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Smartec sensors:
 
  Temperature sensor  
  Humidity sensor  
  Infrared sensor  
  UTI Transducer  
  Pressure sensor  
  TAB Transducer  
  UFDC Frequency to Digital converter  
  USTI Sensor Interface  
   


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  UNIVERSAL SENSOR AND TRANSDUCER INTERFACE (USTI)


Create a Smart sensor with RS-232,  SPI or I2C interface 

 





USTI Universal Sensor and Transducer Interface

The Universal Sensors and Transducers Interface ( USTI ) is a fully digital CMOS integrated circuit for use with any sensor or transducer with a frequency, period, duty-cycle, interval, PWM , phase shift or pulse number output.  The USTI is perfectly suited to any applications where frequency-time parameters or  sensors output signals have to be measured with highest resolution and programmable accuracy during the non-redundant conversion time. The design is based on novel advanced methods for frequency, period, duty-cycle and phase-shift  measurements. 

The USTI covers a wide range of frequencies and accuracies for modern frequency-time domain sensors. In addition, the USTI provides interfacing for resistive (including platinum, cuprum resistors and thermistors), capacitive sensing elements and resistive bridges. The device represents a high-resolution conversion and is designed to support all range of frequency-time domain and digital sensor applications. The USTI  offers high performance with flexibility and requires minimum external components. 

 

  Features

• 2 identical channels
• Wide range of frequencies and accuracy
• High precision / high resolution
• Frequency (time) to digital conversion
• RS232, RS485, SPI or I2C Interface
• 29 Measuring modes
• 1 generating mode
• Measuring modes hardware selectable
• Relative modes hardware selectable
• Mode and accuracy set via interface
• Slave mode: control via microprocessor.
• Master mode: without external control. 
• Frequency range from 0.05 Hz to 9 MHz
• Frequency of 144 MHz with prescaling
• Programmable accuracy (relative error) for frequency (period) conversion from 1 % to 0.0005%.
• Non-redundant conversion time
• Scalable resolution
• Internal reference clock 625 kHz
• 20 MHz @ 20 MHz quartz oscillator
• Quartz-accurate automated calibration
• 3-wire serial interface (SPI compatible)
• 2-wire interface (I2C compatible)
• RS-232/485 serial interface

• Provides interface for resistive (including platinum (Pt), cuprum (Cu), resistors and thermistors (Ni)), capacitive sensing elements and resistive bridges. Only a single reference element, of the same kind as the sensor, is required.




 


  Typical Applications

• Design of Digital Smart Sensors.
• Intelligent sensor systems.
• Resistance bridge measurement.
• Time to Digital Conversion.
• Physical and Chemical Sensor
• SoC, SiP, BioMEMS, Lab-on-Chip
• Industrial and Process Control
• Data Acquisition Systems
• Instruments
• Consumer Electronics
• Automotive


Package

• 28 pin PDIP , 32 pin TQFP, 32 pin MLF.


Download PDF-File

USTI Sensor Datasheet   

USTI Specification / Application Datasheet

USTI ECAD Library

Part numbers 

USTI-PDIP

To order or request more information please contact sales@mms-e.com
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