BQ26231 Datasheet, PDF (3/18 Pages) Texas Instruments – LOW COST BATTERY COULOMB COUNTER FOR EMBEDDED PORTABLE APPLICATIONS

bq26231
SLUS491 – JULY 2001
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage (V_CC with respect to V_SS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
Input voltage: HDQ (all with respect to V_SS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 V
RBI, SR1, and SR2 (with respect to V_SS) . . . . . . . . . . . . . . . . . . . . . . . . . V_SS – 0.3 V to V_CC + 3 V
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20°C to 70°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
Lead temperature (soldering, 10 s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
Supply voltage, VCC
Supply current, II(OP)
Sleep current, II(SLEEP)
RBI current, II(RBI)
Operating ambient temperature, TA
VCC = 3.7 V, VI(HDQ) = 3.7 V
VCC = 5.5 V, VI(HDQ) = 5.5 V
VCC = 5.5 V
VCC < 2.4 V
MIN TYP MAX UNIT
2.8 4.25 5.5 V
60
70
µA
70
80
10 µA
100 nA
–20
70 °C
dc electrical characteristics over recommended operating temperature and supply voltage (unless
otherwise noted)
VIl(HDQ)
VIH(HDQ)
PARAMETER
Digital input low HDQ pin
Digital input high HDQ pin
SR1 and SR2 input impedance
TEST CONDITIONS
–200 mV < V(SR) < 200 mV
MIN TYP
2.5
10
MAX
0.8
UNIT
V
V
MΩ
timer characteristics over recommended operating temperature and supply voltage (unless
otherwise noted)
E(TMR)
PARAMETER
Timer accuracy error
TEST CONDITIONS
3.5 V ≤ VCC ≤ 3.9 V, 0°C ≤ TA ≤ 70°C
MIN TYP MAX
–3% 1.5% 3%
UNIT
VFC characteristics over recommended operating temperature and supply voltage (unless
otherwise noted)
PARAMETER
SR1 and SR2 input voltage
Offset voltage, V(OS)
Integrated nonlinearity
Integrated nonrepeatability error
TEST CONDITIONS
Add 0.05% per °C above or below 25°C and 0.5% per volt above
or below 3.7 V
Measured repeatability given similar operating conditions
MIN TYP
–200
MAX
200
500
1% 2%
0.5% 1%
UNIT
mV
µV
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