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L9678P Datasheet(PDF) 176 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag and battery cut-off IC
PDF  215 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 176 Page - STMicroelectronics

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Electrical characteristics
L9678P, L9678P-S
176/216
DS11626 Rev 9
16.2
Internal analog reference
All electrical characteristics are valid for the following conditions unless otherwise noted.
-40 °C  Ta  +95 °C, VINGOOD1(max)  VIN  35 V.
Table 15. Configuration and control AC specifications
No
Symbol
Parameter
Condition
Min.
Typ.
Max. Units
1
TFLT_VBATMONTH
VBATMON thresholds
deglitch filter time
-
26
30
34
µs
2
TFLT_VINTH
VIN thresholds deglitch filter
time
-
3
3.5
4
µs
3
TFLT_WAKEUP
Wakeup deglitch filter time
-
0.95
1.05
1.15
ms
4
TLATCH_WAKEUP Wakeup latch time
-
9.7
10.8
11.9
ms
5
tdon
Power-up delay time –
Wake-up to RESET released -
-
-
10
ms
Table 16. Open ground detection DC specifications
N°
Symbol
Parameter
Condition
Min. Typ. Max. Unit
1
GNDAOPEN
GNDA threshold
GNDSUBx=0
100
200
300
mV
2
GNDDOPEN
GNDD threshold
GNDSUBx=0
100
200
300
mV
3
BSTGNDOPEN BSTGND threshold
GNDSUBx=0
100
200
300
mV
4
IPU_BSTGND
BSTGND pull-up
current
-
80
120
160
µA
Table 17. Open ground detection AC specifications
N°
Symbol
Parameter
Condition
Min. Typ. Max. Unit
1
TFLT_GNDREFOPEN
GNDA and GNDD
Open Deglitch Filter
Time
-
7
11
16
µs
2
TFLT_BSTGNDOPEN
BSTGND Latch Filter
Time
-
1.9
2.3
2.7
µs
Table 18. Internal analog reference
N°
Symbol
Parameter
Condition
Min. Typ.
Max.
Unit
1
VBG1
Bandgap reference
-
-1%
1.2
+1%
V
2
VBG2
Bandgap monitor
-
-1%
1.2
+1%
V
3
VADC_GROUND ADC Ground reference
ADC total error included
90
103
120
mV
4
VADC_FULLSCALE ADC Full scale reference -
-1.5% 2.5
+1.5%
V



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