MLX90277
Dual Programmable Linear Hall Effect Sensor
† Valid for Rough Gain within the specified option code.
†† ∆L = Life Time Drift (based on HTOL data [1000 hours @ 150°C]).
∆T = Thermal Drift.
(1)ꢀFor other test conditions, please contact the Melexis Sales representative of your area.
10 Programmable Features
The MLX90277 has many programmable features for adjusting the output characteristics. The parameters
are independently programmable for IC A and IC B. The features are utilized by writing data into the
redundant non-volatile EEPROM. Below is a quick list and description of all the programmable parameters.
Many of the parameters are set by Melexis and they are not used by the end customer. Later sections of the
data sheet give details on how the parameters are used.
Parameter
Symbol
Description
Number of Default
Bits IC_A
Trimmedꢀ
Default
IC_B
InternalꢀBiasꢀPointꢀ
AnalogꢀClockꢀChoice†ꢀ
ClampingꢀHighꢀ
AGNDꢀ
CoarseꢀadjustmentꢀofꢀVOQ.ꢀꢀꢀ
10ꢀ
2ꢀ
Trimmedꢀ
CKANACHꢀ Adjustmentꢀforꢀamplifierꢀclockꢀgenerator.ꢀꢀ
Presetꢀ
768ꢀ
Presetꢀ
256ꢀ
CLAMPHIGHꢀ Adjustmentꢀofꢀupperꢀoutputꢀclampingꢀ
voltage.ꢀꢀ
10ꢀ
ClampingꢀLowꢀ
CLAMPLOWꢀ Adjustmentꢀofꢀlowerꢀoutputꢀclampingꢀ
voltage.ꢀꢀꢀ
10ꢀ
768ꢀ
256ꢀ
CustomerꢀID††ꢀ
OffsetꢀDrift†ꢀ
EEPROMꢀFaultꢀLevelꢀ
FineꢀGainꢀ
CUSTIDꢀ
DRIFTꢀ
Openꢀbitsꢀforꢀcustomerꢀprogramming.ꢀꢀ
VOQꢀtemperatureꢀdriftꢀcompensation.ꢀꢀꢀ
24ꢀ
4ꢀ
1ꢀ
10ꢀ
4ꢀ
1ꢀ
1ꢀ
ꢀ
Presetꢀ
Presetꢀ
Trimmedꢀ
Trimmedꢀ
FAULTLEVꢀ OutputꢀstateꢀforꢀEEPROMꢀparityꢀerror.ꢀ
0ꢀ
0ꢀ
FGꢀ
FineꢀadjustmentꢀforꢀSensitivity.ꢀ
Adjustmentꢀforꢀlowꢀpassꢀoutputꢀfilter.ꢀ
Sensitivityꢀpolarityꢀselection.ꢀ
0ꢀ
0ꢀ
Filterꢀ
FILTERꢀ
INVERTꢀ
0ꢀ
0ꢀ
0ꢀ
0ꢀ
InvertꢀSlopeꢀ
MemoryꢀLockꢀ
MelexisꢀID†ꢀ
MEM_LOCKꢀ UsedꢀtoꢀlockꢀtheꢀentireꢀEEPROM.ꢀ
MLX_IDꢀ MelexisꢀICꢀidentificationꢀnumber.ꢀꢀꢀ
MLX_LOCKꢀ UsedꢀtoꢀlockꢀMelexisꢀareaꢀofꢀtheꢀEEPROM.ꢀꢀ
0ꢀ
0ꢀ
Presetꢀ
0ꢀ
Presetꢀ
0ꢀ
MelexisꢀLock†ꢀ
OutputꢀDriver†ꢀ
OffsetꢀDACꢀ
OscillatorꢀAdjust†ꢀ
EEPROMꢀParityꢀ
RoughꢀGainꢀ
Slow†ꢀ
1ꢀ
2ꢀ
10ꢀ
4ꢀ
3ꢀ
4ꢀ
1ꢀ
3ꢀ
MODEꢀ
OFFSETꢀ
OSCADJꢀ
PARITYꢀ
RGꢀ
Adjustmentꢀforꢀoutputꢀstageꢀamplifier.ꢀꢀꢀ
FineꢀadjustmentꢀofꢀVOQ.ꢀ
1ꢀ
1ꢀ
0ꢀ
0ꢀ
Chipꢀoscillatorꢀfrequencyꢀadjustment.ꢀꢀꢀ
EnsuresꢀtheꢀintegrityꢀofꢀtheꢀEEPROMꢀdata.ꢀ
RoughꢀadjustmentꢀforꢀSensitivity.ꢀ
Amplifierꢀspeedꢀadjustment.ꢀꢀꢀ
Presetꢀ
Presetꢀ
Calculatedꢀ Calculatedꢀ
0ꢀ
Presetꢀ
0ꢀ
0ꢀ
Presetꢀ
0ꢀ
SLOWꢀ
TCWꢀ
Temperatureꢀ
CompensationꢀWindowꢀ
RangeꢀadjustmentꢀforꢀSensitivityꢀ
TemperatureꢀCompensation.ꢀ
Temperatureꢀ
Compensationꢀ
TCꢀ
FineꢀadjustmentꢀofꢀꢀSensitivityꢀ
TemperatureꢀCompensation.ꢀꢀ
5ꢀ
6ꢀ
0ꢀ
0ꢀ
0ꢀ
0ꢀ
2ndꢀOrderꢀTemperatureꢀ TC2ꢀ
Compensationsꢀ
Table 7: Programmable Parameters
LinearizationꢀadjustmentꢀofꢀtheꢀSensitivityꢀ
TemperatureꢀCompensation.ꢀ
†Melexis parameter adjusted at final test.
††Not included in redundant area of the EEPROM.
3901090277
Rev 004
Page 7 of 21
Data Sheet
Nov/06
MELEXIS [ Melexis Microelectronic Systems ]
