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3.9DATAFLASHMEMORYCHARACTERISTICS
3.10I
2
C-COMPATIBLEINTERFACECOMMUNICATIONTIMINGCHARACTERISTICS
bq27500
bq27501
System-SideImpedanceTrack™FuelGauge
SLUS785–SEPTEMBER2007
ADC(TEMPERATUREANDCELLMEASUREMENT)CHARACTERISTICS(continued)
T
A
=–40°Cto85°C,2.4V<V
CC
<2.6V;TypicalValuesatT
A
=25°CandV
CC
=2.5V(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
t
ADC_CONV
Conversiontime125ms
Resolution1415bits
V
ADC_OS
Inputoffset1mV
Z
ADC1
Effectiveinputresistance(TS,RID8MΩ
[bq27501only])
bq27500/1notmeasuringcellvoltage8MΩ
Z
ADC2
Effectiveinputresistance(BAT)
(1)
bq27500/1measugingcellvoltage100kΩ
I
ADC_LKG
InputLeakageCurrent
(1)
0.3μA
(1)Specifiedbydesign.Nottestedinproduction.
T
A
=–40°Cto85°C,2.4V<V
CC
<2.6V;TypicalValuesatT
A
=25°CandV
CC
=2.5V(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
t
ON
DataretentionSee
(1)
10
(1)
Years
Flashprogrammingwrite-cyclesSee
(1)
20,000Cycles
t
WORDPROG
WordprogrammingtimeSee
(1)
2ms
I
CCPROG
Flash-writesupplycurrent510mA
(1)Specifiedbydesign.Notproductiontested
T
A
=–40°Cto85°C,2.4V<V
CC
<2.6V;TypicalValuesatT
A
=25°CandV
CC
=2.5V(unlessotherwisenoted)
PARAMETERTESTCONDITIONSMINTYPMAXUNIT
t
r
SCL/SDArisetime1μs
t
f
SCL/SDAfalltime300ns
t
w(H)
SCLpulsewidth(high)4μs
t
w(L)
SCLpulsewidth(low)4.7μs
t
su(STA)
Setupforrepeatedstart4.7μs
t
d(STA)
StarttofirstfallingedgeofSCL4μs
t
su(DAT)
Datasetuptime250ns
Receivemode0
t
h(DAT)
Dataholdtimens
Transmitmode300
t
su(STOP)
Setuptimeforstop4μs
t
BUF
Busfreetimebetweenstopandstart4.7μs
f
SCL
Clockfrequency10100kHz
t
BUSERR
Buserrortimeout17.321.2s
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