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SMT 160 – 30

SMT 160 – 30. SMART TEMPERATURE SENSOR. World ’ s first digital temperature sensor since 1991. SMT 160 – 30. Smart temperature sensor. A one chip solution for. Temperature measurement. Calibrated and Digitised. A real cost saving solution. SMT 160 – 30. Features:.

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SMT 160 – 30

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  1. SMT 160 – 30 SMART TEMPERATURE SENSOR World’s first digital temperature sensor since 1991

  2. SMT 160 – 30 Smart temperature sensor A one chip solution for Temperature measurement Calibrated and Digitised

  3. A real cost saving solution SMT 160 – 30 Features: Short design-in time Replace hardware by software Easy testing of PC-boards No EMC precautions needed

  4. Only digital transport No corrections and adjustments Simple (standard) software Very little PCB surface SMT 160 – 30 Short design in time

  5. Duty-cycle analogue signal structure Very high resolution < 0.005ºC digital signal noise!! Only ratio no Crystal reference needed SMT 160 – 30 Accuracy and resolution Calibrated on chip level

  6. software examples Our WWW interface boards for 8 temperature sensors Ask your distributor special support for your application SMT 160 – 30 Available tools for quick design-in

  7. SMT 160 – 30 Where used? Some applications: professional ovens and measuring instruments (HP) thermal management in power supplies (trains) space

  8. SMT 160 – 30 Where used? other applications: solar panel thermal management systems undersea cable amplifiers climate control and many more

  9. Technical aspects SMT 160 – 30

  10. many encapsulations high accuracy very high resolution SMT 160 – 30 Features:

  11. TO220 TO18 HE (8x2.5 mm) SOIC TO92 PRESENTLY AVAILABLE ENCAPSULATIONS SMT 160 – 30

  12. Inside the sensor-chip Vcc calibration i OUT T2 T1 i C PTAT GND D.C.=T1/T2 PTAT element is temperature dependent PTAT = Proportional To Absolute Temperature SMT 160 – 30

  13. Functional description Digital interpretation Sensor output Vcc (T1/T2)-0.320 Temp = ------------------ [ºC] 0.00470 T2 Analogue Interpretation T1 Low pass filtering D.C.=T1/T2 T1 Vout = Vcc * ----- T2 R C V SMT 160 – 30

  14. Sensor output Vcc T2 T1 SMT 160 – 30 Why Duty Cycle? - no need for Crystal reference only ratio between up and total period contains information - performance check If there is a pulse, sensor is correct if not, sensor defect - easy to simulate for test-purposes

  15. SMT 160 – 30 Sensor output standard totem pole output excellent protection against EMC max 10 metres of cable (shielded!) 1 km with digital interface driver

  16. Trigger level of micro T3  T1 due to cable capacitance T3 T1 SMT 160 – 30

  17. Sensor output duty cycle linear with temperature Formula: D.C.= 0.320 + 0.00470*T D.C.=0 T= -68.1 ºC D.C.=1 T= 144.7 ºC SMT 160 – 30

  18. SMT 160 – 30 Sensor Temperature Microcontroller A demonstration to show Accuracy Resolution

  19. Thank you for your attention Ask for a demonstration tel +31 76 520 53 53 SmartecNL@compuserve.com

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