7.9 Internal Temperature Sensor

Unless otherwise noted, characteristics noted under conditions of TA = –40℃ to 85℃

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(TEMP)

Internal temperature sensor voltage

drift

VTEMPP

1.65

1.73

1.8

mV/°C

VTEMPP – VTEMPN (assured by design)

0.17

0.18

0.19

7.10 NTC Thermistor Measurement Support

Unless otherwise noted, characteristics noted under conditions of TA = –40℃ to 85℃

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

RNTRC(PU)

Internal pullup resistance

14.4

18

21.6

kΩ

RNTC(DRIFT)

Resistance drift over

temperature

–250

–120

0

PPM/°C

7.11 Coulomb Counter (CC)

Unless otherwise noted, characteristics noted under conditions of TA = –40℃ to 85℃

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(CC_IN)

Differential input voltage

range

–0.1

0.1

V

t(CC_CONV)

Conversion time

Single conversion

1000

ms

Effective resolution

1 LSB

3.8

µV

Integral nonlinearity

16-bit, best fit over input voltage

range

–22.3

5.2

+22.3

LSB

Differential nonlinearity

16-bit, no missing codes

1.5

LSB

Offset error

16- bit post calibration

–2.6

1.3

+2.6

LSB

Offset error drift

15-bit + sign, post calibration

0.04

0.07

LSB/°C

Gain error

15-bit + sign, over input voltage range

–492

131

+492

LSB

Gain error drift

15-bit + sign, over input voltage range

4.3

9.8

LSB/°C

Effective input resistance

7

MΩ

7.12 Analog Digital Converter (ADC)

Unless otherwise noted, characteristics noted under conditions of TA = –40℃ to 85℃

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VADC_TS_GPIO

Input voltage range

VFS = VREF2

–0.2

1.0

V

VFS = VREG18 × 2

–0.2

1.44

V

VBAT_MODE

Battery input voltage

–0.2

5.5

V

Integral nonlinearity

16-bit, best fit, –0.1 V to 0.8 × VREF2

–8.4

+8.4

LSB

Differential nonlinearity

16-bit, no missing codes

1.5

LSB

Offset error

16-bit post calibration(1), VFS = VREF2

–4.2

1.8

+4.2

LSB

Offset error drift

16-bit post calibration(1), VFS = VREF2

0.02

0.1

LSB/°C

Gain Error

16-bit, –0.1 to 0.8 × VFS

–492

131

+492

LSB

Gain error drift

16-bit, –0.1 to 0.8 × VFS

2

4.5

LSB/°C

Effective input resistance

8

MΩ

t(ADC_CONV)

Conversion time

11.7

ms

Effective resolution

14

15

bits

(1)

Factory calibration

BQ27Z561-R2

SLUSE22B – FEBRUARY 2020 – REVISED NOVEMBER 2022

www.ti.com

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