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| BQ27425-G2_14 Datasheet, PDF (5/35 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated Sense Resistor | |||
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bq27425-G2
www.ti.com
SLUSB23A â OCTOBER 2012 â REVISED FEBRUARY 2013
2.5V LDO REGULATOR
TA = â40°C to 85°C, CLDO25 = 1μF, VREGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITION
VREG25
VIH(CE)
VIL(CE)
Regulator output voltage
CE High-level input voltage
CE Low-level input voltage
2.7V ⤠VREGIN ⤠4.5V, IOUT ⤠5mA
2.45V ⤠VREGIN < 2.7V (low battery),
IOUT ⤠3mA
VREGIN = 2.7 to 4.5V
MIN
2.4
2.4
2.65
NOM
2.5
MAX
2.6
UNIT
V
V
V
0.8
INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS
TA = â40°C to 85°C; typical values at TA = 25°C and VREGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
VSR
Input voltage range (1)(2)
VSR = V(SRX) â VSS
â0.040
tSR_CONV
Conversion time
Single conversion
1
Resolution
14
VOS(SR)
INL
ZIN(SR)
Ilkg(SR)
Input offset
Integral nonlinearity error
Effective input resistance(1)
Input leakage current(1)
TA = 25°C
10
±0.007
2.5
(1) Specified by design. Not tested in production.
(2) Limited by ISRX maximum recommend input current with some margin for the Integrated Sense Resistor tolerance.
MAX
0.040
15
±0.034
0.3
UNIT
V
s
bits
μV
% FSR
Mâ¦
μA
INTEGRATED SENSE RESISTOR CHARACTERISTICS
TA = â40°C to 85°C; typical values at TA = 25°C and VREGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
SRXRES
Resistance of Integrated Sense TA = 25°C
10
Resistor from SRX to VSS.(1)(2)
ISRX
Recommended Sense Resistor Long term RMS, average device
input current.(1)(3)
utilization.
Peak RMS current, 10% device
utilization. (3)
Peak pulsed current, 250mS max,
1% device utilization.(3)
(1) Specified by design. Not tested in production.
(2) Firmware compensation applied for temperature coefficient of resistor.
(3) Device utilization is the long term usage profile at a specific condition compared to the average condition.
MAX UNIT
mâ¦
2000 mA
2500 mA
3500 mA
ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS
TA = â40°C to 85°C; typical values at TA = 25°C and VREGIN = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
VIN(ADC)
GTEMP
Input voltage range
Temperature sensor voltage
gain
0.05
tADC_CONV
Conversion time
Resolution
14
VOS(ADC)
Input offset
ZADC
Effective input resistance
(BAT) (1)
Not measuring cell voltage
Measuring cell voltage
8
Ilkg(ADC)
Input leakage current(1)
TA = 25°C
(1) Specified by design. Not tested in production.
TYP
MAX UNIT
1V
â2
mV/°C
125 ms
15 bits
1
mV
Mâ¦
100
kâ¦
0.3 μA
Copyright © 2012â2013, Texas Instruments Incorporated
Product Folder Links: bq27425-G2
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