سنسور و مبدل سنسور جریان

Product Attributes

Introduction

CUR 3105 is a Hall-effect-based current sensor designed for high-precision current measurement. The output voltage is proportional to both the measured current and the supply voltage (ratiometric analog output). Key characteristics — such as magnetic field range, sensitivity, output quiescent voltage (output voltage at B = 0 mT), and output voltage range — are programmable and stored in an internal EEPROM. Different sensors connected in parallel to the same supply voltage can be programmed individually.

CUR 3105 integrates a temperature-compensated Hall plate with chopper offset compensation, an A/D converter, digital signal processing, a D/A converter with output driver, EEPROM memory with redundancy and lock features (for storing calibration data), EEPROM for storing customer serial numbers, a serial programming interface, and protection circuitry on all pins. The internal digital signal processing is highly beneficial, as analog offset, temperature drift, and mechanical stress do not degrade sensor accuracy.

CUR 3105 is programmed via supply voltage modulation, requiring no additional programming pins. The easy-to-program feature allows two-point calibration by directly adjusting the output voltage to the input signal (current). Each sensor can be individually calibrated during the customer's manufacturing process. This calibration procedure enables compensation of IC and mechanical positioning tolerances in the final assembly.

Calculation of individual IC characteristics and EEPROM programming can be conveniently performed using a PC and the Micronas application kit.

The sensor is designed for industrial, white goods, and automotive applications, typically operating at a 5V supply voltage with a junction temperature range of -40°C to 170°C. CUR 3105 is available in the compact leaded package TO92UT and the SMD package SOIC8.

Features

• High-precision current sensor with ratiometric output and digital signal processing
• Low output voltage drift over temperature
• 12-bit analog output
• Multiple programmable magnetic characteristics in non-volatile memory (EEPROM) with redundancy and lock functionality
• Open-circuit (GND and supply line break detection) with 5kΩ pull-up and pull-down resistors, featuring overvoltage and undervoltage detection
• Single sensor programming among multiple ICs connected in parallel to the same supply voltage, selectable via output pin
• Programmable clamp functionality
• Programming via modulated supply voltage
• Junction temperature range: -40°C to 170°C
• Meets specifications at 4.5V to 5.5V supply voltage, operable up to 8.5V
• Operates in static and dynamic magnetic fields up to 1kHz
• Overvoltage and reverse voltage protection on all pins
• Magnetic characteristics highly robust against mechanical stress
• Short-circuit protected push-pull output
• EMC and ESD optimized design

Applications

Industrial, White Goods, and Automotive Applications