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L9788 Datasheet(PDF) 138 Page - STMicroelectronics

Part # L9788
Description  Multifunction IC for automotive engine management system
PDF  264 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9788 Datasheet(HTML) 138 Page - STMicroelectronics

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Inductive sensor interface
L9788
138/264
DS12308 Rev 4
according to the new selection programmed) not synchronized with any VRS_FB zero
crossing.
11.2.2
VRS_A - Manual Hysteresis
To set the manual hysteresis on VRS_A configuration, bit VRS_MODE[0] has to be
configured at '0'. Hysteresis value is manually set through VRS_HYST[2:0] of CONFIG-
REG 8 according to Table 58. Such hysteresis is fixed until a new SPI programming occurs.
Default hysteresis current after exiting reset is HI3.
New MSC current value is updated during HYST CURRENT OFF phase that means the
output comparator is high.
Table 58. VRS_A hysteresis value
Hysteresis
current [H]
Min
Typ
Max
Unit
Correspondent value on
20 kΩ ext. resistor
Unit
HI1
3
5
7
µA
100
mV
HI2
7.5
10
13.5
µA
200
mV
HI3
13
17
23
µA
347
mV
HI4
23
32
40
µA
644
mV
HI5
35
51
60
µA
1020
mV
No Hyst
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