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L9679P Datasheet(PDF) 219 Page - STMicroelectronics

No. de pieza L9679P
Descripción Electrónicos  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  279 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 219 Page - STMicroelectronics

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DS11627 Rev 7
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L9679P
Temperature sensor
278
16
Temperature sensor
The L9679P provides an internal analog temperature sensor. The sensor is aimed at having
a reference for the average junction temperature on silicon surface. The sensor is placed far
away from power dissipating stages and squib/pyroswitch deployment drivers. The output of
the temperature sensor is available via SPI through ADC conversion, as shown in Table 18.
The formula to calculate temperature from ADC reading is the following one:
@ DIAGCTRLn(ADCREQn) = 0Ahex
All parametric requirements for this block can be found in specification tables.
T C
180
220
1.652
---------------
ADCREF
2
ADCRES
------------------------ DIAGCTRLn ADCRESn
0.739
–
–
=



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