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L7250 датащи(PDF) 41 Page - STMicroelectronics

номер детали L7250
подробное описание детали  5V & 12V SPINDLE AND VCM MOTORS DRIVER
PDF  46 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7250 датащи(HTML) 41 Page - STMicroelectronics

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L7250
4.5 Shock Sensor
This block takes input from a piezoelectric or charging mode shock sensor element (selectable using the SPI
bit ShockConf -> Reg02H, bit 7 ), and includes external filtering capability. A digital latched signal is available
on SkDout pin if the Sken bit (from SPI) is set to 1 otherwise the SkDout pin is transparent to the shock signal.
If the output signal has been latched, a pulse to zero of the Sken bit it is necessary to clear it.
The shock sensor element will be connected to the Skin and VREF25.
Figure 19. Piezoelectric Shock Sensor typical application block diagram (Reg02H->bit7=0)
Figure 20. Charging Shock Sensor typical application block diagram (Reg02H->bit7=1)
24 SkO ut
26
Sk F o u t
25 SkF in
V ref25+ V thH
V ref25-V thL
0
1
S
R
27
Sk D o u t
21
Vre f2 5
23
Sk in
R
9R
Vref25
S kE n (fro m S PI)
R1 e x t
C1 ex t
C2 ex t
R2 ex t
10M
24 SkO ut
26
S k F out
25 SkFin
V ref25+V thH
V ref25-V thL
0
1
S
R
27
S k D out
21
Vre f2 5
23
Sk in
Vref25
S kE n (from SP I)
R1 ex t
C1 ex t
C2 ex t
R2 e x t
Vref25
CSex t
RSex t



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