MLX90251_12 Datasheet, PDF (8/20 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
Internal Bias Point
Analog Clock Choice^†
Clamping High
Clamping Low
Customer ID^††
Offset Drift^†
EEPROM Fault Level
Fine Gain
Filter
Invert Slope
Memory Lock
Melexis ID^†
Melexis Lock^†
Output Driver^†
Offset DAC
Oscillator Adjust^†
EEPROM Parity
Rough Gain
Slow^†
Temperature
Compensation Window
Temperature
Compensation
2nd Order Temperature
Compensations
Symbol Description
AGND
Coarse adjustment of VOQ.
CKANACH Adjustment for amplifier clock generator.
CLAMPHIGH Adjustment of upper output clamping voltage.
CLAMPLOW Adjustment of lower output clamping voltage.
CUSTID Open bits for customer’s ID programming.
DRIFT
VOQ temperature drift compensation.
FAULTLEV Output state for EEPROM parity error.
FG
Fine adjustment for Sensitivity.
FILTER
Adjustment for low pass output filter.
INVERT Sensitivity polarity selection.
MEM_LOCK Used to lock the entire EEPROM.
MLX_ID
Melexis IC identification number.
MLX_LOCK Used to lock Melexis area of the EEPROM.
MODE
Adjustment for output stage amplifier.
OFFSET Fine adjustment of VOQ.
OSCADJ Chip oscillator frequency adjustment.
PARITY
Ensures the integrity of the EEPROM data.
RG
Rough adjustment for Sensitivity.
SLOW
Amplifier speed adjustment.
TCW
Range adjustment for Sensitivity Temperature
Compensation.
TC
Fine adjustment of Sensitivity Temperature
Compensation.
TC²
Linearization adjustment of the Sensitivity
Temperature Compensation.
Table 7: Programmable Parameters
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
†_{Melexis parameter adjusted at final test.}
††_{Not included in redundant area of the EEPROM.}
3901090251
Rev 012
Page 8 of 20
Data Sheet
Oct/2012