Current Transducer with analog output CUR 3105

The CUR 3105 is a current transducer based on the Hall
effect. The IC can be used for very precise current measurements.
The output voltage is proportional to the measured current
and the supply voltage (ratiometric analog output). Major characteristics, such as magnetic field range, sensitivity, output quiescentvoltage (output voltage at B=0mT) and output voltage range
are programmable and are stored in the internal EEPROM. It is
possible to program different transducers which are in parallel to
the same supply voltage individually.
The CUR 3105 is programmable by modulating the supply voltage.
No additional programming pin is needed. The easy programmability
allows a 2-point calibration by adjusting the output voltage directly to the input signal (current). Individual adjustment of each transducer during the customer’s manufacturing process is possible. With this calibration procedure, the tolerances of the IC and the mechanical positioning can be compensated in the final assembly.
The calculation of the individual IC characteristics and the programming of the EEPROM memory can easily be done with a PC
and the application kit from Micronas.
The CUR 3105 is available in the very small leaded package
TO92UT and will be available in SMD package SOIC8 in 2011/
Q II.

Features

» Wide current range from ±1500A

» Frequency up to 1kHz

» Total error of transducer depending on settings below 1%

» Flux concentrator or special PCB design tailored to application

   may be needed

» Contactless measurement

» Wide temperature range from Tj: -40°C ... +170°C