L9678P datasheet(167/203 Pages) STMICROELECTRONICS

167 / 203 page

DocID029274 Rev 3

167/203

L9678P, L9678P-S

Electrical characteristics

202

15.2

Internal analog reference

All electrical characteristics are valid for the following conditions unless otherwise noted.

-40 °C

 Ta  +95 °C, VINGOOD1(max)  VIN  35 V.

Table 14. Configuration and control AC specifications

Symbol

Parameter

Condition

Min

Typ

Max

Units

1TFLT_VBATMONTH

VBATMON thresholds

deglitch filter time

-26

µs

2TFLT_VINTH

VIN thresholds deglitch filter

time

3.5

µs

3TFLT_WAKEUP

Wakeup deglitch filter time

0.95

1.05

1.15

4TLATCH_WAKEUP Wakeup latch time

9.7

10.8

11.9

5tdon

Power-up delay time –



Wake-up to RESET released

Table 15. Open ground detection DC specifications

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

GNDAOPEN

GNDA threshold

GNDSUBx=0

100

200

300

2GNDDOPEN

GNDD threshold

GNDSUBx=0

100

200

300

BSTGNDOPEN

BSTGND threshold

GNDSUBx=0

100

200

300

4IPU_BSTGND

BSTGND pull-up

current

120

160

µA

Table 16. Open ground detection AC specifications

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

1TFLT_GNDREFOPEN

GNDA and GNDD

Open Deglitch Filter

Time

-7

µs

2TFLT_BSTGNDOPEN

BSTGND Latch Filter

Time

1.9

2.3

2.7

µs

Table 17. Internal analog reference

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

1VBG1

Bandgap reference

-1%

1.2

+1%

2VBG2

Bandgap monitor

-1%

1.2

+1%

3VADC_GROUND

ADC Ground reference

-3%

103

+3%

4VADC_FULLSCALE ADC Full scale reference -

-1.5%

2.5

+1.5%

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