L9961 datasheet(26/65 Pages) STMICROELECTRONICS

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CSA total conversion error

TCE =TCE25°C+∆TCE∆TTAMB−25°C

TCE25°C= CSAOFFSETERR+CSAGAIN VISENSEP−VISENSEM

+CSAINLERR* VISENSEP−VISENSEM−VDIFFRANGE *VISENSEP−VISENSEM

VDIFFRANGE

2 2

∆TCE∆T=CSAOFFSETERRTHERMALDRIFT+CSAGAINERRTHERMALDRIFT*VISENSEP−VISENSEM

VDIFFRANGE

(5)

Figure 8. Current sense ADC total conversion error

GADG120820221205SA

0.000

200.000

400.000

600.000

800.000

1000.000

1200.000

1400.000

1600.000

1800.000

Differential input voltage [mV]

|TCE @25°C| [µV] (without post-calibration)

|TCE @25°C| [µV] (with post-calibration)

|TCE @85°C| [µV] (without post-calibration)

|TCE 85°C| [µV] (with post-calibration)

3.5.1.1

Electrical parameters

All parameters are tested and guaranteed in the following conditions, unless otherwise noted:

VB according to the operating range of Table 2; TJ according to the operating range of Table 5.

Table 18. Current sense ADC electrical parameters

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VDIFF_RANGE

ADC differential input range for

coulomb counting and overcurrent

monitor

ISENSEP-ISENSEM

Design info

-200

200

VDIFF_RANGE_EXT

ADC extended differential input

range for short-circuit in discharge

protection

ISENSEP-ISENSEM

Design info

300

VCM_RANGE

ADC common mode input range

(ISENSEP+ISENSEM)/2

Design info

-200

200

L9961

Current conversion routine

DS14012 - Rev 3

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