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L9679P Datasheet(PDF) 265 Page - STMicroelectronics

No. de pieza L9679P
Descripción Electrónicos  Automotive advanced airbag IC for mid/high end applications
PDF  272 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 265 Page - STMicroelectronics

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L9679P
Electrical characteristics
271
17.24
Voltage diagnostics (Analog MUX)
All electrical characteristics are valid for the following conditions unless otherwise noted:
40 °C
 Ta  +95 °C, VINGOOD0  VIN  35V.
14
T_TSC
Single conversion time
-
-
2.25
-
μs
15
IQ
Intra-queue settling time
-
-
3.5
-
μs
16
Post-ADC
Post- ADC settling time
-
-
3.44
-
μs
17
-
ADC conversion time -
voltage
4x sampling for each of the 4
conversions in the queue
Design Info
-
54.75
-
μs
18
-
ADC conversion time –
current and voltage
8x sampling for DCS,
temperature and squib loop
resistance measurements + 4x
sampling for remaining 2
conversions in the queue
Design Info
-
51.25
-
μs
1. LSB = (2.5V / 1024) = 2.44mV
Table 70. Analog to digital converter (continued)
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 71. Voltage diagnostics (Analog MUX
No
Symbol
Parameter
Conditions
Min
Typ
Max
Units
1
Ratio_1
Divider ratios
VIN_RANGE_1 = 0.1 V to 2.5 V
-
1
-
V/V
2
Ratio_4
VINPUT_RANGE_4 = 1 V to 10 V
-3%
4
+3%
V/V
3
Ratio_7
VINPUT_RANGE_7 = 1.5V to
17.5V
-3%
7
+3%
V/V
4
Ratio_10
VINPUT_RANGE_10 = 2 V to 25 V
-3%
10
+3%
V/V
5
Ratio_15
VINPUT_RANGE_15 = 3 V to 35 V
-3%
15
+3%
V/V
6
Offset
Divider Offset
High impedance
-10
-
10
mV
7RRATIO_4
Multiplexer input
resistance
Multiplexer input to GNDA
80
-
-
kΩ
8RRATIO_7
Multiplexer input to GNDA
120
-
-
kΩ
9RRATIO_10
Multiplexer input to GNDA
160
-
-
kΩ
10
RRATIO_15
Multiplexer input to GNDA
200
-
-
kΩ
11
ILEAK_MUX_ON
Additional multiplexer
on-state input leakage
current
For all divider ratio expect
ratio_1
--
60
μA



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