MLX90251

Programmable Linear Hall Effect Sensor

3901090251

Page 5 of 20

Data Sheet

Rev 012

Oct/2012

5 Detailed Block Diagram

Figure 5-1 Detailed Block Diagram

5.1 Detailed Description

Integrated on the MLX90251 is a temperature-compensated quad switched Hall plate, chopper stabilized

amplifiers, adjustable output filter, output driver, voltage protection circuitry and a programmable EEPROM

with security and redundancy. Programming the EEPROM allows each device to be calibrated in the

application.

In normal operation data stored in the EEPROM feeds a register, RAM, that updates internal DACs and

switches that effect the operation of the device. In programming mode the RAM can be directly accessed to

allow faster calibration of the parameters. Communication to the device is done using Melexis' PTC serial

interface.