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L9678P Folha de dados(PDF) 164 Page - STMicroelectronics

Nome de Peças L9678P
Descrição Electrónicos  Automotive user configurable airbag IC
PDF  203 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Folha de dados(HTML) 164 Page - STMicroelectronics

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Temperature sensor
L9678P, L9678P-S
164/203
DocID029274 Rev 3
14
Temperature sensor
The L9678P provides an internal analog temperature sensor. The sensor is aimed to have a
reference for the average junction temperature on silicon surface. The sensor is placed far
away from power dissipating stages and squib deployment drivers. The output of the
temperature sensor is available via SPI through ADC conversion, as shown in Table 11. The
formula to calculate temperature from ADC reading is the following one:
T
C

180
220
1.652
---------------


ADCREF_hi
2
ADCRES
------------------------------- DIAGCTRLn ADCRESn




0.739
–



–
=
@ DIAGCTRLn(ADCREQn) = 0Ahex
All parametric requirements for this block can be found in specification tables.



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