MLX90251 Datasheet, PDF (7/22 Pages) Melexis Microelectronic Systems – Programmable Linear Hall Effect Sensor

MLX90251
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 MLX90251 has many programmable features for adjusting the output characteristic. 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
Internal Bias Point
AGND
Coarse adjustment of VOQ.
Analog Clock Choice^†
CKANACH Adjustment for amplifier clock generator.
Clamping High
CLAMPHIGH Adjustment of upper output clamping voltage.
Clamping Low
CLAMPLOW Adjustment of lower output clamping voltage.
Customer ID^††
CUSTID Open bits for customer’s ID programming.
Offset Drift^†
DRIFT
VOQ temperature drift compensation.
EEPROM Fault Level
FAULTLEV Output state for EEPROM parity error.
Fine Gain
FG
Fine adjustment for Sensitivity.
Filter
FILTER
Adjustment for low pass output filter.
Invert Slope
INVERT
Sensitivity polarity selection.
Memory Lock
MEM_LOCK Used to lock the entire EEPROM.
Melexis ID^†
MLX_ID
Melexis IC identification number.
Melexis Lock^†
MLX_LOCK Used to lock Melexis area of the EEPROM.
Output Driver^†
MODE
Adjustment for output stage amplifier.
Offset DAC
OFFSET Fine adjustment of VOQ.
Oscillator Adjust^†
OSCADJ Chip oscillator frequency adjustment.
EEPROM Parity
PARITY
Ensures the integrity of the EEPROM data.
Rough Gain
RG
Rough adjustment for Sensitivity.
Slow^†
SLOW
Amplifier speed adjustment.
Temperature
TCW
Compensation Window
Range adjustment for Sensitivity Temperature
Compensation.
Temperature
Compensation
TC
Fine adjustment of Sensitivity Temperature
Compensation.
2nd Order Temperature TC²
Linearization adjustment of the Sensitivity
Compensations
Temperature Compensation.
Table 7: Programmable Parameters
†_{Melexis parameter adjusted at final test.}
††_{Not included in redundant area of the EEPROM.}
Number of Bits Default
10
Trimmed
2
Preset
10
512
10
512
24
Preset
4
Trimmed
1
0
10
0
4
0
1
0
1
0
Preset
1
0
2
1
10
0
4
Preset
3
Calculated
4
0
1
Preset
3
0
5
0
6
0
3901090251
Rev 009
Page 7 of 22
Data Sheet
Nov/06