Texas Instruments BQ769142, Manual

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(2) V
(REF1)
is used for the ADC reference. Its effective value is determined through indirect measurement using the ADC and measuring
the differential voltage on VC1 - VC0.
(3) V
(REF2)
is used for the LDO, coulomb counter, and current measurement
(4) Specified by characterization
7.15 Coulomb Counter
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
(CC_IN)
Input voltage range
for measurements
(4)
V
SRP
- V
SRN
–0.2 0.2 V
V
(CC_IN)
Input voltage range
for measurements
(4)
V
SRP
, V
SRN
–0.2 0.2 V
B
(CC_INL)
Integral nonlinearity
(3)
16-bit, best fit over input voltage range, using
0 V common mode voltage.
±5.2 ±22.3 LSB
(2)
B
(CC_DNL)
Differential
nonlinearity
16-bit, no missing codes ±0.1 LSB
(2)
V
(CC_OFF)
Offset error
(3)
16-bit, uncalibrated -1 1 LSB
(2)
V
(CC_OFF_DRIFT)
Offset error drift
(3)
16-bit, post-calibration –0.03 0.03 LSB/°C
(2)
B
(CC_GAIN)
Gain
(3)
16-bit, over ideal input voltage range 130845 131454 132335 LSB/V
(2)
R
(CC_IN)
Effective input
resistance
(4)
2 MΩ
(1) Operation with V
BAT
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
5.5 V or 11 V mode), the maximum voltage on V
BAT
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
their maximum specified voltage.
(2) 1 LSB (16-bit mode, using CC1 filter) = V
REF2
/ (5 x 2
N-1
) ≈ 1.24 / (5 x 2
15
) = 7.6µV
(3) Specified by characterization
(4) Specified by design
7.16 Coulomb Counter Digital Filter (CC1)
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
(CC1_CONV_FAST)
Conversion-time
Single conversion (when operating from
LFO in 262.144kHz mode)
250 ms
t
(CC1_CONV_SLOW)
Conversion-time
Single conversion (when operating from
LFO in 32.768kHz mode)
4 s
B
(CC1_RSL)
Code stability
(2) (3)
Single conversion 14.3 bits
(1) Operation with V
BAT
up to 80 V is supported when the charge pump is not in operation. Whenever the charge pump is in operation (in
5.5 V or 11 V mode), the maximum voltage on V
BAT
should be reduced to ensure the voltage on CP1, CHG, and DSG does not exceed
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 a combination of design and production test
7.17 Current Measurement Digital Filter (CC2)
Typical values stated where T
A
= 25°C and V
BAT
= 59.2 V, min/max values stated where T
A
= -40°C to 85°C and V
BAT
= 4.7 V
to 80 V (unless otherwise noted)
(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
(CC2_CONV)
Conversion-time
Single conversion, in NORMAL mode,
Settings:Configuration:Power
Config[FASTADC]
= 0
2.93 ms
t
(CC2_CONV_FAST)
Conversion-time in fast mode
Single conversion, in NORMAL mode,
Settings:Configuration:Power
Config[FASTADC]
= 1
1.46 ms
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BQ769142
SLUSE91A – SEPTEMBER 2020 – REVISED FEBRUARY 2021
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