AK7451 Datasheet, PDF (23/32 Pages) Asahi Kasei Microsystems – zero latency angle sensor ic

[AK7451]
d) ABZ hysteresis configuration: This configuration can be used to prevent unexpected ABZ
pulses under noise influence. Relation between ABZ hysteresis and ABZ_HYS set value is as
following.
ABZ Hysteresis
E_ABZ_HYS[2:0]
Default
Invalid
0x0
0LSB
0x1
1LSB
0x2, 0x5, 0x6, 0x7
●
2LSB
0x3
3LSB
0x4
Figure 8. Operational Overview of Hysteresis Configuration
Note 17. As to the difference of ABZ hysteresis between “0LSB” and “Invalid”;
Internal angle data always alternates between two adjacent angle data because of the tracking loop
characteristics even if the environment is a static condition.
In “Invalid” configuration, ABZ output is reflected by internal angle data directly.
But in “0LSB” configuration, ABZ output is reflected by internal angle data when internal angle data
change over two consecutive LSB in same rotation direction.
Thus in this case, LSB bit alternation caused by noise is masked from ABZ output.
016006637-E-00
- 23 -
2016/05