MLX90215_12 Datasheet, PDF (6/14 Pages) Melexis Microelectronic Systems – Position Programmable Linear Hall Effect Sensor

Diagnostic Characteristics
MLX90215
Position Programmable
Linear Hall Effect Sensor
Table 3 (left) illustrates the way the TC code affects the
sensitivity temperature drift. Also note in Table 3, the
overlap in TC codes. The numbers in the table represent
typical results and are for reference only. For accurate
results the TC code must be determined experimentally.
This TC code map applies to MLX90215’s with a first
line brand showing “215DB”
Special Note
The MLX90215 programmed with a zero TC code
(default) has a typical TC value between the range of –
300 to –600 ppm/oC. This means sensitivity will
decrease slightly as temperature increases. The slightly
negative initial TC value allows the MLX90215 to be
accurately programmed up to 0 TC. Almost all magnets
have a naturally negative TC code. The natural TC of a
magnet added with the initial negative TC value of the
MLX90215 could degrade linearity over a large
temperature span. Using a TC code of 6, 7, or 8 will
give the MLX90215 a slightly positive TC code.
Previous revisions of the MLX90215 with second line
brand of “15AXX” or “15DXX” should refer to factory
for TC code maps.
3901090215
Rev 008
Page 6 of 14
Nov/12