Universal Transducer Interface

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Universal Transducer Interface
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Universal Transducer Interface
Technical aspects and examples
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Universal Transducer Interface
A single chip digitiser for
Resistive sensors
Capacitive sensors
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Universal Transducer Interface
The one chip digitiser
Configuration of output signal
Excitation for resistive sensors
Selfcalibrating by three signal technique
Measuring capacitive sensors without parasitics
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
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Universal Transducer Interface
Resistive mode
A direct relation between Vcd and Vbc without
offset
Called the three signal technique
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Universal Transducer Interface
Resistive mode
three signal technique
WHY?
No offset errors
No gain errors

No temperature drift
No long term drift
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Universal Transducer Interface
Resistive mode
IN PRACTICE THIS MEANS
high accuracy (15/16 bits)
no offset and gain adjustment
cost effective solution
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Universal Transducer Interface
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Universal Transducer Interface
Resistive mode
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Universal Transducer Interface
Resistive mode
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Universal Transducer Interface
A real revolution in Sensor Interfacing
digitises not only resistive elements
but also
all kind of capacitive sensors
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Universal Transducer Interface
The next slide tells you how the UTI scores!
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
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Universal Transducer Interface
Capacitive mode
Again the three signal technique to measure
the direct relation between a Cx and Cref
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Universal Transducer Interface
Example
Capacitive mode
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Universal Transducer Interface
Example
Capacitive mode
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Universal Transducer Interface
Example
Capacitive mode
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Universal Transducer Interface
Example
Capacitive mode
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Universal Transducer Interface
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Thank you for your attention
Ask for a demonstration tel [phone]
53 SmartecNL_at_compuserve.com