전자부품 데이터시트 검색엔진 |
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MLX91209 데이터시트(PDF) 8 Page - Melexis Microelectronic Systems |
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MLX91209 데이터시트(HTML) 8 Page - Melexis Microelectronic Systems |
8 / 15 page MLX91209CA Current Sensor IC in VA package 390109120901 Page 8 of 15 MLX91209 Rev 010 March 2016 Programmable items Parameter table Parameter Bits Comment VOQ[11:0] 12 Quiescent output level (0 gauss) adjustment RG[2:0] 3 Rough gain adjustment FG[9:0] 10 Fine gain adjustment ENRATIO 1 Ratiometry enablement TC1[7:0] 8 First order temperature compensation of the magnetic sensitivity TC2HOT[4:0] 5 Extra temperature compensation of the magnetic sensitivity at high temperature TC2COLD[4:0] 5 Extra temperature compensation of the magnetic sensitivity at low temperature OFFDR2C[5:0] 6 Adjustment of the offset drift at low temperature after the VGA OFFDR2H[5:0] 6 Adjustment of the offset drift at high temperature after the VGA NOISEFILT 1 Noise filter enablement CRC[15:0] 16 16-bit CRC for the checksum calculation of the configuration register. ID[47:0] 48 Customer identification code Table 7: Customer programmable items Sensitivity programming (RG, FG) The sensitivity can be programmed from 5 to 150 mV/mT, with the ROUGHGAIN (3 bits) and FINEGAIN (10 bits) parameters. Offset / output quiescent voltage programming (VOQ) The offset is programmable with 12 bits in 1.5 mV steps over the full output range. This corresponds to a calibration resolution of 0.03 %VDD. (The typical step would be 5V/4096 = 1.22 mV, the actual step size can differ from the nominal value because of internal gain tolerance. The maximum step size of 1.5 mV is guaranteed). Note: for optimal performance over temperature, VOQ should be programmed in the range 2 to 3V. Output ratiometry (ENRATIO) The ratiometry of the output versus the supply can be disabled by setting this bit to 0. Note: for optimal performance over temperature, ratiometry should always be enabled (ENRATIO=1). Sensitivity temperature drift programming (TC1, TC2COLD, TC2HOT) First order sensitivity temperature drift can be trimmed from -2000 to 2000ppm/K with TC1. The programming resolution is 40ppm/K. Second order sensitivity temperature drift can be trimmed from TC2COLD and TC2HOT. The programming resolution is 2ppm/K 2 for TC2COLD and 0.6ppm/K2 for TC2HOT.The second order can also be seen as third order correction since cold and hot sides are independently adjusted. Note: for optimal performance over temperature, the first order sensitivity drift compensation (TC1ST) should not exceed ±500ppm/K. |
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