AK7451 Datasheet, PDF (7/32 Pages) Asahi Kasei Microsystems – zero latency angle sensor ic

[AK7451]
9. Electrical and Magnetic Characteristics
Table 6 . Electrical and Magnetic Characteristics
Conditions（unless otherwise specified）: Ta=-40 to 125ºC, V_DD=4.5 to 5.5V
Parameter
Symbol
Conditions
Min. Typ.
Magnetic Flux
Density Range
Angle Detection
Range
Angle Resolution
Angle Linearity Error
(Note 1)
Thermal Angle Drift
B_RANGE
A_RANGE
A_RES
A_INL
A_DRIFT
12bit
at 25ºC
Operating temperature range
(with reference to 25ºC)
30
50
0
0.088
-0.6
-0.9
Angle hysteresis
Width
A_HYS
at 25ºC
Output noise
H_NOISE
at 50mT
-2
Angle Tracking
Ability
F_SAMP
Angle Output Delay
Time (Note 2)
T_D
at ABZ hysteresis configuration
=”Invalid”
Power On Time
(Note 3)
T_STO
Supply current
I_SUP
No Output Load
25
12.7
Max.
70
+0.6
+0.9
0.3
2
20000
1.8
30
15.7
Unit
mT
deg3. ₅
deg.
deg.
deg.
deg.
LSB
rpm
µs
ms
mA
Note 1. If ABZ resolution configuration is set to other than exponentiation of 2, the father angle linearity
error is added to the specified value in 0 to 1LSB (0 to 0.088degree).
Note 2. This value is in case that ABZ hysteresis configuration is set to “Invalid”. This value is dependent
on ABZ hysteresis configuration. Whenever the setting value is increased, the angle output delay time
value increases by 0.5µs at a time.
Note 3. It is the time from Power-On to becoming high on ERROR pin through judging magnetic flux
range error and tracking error. This time is including the circuit setup time, the tracking angle time, the
self-diagnosis of error time. This parameter is not tested at mass production.
4.5V
VDD
ERROR PIN
Power on time TSTO
Time
Figure 3. Waveform of VDD and ERROR pin at start-up
016006637-E-00
-7-
2016/05