AK8996 Datasheet, PDF (23/74 Pages) Asahi Kasei Microsystems – Pressure Sensor Interface IC

2. Operation Timing when the Self-Diagnosis Circuit is Valid (Pressure Detector Valid)
Self-Diagno sis ON (1 st tim e) Power supp ly variation adjusted and sen sitivity variation unadjuste d for STV
Self-diagno sis period
CLK (1=5 12 kHz )
A ppro x.4 0 0µ s ec
0
5
8
18
NO.
00
10
20
34
4
Status
Start Up
ST0 PJ0
ST V 4
VDD or STBYN
Press ju dge
ST V
S/H1 &2
VO UT
P. Sup ply var. adj.
Outp ut ref. vo ltag e ne ar 1/2 *VDD
(1st tim e) P. Sup ply var ad j., sen s. tem p. var
una djusted.
DET
MSR4
Self-Diagno sis ON (2 nd t im e) Init ial op eration fo r STV
CLK (1=5 12 kHz )
0
5
8
18
Pressure m easurem ent period
NO.
Status
VDD o r STBYN
Press ju dge
ST V
S/H1 &2
VO UT
DET
15
20
30
3
ST5 PJ0
ST V 0
P. Supp ly & Sen s
var. adj.
(2nd tim e) In itial opera tio n, (3rd time & a fter)
Normal op eration
VO UT ·( n- 1)
Ab normal: ”H”
MSR
MS1055-E-02
23
[AK8996/W]
50 51
14
ST4
VO UT ·( 1)
Abnorm al:
”H”
50 51
13
ST3
V O UT ·(n)
2011/12