L9679P datasheet(227/279 Pages) STMICROELECTRONICS

227 / 279 page

DS11627 Rev 7

227/279

L9679P

Electrical characteristics

278

18.2

Internal analog reference

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

-40 °C ≤ Ta ≤ +95 °C

VINBAD0(min) ≤ VIN ≤ 35 V

Table 23. Open ground detection DC specifications

Symbol

Parameter

Conditions / Comments

Min Typ Max Unit

1 GNDAOPEN

GNDA open threshold

GNDSUBx=0

100 200 300

2 GNDDOPEN

GNDD open threshold

GNDSUBx=0

100 200 300

3 BSTGNDOPEN BSTGND open threshold

GNDSUBx=0

100 200 300

4 IPU_BSTGND

BSTGND pull-up current

ER BOOST OFF and SYNC

BOOST OFF

130

270

µA

5 SATGNDOPEN SATGND open threshold

GNDSUBx=0

100 200 300

6 IPU_SATGND

SATGND pull-up current

SATBUCK OFF

120 160

µA

7 VCCGNDOPEN VCCGND open threshold

GNDSUBx=0

100 200 300

8 IPU_VCCGND

VCCGND pull-up current

VCC BUCK OFF

120 160

µA

Table 24. GND_OPEN_AC - Open ground detection DC specifications

Symbol

Parameter

Condition

Min Typ Max Unit

1 TFLT_GNDREFOPEN

GNDA and GNDD Open

Deglitch Filter Time

µs

2 TFLT_GNDREGOPEN

BSTGND, SATGND,

VCCGND Open Deglitch

Filter Time

1.9

2.3

2.7

µs

Table 25. Internal analog reference

N°

Symbol

Parameter

Condition

Min

Typ

Max

Unit

VBG1

Bandgap reference

-1%

1.2

+1%

VBG2

Bandgap monitor

-1%

1.2

+1%

VADC_GROUND ADC Ground reference

ADC total error included

104

120

VADC_FULLSCALE ADC Full scale reference -

-1.5%

2.5

+1.5%

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