Model 1240 UltraStable Medical Instrumentation PC Board Mountable Pressure Sensor Calibration 0-50 mV Output Process Control Absolute, Differential and Gage Factory Automation Temperature Compensated Air Flow Management Leak Detection DESCRIPTION The Model 1240 is a high performance temperature compensated, piezoresistive silicon pressure sensor packaged in a dual-in-line configuration and intended for cost sensitive applications where excellent performance and long-term stability are required. 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, for interchangeability of ±1%. Gage and Differential pressure ranges from 0-15 PSI to 0-100 PSI are available. Absolute pressure ranges of 0-15 PSIA and 0-30 PSIA are available. Multiple lead and tube configurations are also available for customizing the package for specific applications. FEATURES Please refer to the low pressure section for information on -20°C to +85°C Compensated Temperature Range products with operating pressures less than 0-2 PSI. For a ±0.1% Non-linearity current set resistor, please refer to the Model 1230. ±0.5% Temperature Performance 1.0% Interchangeable Span (provided by current set resistor) Solid State Reliability Low Power compensated sensor using a gain set resistor as opposed to a DIMENSIONS STANDARD RANGES Range 1-20 psig psid psia 0 to 15 ● ● ● 0 to 30 ● ● ● 0 to 50 ● ● ● 0 to 100 ● ● ● HITs – Wide Temperature Range Model 1240 UltraStable PC Board Mountable Pressure Sensor PERFORMANCE SPECIFICATIONS Supply Voltage: See application schematic Ambient Temperature: 25°C (Unless otherwise specified) PARAMETERS MIN TYP MAX UNITS NOTES Full Scale Output Span 49.5 50.0 50.5 mV 1, 3 2 ±mV 3 2 Zero Pressure Output Pressure Non-linearity 0.05 0.1 ±% Span Pressure Hysteresis 0.01 0.1 ±% Span 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 Thermal Hysteresis – Zero 0.145 %/°C 4 0.05 ±% Span 4 Short Term Stability of Offset 0.05 ±% Span 14 Short Term Stability of Span 0.05 ±% Span 14 Long Term Stability of Offset 0.1 ±% Span 15 Long Term Stability of span 0.1 ±% Span 15 Supply Current 2.0 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 Pressure Overload Operating Temperature 3X Rated 9 –40°C to +125°C Storage Temperature –50°C to +150°C Media Non-corrosive Gases Compatible with Wetted Materials Weight 3 Grams 10 Notes 1. Output span of unamplified sensor using current set resistor. 2. Best Fit Straight Line. 3. Compensation resistors are an integral part of the sensor package; no additional external resistors are required. Pins 7 and 8 must be kept open. 4. Temperature range: -20 to +85°C in reference to 25°C. 5. Guarantees input/output ratiometricity. 6. For a zero-to-full scale pressure step change. 7. 10 Hz to 1 kHz. 8. Prevents increase of TC–Span due to output loading. 9. 3X or 200 psi maximum, whichever is less. 10. Wetted materials are glass, ceramic, silicon, RTV, nickel, gold, and aluminum. 11. Soldering of lead pins: 250°C for 5 seconds maximum. 12. Tube length: L=470 ± 5 mil, S=300 ± 3 mil, N=no tube. 13. Lead pins can either be in the same or the opposite direction as the pressure tube. See Connections/Dimensions drawing for lead configurations. 14. Normalized offset bridge voltage: 7 days. 15. 1 year. CONNECTIONS ORDERING INFORMATION 1240 - 015 G - 3 S Pressure Tubes (L, S, N - see note 12) Lead Configuration (1, 3 - see note 13) Type (G = Gage, A = Absolute, D = Differential) Pressure Range Model APPLICATION SCHEMATIC June 2001 HITs – 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 1-21