Current Wake Detector; Analog-To-Digital Converter - Texas Instruments BQ769142 Manual

High accuracy battery monitor and protector for liion, li-polymer, and lifepo4 battery packs
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BQ769142
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
Typical values stated where T
to 80 V (unless otherwise noted)
PARAMETER
B
Code stability
(CC2_RES)
B
Code stability in fast mode
(CC2_RES_FAST)
(1)
Operation with V
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
BAT
5.5 V or 11 V mode), the maximum voltage on V
their maximum specified voltage.
(2)
Code stability is defined as the resolution such that the data exhibits 3-sigma variation within ±1-LSB.
(3)
Specified by characterization

7.18 Current Wake Detector

Typical values stated where T
to 80 V (unless otherwise noted)
PARAMETER
V
Wakeup voltage threshold error
WAKE_THR
V
Wakeup voltage threshold error
WAKE_THR
t
Measurement interval
WAKE
(1)
Operation with V
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
BAT
5.5 V or 11 V mode), the maximum voltage on V
their maximum specified voltage.
(2)
Specified by design

7.19 Analog-to-Digital Converter

Typical values stated where T
to 80 V (unless otherwise noted)
PARAMETER
Input voltage range
V
(differential cell input
(ADC_IN_CELLS)
mode)
Input voltage range
V
(ADCIN measurement
(ADC_IN)
mode)
Input voltage range
(external thermistor
V
(ADC_IN_TS)
measurement mode)
(7)
Input voltage range
V
(divider measurement
(ADC_IN_DIV)
mode)
Integral nonlinearity
(when using V
and differential cell
B
(ADC_INL)
voltage measurement
mode at VC14 -
VC13A)
16
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= 25°C and V
= 59.2 V, min/max values stated where T
A
BAT
(1)
Single conversion, in NORMAL mode,
(2) (3)
Settings:Configuration:Power
Config[FASTADC] = 0
Single conversion, in NORMAL mode,
(2)
Settings:Configuration:Power
Config[FASTADC] = 1
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
BAT
= 25°C and V
= 59.2 V, min/max values stated where T
A
BAT
(1)
T
= 25°C, V
A
between ±0.5 mV and ±5 mV. Measured
(2)
using averaged data to remove effects of
noise.
T
= 25°C, V
A
(2)
beyond ±5 mV. Measured using
averaged data to remove effects of noise.
(2)
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
BAT
= 25°C and V
= 59.2 V, min/max values stated where T
A
BAT
(1)
TEST CONDITIONS
Internal reference (Vref = V
(5)
Internal reference (Vref = V
to ADCIN measurements using the TS1, TS2,
TS3, ALERT, CFETOFF, DFETOFF, HDQ,
(6)
DCHG, and DDSG pins
Regulator reference (Vref = V
applicable to external thermistor
measurements using the TS1, TS2, TS3,
ALERT, CFETOFF, DFETOFF, HDQ, DCHG,
and DDSG pins
Internal reference (Vref = V
to divider measurements using the VC14,
(8)
PACK, and LD pins relative to VSS.
16-bit, best fit over -0.1 V to 5.5 V
REF1
16-bit, best fit over -0.2 V to 0.2 V
(4)
Product Folder Links:
TEST CONDITIONS
TEST CONDITIONS
= V
– V
, setting
WAKE
SRP
SRN
= V
– V
, setting
WAKE
SRP
SRN
)
REF1
), applicable
REF1
),
REG18
), applicable
REF1
BQ769142
www.ti.com
= -40°C to 85°C and V
A
BAT
MIN
TYP
MAX
14
15
13.5
= -40°C to 85°C and V
A
BAT
MIN
TYP
MAX
-200
200
-5
5
12
= -40°C to 85°C and V
A
BAT
MIN
TYP
MAX
–0.2
5.5
–0.2
V
REG18
–0.2
V
REG18
–0.2
80
–6.6
6.6
–4
4
Copyright © 2021 Texas Instruments Incorporated
= 4.7 V
UNIT
bits
bits
= 4.7 V
UNIT
µV
% of
setting
ms
= 4.7 V
UNIT
V
V
V
V
(5)
LSB
(5)
LSB

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