mvolt Offset Temperature Shift (5C-50C), note 2 0.05 Linearity, hysteresis error, note 4 Full Scale Shift (5C-50C), note 2 0.25 %fs 2 %span Equivalent Circuit Specification Notes 5.0 VOLT EXCITATION, FOR THE NOMINAL FULL SCALE PRESSURE AND ROOM TEMPERATURE PRESSURE MEASUREMENTS ARE WITH POSITIVE PRESSURE APPLIED TO PORT B. NOTE 2: SHIFT IS RELATIVE TO 25C. NOTE 3: SHIFT IS WITHIN THE FIRST HOUR OF EXCITATION APPLIED TO THE DEVICE. NOTE 4: MEASURED AT ONE-HALF FULL SCALE RATED PRESSURE USING BEST STRAIGHT LINE CURVE FIT. NOTE 5: THE VOLTAGE ADDED TO THE OFFSET VOLTAGE AT FULL SCALE PRESSURE. NOMINALLY THE OUTPUT VOLTAGE RANGE IS 0.25 TO 4.25 VOLTS FOR MINUS TO PLUS FULL SCALE PRESSURE. 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. 4-31 4