HAL855
DATA SHEET
Table 4–1: Temperature compensation, continued
4.3. Measurement of a Biphase-M Output Signal
In order to read the Biphase-M signal Micronas sug-
gests to use a port interrupt which is configured to gen-
erate interrupts with both the falling and rising edge of
the incoming signal.
Typ. Temperature Coefficient TC
of Magnet (ppm/K)
TCSQ
180
16
15
14
13
12
11
1
1
1
2
2
2
2
2
2
3
3
3
3
3
4
4
4
4
5
5
5
6
6
6
7
7
8
8
9
9
9
With each interrupt a timer shall be read out. The first
two edges (SYNC bit) define the bit time tp0. Compar-
ing subsequent timer readouts with tp0 successively
decodes the Biphase-M pattern.
150
130
60
40
4.4. Temperature Compensation
10
The relationship between the temperature coefficient
of the magnet and the corresponding TC and TCSQ
codes for linear compensation is given in the following
table. In addition to the linear change of the magnetic
field with temperature, the curvature can be adjusted
as well. For this purpose, other TC and TCSQ combi-
nations are required which are not shown in the table.
Micronas also offers a software named TC-Calc to
optimize the TC and TCSQ values for each individual
application based on customer measurement results.
Please contact Micronas for more detailed information.
−20
10
9
−50
−70
8
−100
−180
−200
−230
−260
−280
−360
−390
−410
−490
−510
−540
−610
−640
−670
−740
−780
−840
−880
−950
−980
−1010
7
6
5
4
Table 4–1: Temperature compensation
3
Typ. Temperature Coefficient TC
of Magnet (ppm/K)
TCSQ
2
1
600
570
540
520
490
470
440
420
360
330
300
280
260
240
200
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
0
−31
−30
−29
−28
−27
−26
−25
−24
−23
−22
−21
−20
−19
−18
28
Nov. 26, 2008; DSH000149_003EN
Micronas
MICRONAS [ MICRONAS ]
