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Agenda

Agenda. Overview of TI TI Sensors & Controls Products Details of this Sensor. TEXAS INSTRUMENTS. Semiconductors. Sensors & Controls. Educational & Productivity Solutions. DLP ™ Products. Sensors & Controls Businesses. Sensors & Controls. Control Products. Sensor Products.

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Agenda

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  1. Agenda • Overview of TI • TI Sensors & Controls Products • Details of this Sensor

  2. TEXAS INSTRUMENTS Semiconductors Sensors & Controls Educational & Productivity Solutions DLP™ Products

  3. Sensors & Controls Businesses Sensors & Controls Control Products Sensor Products

  4. Sensor Business Products • Vehicle Stability • Pressure Sensors/Switches • Low-g Acceleration • Force Sensor • Air-Conditioning • Pressure Sensors/Switches • Pressure/Temperature Sensor • Engine • MAP sensor • Dynamic Pressure • Coolant Level Sensor • Oil Pressure Sensor • Common Rail Sensor • Transmission • Pressure Switch Manifold • Range Sensors • Pressure Sensors/Switches • Internal Mode Switches

  5. Automotive Pressure Transducers (APT) KEY FEATURES • Ceramic capacitive based sensor design • Integral signal conditioning electronics incorporating a custom-designed application-specific integrated circuit • Durable packaging for underhood and chassis mounted applications • Adaptable to pressure ranges up to 3000psi • Permanent calibration after assembly results in tight tolerances • Absolute or relative sensing • Accurate, stable signal over a wide operating temperature range (-40 to 135°C) • Compatible with most fluids in pressure-based automotive systems. • Temperature output can be added TYPICAL APPLICATIONS • High side and/or low side air conditioning • Engine controls: - Manifold pressure - Fuel pressure - Oil pressure - Boost pressure • Transmission • Suspension: - Load levelling - Anti-roll • Power steering • Exhaust 5

  6. Ceramic Capacitive Applications

  7. P R E S S U R E 100 M O V A B L E P L A T E OUTPUT (%Vcc) 75 V O L T A G E 50 25 F I X E D P L A T E C A P A C I T I V E SIGNAL 0 S E N S I N G CONDITIONER M O D U L E MODULE PRESSURE Sensor Technology Theory of Operation

  8. Capacitive Sensing Element (CSE) Diaphragm Substrate Guard Source Detect • Diaphragm and substrate are made of alumina ceramic • Impervious to automotive / heavy vehicle working fluids. • High strength, low hysteresis sensing element. • Pressure range adaptable from 1bar to 345 bar (15 psi to > 5000 psi). • Vacuum, gage and sealed gage configurations are available. • Small displaced volume (<0.002cm3) compliments hard pressure systems.

  9. Capacitive Sensing Element

  10. Conditioning Electronics Custom IC: • Low gain capacitance to voltage converter. • Stable performance over temperature and life. • Permanent calibration after assembly. Discrete SMT Components: • Resistors are used to adjust saturation values. • Provide essential external components (Reference and integrating capacitors). • Provide EMC and noise reduction. Flexible Circuit: • Increases reliability by minimizing solder stresses and decreasing the number of interconnections • Simplifies assembly process

  11. Pressure Transducer Components Connector Edge Clips Flex Circuit CSE Base Cover Gasket Hexport X-Section

  12. Pressure Transducer Specifics APPLICATION: Oil Pressure Sensor OPERATING PRESSURE RANGE: 0-128 psig PRESSURE REFERENCE: Vented to Atmospheric Pressure TEMPERATURE RANGE: -40o to 150o C PRESSURE TRANSFER FUNCTION: Output (%Vcc) = 0.625*P+10 Where P is Input Pressure in psig Supply Voltage = Vcc= 5.000V  0.100V OUTPUT VOLTAGE RANGE: 10% - 90% of Vcc MEASUREMENT TECHNOLOGY: Ceramic Capacitive CONNECTOR: 3 Pin Packard (Red = 5.000V, Black = Gnd, Green = Signal out) PORT FITTING:¼-18NPTF external threaded Brass C36000 ACCURACY REQUIREMENT: +/- 1.6%Vcc over all Temps and Pressures INTERNAL GASKET MATERIAL: Fluorosilicone, acceptable for air with moisture.

  13. Pressure Transducer Specifics • Sensor Output is Ratiometric with Supply Voltage (Vcc). • For example at 62psig the sensor output will be equal to 50% of the supply voltage. • When Vcc = 5.000V then the output voltage will be 2.500V. • But if Vcc = 5.100V then the output will be 2.550V. • The best way to use the sensor is to use the output as a % of Vcc. Output (%Vcc) = 0.625*P+10 Where P is Input pressure in psig Supply Voltage = Vcc= 5.000V  0.100V

  14. Production Sample Accuracy at 20 °C 250 Devices Plotted, CPk based on 2900 Devices 1.6 1.4 Cpk at 53psig = 4.3 1.2 1 0.8 0.6 0.4 0.2 0 -0.2 Cpk at 6psig = 5.3 -0.4 Cpk at 100psig = 9.0 -0.6 -0.8 -1 -1.2 -1.4 -1.6 0 10 20 30 40 50 60 70 80 90 100 Pressure, (psig)

  15. APT technology proven with over 14 years and 100 million devices in field A worldwide leader in Automotive and HVOR pressure sensors Global infrastructure to support regional engineering / program requirements in US, Europe and Japan Demonstrated ability to execute and launch fast moving projects Dedicated to providing innovative and custom solutions to meet customer requirements Able to leverage high volume production to provide best value Extensive engineering support for analysis, validation and continuous improvement APT Summary

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