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L9680 Datasheet(PDF) 226 Page - STMicroelectronics

Part # L9680
Description  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  286 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Datasheet(HTML) 226 Page - STMicroelectronics

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Temperature sensor
L9680
226/286
DS11615 Rev 7
15
Temperature sensor
The L9680 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 the specification tables.
T C
180
220
1.652
---------------
ADCREF
2
ADCRES
------------------------ DIAGCTRLn ADCRESn
0.739
–
–
=



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