L9679E datasheet(94/127 Pages) STMICROELECTRONICS

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L9679E датащи(PDF) 94 Page - STMicroelectronics

номер детали	L9679E

подробное описание детали	Automotive battery cut-off circuit and airbag system expansion IC

PDF	127 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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94 / 127 page

Temperature sensor

The L9679E provides an internal analog temperature sensor. The sensor is aimed at having a reference for the

average junction temperature on the 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 14. Diagnostics control register (DIAGCTRLx). The formula to calculate

temperature from ADC reading is the following one:

T(°C)=180− 2201.652 × ADCREF

2ADCRES×DIAGCTRLn(ADCRESn) −0.739 @DIAGCTRLn(ADCREQn)=0Aℎex

All parametric requirements for this block can be found in specification tables.

L9679E

Temperature sensor

DS12485 - Rev 8

page 94/127

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