BQ27531-G1 Datasheet, PDF (7/21 Pages) Texas Instruments – Battery Management Unit Impedance Track Fuel Gauge for Use With the bq2419x Charger Controller

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bq27531-G1
SLUSBE7 – MARCH 2013
ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < V_CC < 2.6 V; typical values at T_A = 25°C and V_CC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
V_ADC1
Input voltage range (TS)
V_SS –
2
0.125
V_ADC2
Input voltage range (BAT)
V_SS –
5
0.125
V_IN(ADC)
G_TEMP
Input voltage range
Internal temperature sensor
voltage gain
0.05
1
–2
t_{ADC_CONV}
Conversion time
Resolution
125
14
15
V_OS(ADC)
Z_ADC1 ⁽¹⁾
Z_ADC2 ⁽¹⁾
I_lkg(ADC) ⁽¹⁾
Input offset
Effective input resistance (TS)
Effective input resistance (BAT)
Input leakage current
bq27531-G1 not measuring cell voltage
bq27531-G1 measuring cell voltage
1
8
8
100
0.3
(1) Specified by design. Not tested in production.
UNIT
V
V
V
mV/°C
ms
bits
mV
MΩ
MΩ
kΩ
μA
INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS
T_A = –40°C to 85°C, 2.4 V < V_CC < 2.6 V; typical values at T_A = 25°C and V_CC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
V_SR
t_{SR_CONV}
Input voltage range,
V_(SRP) and V_(SRN)
Conversion time
Resolution
V_SR = V_(SRP) – V_(SRN)
Single conversion
–0.125
14
0.125
1
15
V_OS(SR)
INL
Z_IN(SR) ⁽¹⁾
I_lkg(SR) ⁽¹⁾
Input offset
Integral nonlinearity error
Effective input resistance
Input leakage current
10
±0.007 ±0.034
2.5
0.3
(1) Specified by design. Not tested in production.
UNIT
V
s
bits
μV
% FSR
MΩ
μA
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