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

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Presentation on theme: "SMT 160 – 30 SMART TEMPERATURE SENSOR World ’ s first digital temperature sensor since 1991."— Presentation transcript:

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

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

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

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

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

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

9 SMT 160 – 30 Technical aspects

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

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

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

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

14 SMT 160 – 30 Sensor output T2 T1 Vcc 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 SMT 160 – 30 Trigger level of micro T1 T3 T3  T1 due to cable capacitance

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

18 SMT 160 – 30 Temperature Sensor Microcontroller A demonstration to show AccuracyResolution

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


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