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MLX91209 데이터시트(PDF) 8 Page - Melexis Microelectronic Systems

부품명 MLX91209
상세설명  Current Sensor IC in VA package
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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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