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 nonredundant conversion time.

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