AK8996 Datasheet, PDF (14/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

[AK8996/W]
7) Power-Up and Standby Exit Time
Unless otherwise specified, VDD = 2.2 to 5.5V, Temperature = -40 to 105ºC, register default
Item
Symbol Min. Typ. Max. Units
Comments
See Functional Description 9)
Power-up time
Tvdd
200 µsec Note on the AK8996
Power-up
Standby exit time
Tvdst 10
nsec
Standby rise time
Tstbr
10 nsec
Standby fall time
Tstbf
10 nsec
Standby valid time
Tidle1 1
Tidle2 30
msec
msec VDD pin voltage<0.1*VDD
VOUT output rise
time
Tvout
20
µsec
VO pin external
capacitance<0.1µF
AGND output rise
time
Tvgnd
150
250
µsec
AGND pin external
capacitance: 10nF
Settling time for
stable analog
operation
Tenable1
Tenable2
280 465 µsec
350 495 µsec
Note) Design reference value; no production test performed.
STBYN pin unused (STBYN=VDD) Note)
STBYN pin used
0.8*VDD
VDD pin voltage
(=STBYN pin voltage)
0.1*VDD
Normal
operation
0.8*VDD
0.1*VDD
0.8*VDD
VDD pin voltage
Tstbf
VOUT pin voltage
Tvdd Tenable1
Hi-Z
Tidle2
Tvout
0.45*VDD
0.5*VDD
AGND pin voltage
Tvgnd
0.45*VDD
0.5*VDD
STBYN pin voltage
Tvdst
0.7*VDD
0.3*VDD
0.7*VDD
0.3*VDD
Tstbr
Tenable2
Normal
operation
0.7*VDD
Tidle1
Note) When recycling the power with the VDD and
STBYN pins connected, ensure that the supply voltage is
below 0.1*VDD to enable the power on reset.
8) Pressure Determination Circuit (Pressure Judge)
Unless otherwise specified, VDD = 2.2 to 5.5V, Temperature = -40 to 105ºC, register default
Item
Symbol
Conditions
Min.
Typ.
Max. Units Comments
Pressure judge
threshold
Vjudi
Unadjusted
AM[3:0]:9h DET
output
0.48*VDD 0.5*VDD 0.52*VDD V DET pin
With respect to Vjudi
Pressure judge Vjud+ Max:
0.95*VDD
V DET pin
threshold
EPJLV[9:0]=23Eh
adjustment
With respect to Vjudi
range
Vjud- Min:
0.05*VDD
V DET pin
EPJLV[9:0]=1C2h
Adj. Step
Vjstp
0.001
*VDD
V DET pin
Output ref. voltage=
Pressure judge
threshold
VOUT
Selected _{ST2N, ST1NS, ST1N}
Registers
ST2P, ST1PS, ST1P
ST2N, ST1NS, ST1N
MS1055-E-02
14
2011/12