hey...
searching TI components for required design is very easy and efficient. I wanna say thanks TI for this very easy and useful interface...I was looking for a high accuracy 24 bit ADC for temperatrure measurment with RTD(PT100) and endup my search when i came across the IC LMP90100. i read the datasheet and various technical notes provided with it. i found it a complete solution for my design but i think i'll need a thorogh study of how to interface this IC with my arduino mega 2560 board. so i thought to ask TI before i move ahead with it. there are many questions in my mind(some must be very silly) like--
what are this registers in the IC and how can i configure them with a microcontroller's digital Io pins.Are The timing digram provided in the datasheet, the way to programme this registers???please give a brief procedure to confuguration of this registers in contrast to arduino like MCU.
the IC has 4 diffrential IO analog pins for sensor interfaing so can i use 4 PT100 in 4 wire configuration with common current source (IB1 or IB2) AND COMMON Rref as only one sensor at a time gets xcitation current.
what exactly background calibration means?? does it mean by conevrting the RTd measured voltage to temperature through RTD equation??or it mean the elemenation of the error caused by drift in IDAC and Rref.
please help me in how to use this IC for interfacing 4 RTD's with 4 or 3 wire modes for accurate measurement with an arduino meag2560 board.