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L9966 Datasheet(PDF) 71 Page - STMicroelectronics

Part # L9966
Description  FlexInput IC for automotive applications
PDF  122 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9966 Datasheet(HTML) 71 Page - STMicroelectronics

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The interface handles signals coming from magnetic pick-up sensors, see Figure 40. Variable reluctance sensor
(VRS), or Hall Effect sensors with two possible configurations, as per Figure 41. Hall effect sensor configuration 1
and Figure 42. Hall effect sensor configuration 2.
The interface feeds the digital signal to microcontroller that extracts flying wheel rotational position, angular speed
and acceleration.
Figure 40. Variable reluctance sensor (VRS)
VRSP
VRSN
To µC
470 pF
10 kΩ
470 pF
10 kΩ
Ls
Rs
VRS
VRS +
VRS -
Sensor
OUT_VRS
ECU
SMART
VRS
L9966
ω
GADG1501181110PS
L9966
Application circuit
DS12459 - Rev 10
page 71/122



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