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