NPH Series Solid State Low Pressure Sensors Applications Features • Process control, P-to-I converters • Solid state, high reliability • Pneumatic control systems • Standard TO-8 package suitable for PC board mount • HVAC controls • Biomedical: Infusion pumps, sphygmomanometers, respirators • Aerospace: Altimeters, barometers, cabin pressure sensors • Computer peripherals • Low cost , small size • Available in gauge, absolute, and differential pressure versions • Media compatible with non-corrosive gases and dry air • Thermal accuracy FSO 0.5% typical • Overpressure capability to five times maximum rated pressure • Three standard ranges: 0 to 10 inH2O (0 to 25 mbar), 0 to 1 psi (0 to 0.06 bar), and 0 to 5 psi (0 to 0.34 bar) • Nonlinearity 0.05% FSO typical • Standard 3/16 in OD pressure port Amphenol Advanced Sensors • Ceramic substrate with temperature compensation resistors NPH Series Specifications Description Parameter Value Units Notes 0 to 10 inH2O (0 to 25 mbar) 0 to 2.5 kPa 0 to 1 psi (0 to 7 bar) 0 to 7 kPa 0 to 5 psi (0 to 0.34 bar) 0 to 30 kPa General An integrated circuit silicon sensor chip is housed in a standard TO-8 electrical package that is printed circuit board mountable. The latest techniques in micromachining have been used to ion-implant piezoresistive strain gauges into a wheatstone bridge configuration that is integrally formed on a micromachined silicon diaphragm. As with all NovaSensor silicon sensors, the NPH Series employs SenStable® processing technology, providing excellent output stability. Constant current excitation to the sensor produces a voltage output that is linearly proportional to the input pressure. Pressure Range Maximum Pressure 5x rated pressure (10) Electrical @ 77°F (25°C) Unless Otherwise Stated Input Excitation 1.5 mA 2 mA maximum Insulation Resistance 100 MΩ @ 50 VDC Input Impedance 3200 Ω ±25% Output Impedance 5000 Ω ±20% Bridge Impedance 5000 Ω ±20% Operating(9) –40 to 257 °F (-40°C to 125°C) The user can provide standard signal conditioning circuitry to amplify the 100 mV output signal. The sensor is compatible with most non-corrosive gases and dry air. Compensated 32 to 158 °F (0°C to 70°C) Vibration 10 gRMS 20 to 2000Hz Shock 100 g 11 milliseconds Life (Dynamic Pressure Cycle) 1 x 106 cycles A laser-trimmed, thick-film resistor network on a hybrid ceramic substrate provides temperature compensation. Mechanical (1) Weight <0.2 oz Media Compatibility Non-corrosive gases and clean, dry air Environmental Temperature Range (<5 g) Wetted Materials Top Port Nickel, gold plated Kovar, silicone gel, gold wire, RTV, silicon and glass. Gold plated Kovar, silicon, glass and RTV (9) Bottom Port Parameter Min. Typical 2.5 kPa Max. Min. Typical 7 & 30 kPa Max. Units -4 2 4 mV mV 2 50 75 150 mV 2 75 100 Notes Performance Parameters(7), Compensated(1) Offset -8 2 8 50 90 Full Scale (FS) Output 2.5 kPa 25 7 kPa 30 kPa NPH Series schematic diagram 125 mV 2 0.25 %FSO 3 0.05 0.2 %FSO -2 0.5 2 %FSO 3 -1.5 -0.5 1.5 %FSO 4 0.75 –0.5 0.2 0.5 %FSO 5 Linearity –1.0 0.1 1.0 –0.25 Hysteresis & Repeatability -0.2 0.05 0.2 -0.2 -3 0.5 3 Accuracy of FSO –3 –1 Thermal Hysteresis –0.75 0.5 0.05 Thermal Accuracy of Offset 4 Short-Term Stability of Offset 5 5 µV/V 6, 11 Short-Term Stability of FSO 5 5 µV/V 6, 11 1. Performance with offset, thermal accuracy of offset, and thermal accuracy of FSO compensation resistors. 2. FSO with 1.5mA input excitation. 3. Best fit straight line. 4. 32°F to 158°F (0°C to 70°C) with reference to 77°F (25°C) 5. 32°F to 158°F (0°C to 70°C), by design 6. Normalized offset/bridge voltage —100 hrs, typical value, not tested in production. 7. All values measured at 77°F (25°C) and at 1.5 mA, unless otherwise noted. 8. Reduced performance outside compensation range. 9. Backside differential tube is nickel or Kovar. 10. Top side pressure. 11. Typical specifications are for reference only; absolute values may vary. NPH Series Specifications NPH Series package diagram Ordering Information The code number to be ordered may be specified as follows: NPH Code Package Configuration 8 TO-8 Code 002.5 007 030 Pressure Range (kPa) 2.5 kPa; 10 inH2O 7 kPa; 1 psi 30 kPa; 4.35 psi Code A G D Pressure Absolute (30 kPa only) Gauge Differential Code H NPH - _____ - Compensation Hybrid substrate _____ - _____ - _____ Typical model number Amphenol Advanced Sensors www.amphenol-sensors.com © 2014 Amphenol Corporation. All Rights Reserved. Specifications are subject to change without notice. Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. AAS-920-275B-08/2014