AK8975 Datasheet, PDF (8/34 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK8975/C]
5.3.2. AC Characteristics
Parameter
Symbol Pin
Condition
Min.
Typ. Max. Unit
Power supply rise time
tPUP VDD Period of time from
200
µs
(Note 7)
10%Vdd to 90%Vdd
(Note 8)
Power-down mode transit
VDD Period of time from
100
µs
time (Note 7)
90%Vdd at power-on to
Power-down mode
Wait time before mode
setting
Twat
100
μ^s
(Note 7) Reference value for design
(Note 8) Only when VDD meets this condition, POR circuit starts and resets AK8975/C. After reset, all registers are
initialized and AK8975/C transits to Power-down mode.
tPUP
90%Vdd
10%Vdd


5.3.3. Analog Circuit Characteristics
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Measurement data output bit
DBIT
13
bit
Time for measurement
TSM Single measurement mode
7.3
9
ms
Magnetic sensor sensitivity
BSE _{Tc=25°C (Note 9)}
0.285 0.3 0.315 _μT/LSB
Magnetic sensor measurement ^{BRG Tc=25°C (Note 9)}
±1229
μ^T
range (Note 10)
Magnetic sensor initial offset
Tc=25°C
-1000
+1000 LSB
(Note 11)
(Note 9) Value after sensitivity is adjusted using sensitivity fine adjustment data stored in Fuse ROM. (Refer to
8.3.11 for how to adjust.)
(Note 10) Reference value for design
(Note 11) Value of measurement data register on shipment without applying magnetic field on purpose.
MS1187-E-02
-8-
2010/05