Model 27 UltraStable Medical Instrumentation PC Board Mountable Pressure Sensor Calibration 0-100 mV Output Process Control Gage Pressure Factory Automation Wide Temperature Range Air Flow Management Leak Detection DESCRIPTION The Model 27 is a high performance, temperature compensated, piezoresistive silicon pressure sensor packaged in a bottom tube TO-8 configuration. It provides excellent performance and long-term stability. Gage pressure ranges from 0-15 PSI to 0-250 PSI are available. Integral temperature compensation is provided over a range of -20°C to +85°C using laser-trimmed resistors. An additional laser-trimmed resistor is included to normalize pressure sensitivity variations by programming the gain of an external differential amplifier. This provides sensitivity interchangeability of ±1%. Please refer to the low pressure section for information on products with operating pressures less than 0-2 PSI. For an uncompensated sensor (Model 25) please contact the factory for FEATURES additional information. TO-8 Package -20°C to +85°C Compensated Temperature Range ±0.1% Non-linearity ±0.5% Temperature Performance 1.0% Interchangeable Span (provided by gain set resistor) Solid State Reliability Low Power DIMENSIONS STANDARD RANGES Range 1-40 psig 0 to 15 ● 0 to 30 ● 0 to 50 ● 0 to 100 ● 0 to 250 ● TO-8 – Wide Temperature Range Model 27 UltraStable PC Board Mountable Pressure Sensor PERFORMANCE SPECIFICATIONS Supply Current: 1.5mA Ambient Temperature: 25°C (Unless otherwise specified) PARAMETERS Full Scale Output Span, (without gain set resistor) MIN TYP MAX UNITS 75 100 150 mV 1 2 ±mV 3 2 Zero Pressure Output Pressure Non-linearity 0.05 0.1 ±% Span Pressure Hysteresis 0.01 0.1 ±% Span NOTES 3500 4500 Ω Temperature Error – Span 0.3 0.5 ±% Span 3, 4 Temperature Error – Zero 0.1 0.5 ±% Span 3, 4 Input Resistance 2500 Temperature Coefficient - Resistance 0.145 %/°C 4 0.05 ±% Span 4 Short Term Stability of Offset 0.05 ±% Span 11 Short Term Stability of Span 0.05 ±% Span 11 Thermal Hysteresis – Zero Long Term Stability of Offset 0.1 ±% Span 12 Long Term Stability of span 0.1 ±% Span 12 Supply Current 0.5 1.5 Response Time (10% to 90%) Output Noise Output Load Resistance Insulation Resistance (50 VDC) mA 5 1.0 msec 6 1.0 µV p-p 7 5 MΩ 8 50 MΩ 13 Rated 9, 14 Pressure Overload Operating Temperature 2.0 3X –40°C to +125°C Storage Temperature –50°C to +150°C Media Non-corrosive Gases Compatible with Wetted Materials Weight 3 Grams Notes 1. Output span of unamplified sensor. 2. Best Fit Straight Line. 3. For Model 27, compensation resistors are an integral part of the sensor package; no additional external resistors are required. Pins 11 and 12 must be kept open. Model 27 is interchangeable only when used with a gain stage. 4. Temperature range: -20°C to +85°C in reference to 25°C. 5. Guarantees input/output ratiometricity. 6. For a zero-to-full scale pressure step change. CONNECTIONS 7. 8. 9. 10. 11. 12. 13. 14. 10 10 Hz to 1 kHz. Prevents increase of TC-Span due to output loading. For top side application, 3X or 500 psi maximum, whichever is less. 20 psi for 2 psi and 5 psi versions. Wetted materials are glass, ceramic, silicon, RTV, nickel, and gold. Normalized offset bridge voltage: 7 days. 1 year. Between case and sensing element. For backside application, 3X not to exceed 100 psi on all ranges. ORDERING INFORMATION 27 - 015 G Type (G = Gage) Pressure Range Model APPLICATION SCHEMATIC June 2001 TO-8 – Wide Temperature Range Feel free to contact customer service with any questions at Toll free 1(800)745-8008; Phone (757)766-1500; Fax (757)766-4297 1-41