USTI datasheet(1/3 Pages) TAB

Part #	USTI

Description	Universal Sensors and Transducers Interface

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Manufacturer	TAB [TECHNOLOGY ASSISTANCE BCNA 2010, S. L.]

Direct Link	http://www.techassist2010.com

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Universal Sensors and Transducers

Interface

USTI

FEATURES

 29 measuring modes and one generator mode

 2 identical channels

 Provides frequency (time)-to-digital conversion

for many types of sensors and transducers

 Provides interfacing for resistive (including

platinum (Pt), cuprum (Cu) resistors and

thermistors (Ni)), capacitive sensing elements

and resistive bridges

 Frequency range from 0.05 Hz up to 9 MHz

without prescaling and 144 MHz with

prescaling;

 Programmable accuracy (relative error) for

frequency (period) conversion from 1 % to

0.0005%

 Relative quantization error is constant in all

specified frequency range

 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

 Master and slave communication modes

 Frequency generator mode 10 MHz with quartz

crystal stability

APPLICATIONS

Physical and Chemical Sensor Systems

Digital Sensors, SoC, SiP, BioMEMS, Lab-on-Chip

Smart and Intelligent Sensors and Systems

Industrial and Process Control

Data Acquisition Systems

Instrumentations

Customer Electronics

Automotive

GENERAL DESCRIPTION

The Universal Sensors and Transducers Interface

(USTI) is a fully digital CMOS integrated circuit of

universal, 2-channel, high precision, multifunctional

converter based on novel, advanced methods for

frequency, period, its ratio, duty-cycle and phase-shift

measurements. It is perfectly suited to any applications

where frequency-time parameters but also sensors

output signal, have to be measured with highest

FUNCTIONAL BLOCK DIAGRAM

resolution and programmable accuracy during the non-

redundant conversion time.

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.

By using this IC it is possible to build a wide variety of

digital, smart sensors and intelligent sensor systems.

The device represents a high-resolution conversion

and designed to support all range of frequency-time

domain and digital sensor applications. It offers high

performances with flexibility and requires minimum

possible number of external components.

The USTI can be easy included into digital

environment, controlled by an external microcontroller

(slave mode) or work independently as a separate

measuring unit without an external control (master

mode). The function selection can be configured in

both software and hardware.

The IC converts frequency-time domain signals,

resistance and capacitance of sensing elements and

resistance of sensor bridges into digital and provides

digital, bus interface to microcontroller, DAQ or sensor

system to read these digital results. Sensing elements

can be directly connected to the USTI without the need

for extra electronics. Only a single reference element,

of the same kind as the sensor, is required.

The USTI has 29 measuring and one generating

modes. The measuring mode can be hardware-

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USTI Datasheet(PDF) 1 Page - TECHNOLOGY ASSISTANCE BCNA 2010, S. L.

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