BQ27500-V120 Datasheet, PDF (6/36 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27500-V120
System-Side Impedance Track™ Fuel Gauge
SLUS880 – OCTOBER 2008
www.ti.com
LOW-FREQUENCY OSCILLATOR (continued)
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 UNIT
f_LEIO
t_LSXO
Frequency error^{(1) (2)}
Start-up time⁽³⁾
T_A = 0°C to 60°C
T_A = –20°C to 70°C
T_A = –40°C to 85°C
–1.5%
–2.5%
–4%
0.25%
0.25%
0.25%
1.5%
2.5%
4%
500 µs
(1) The frequency drift is included and measured from the trimmed frequency at V_CC = 2.5 V, T_A = 25°C.
(2) The frequency error is measured from 32.768 kHz.
(3) The start-up time is defined as the time it takes for the oscillator output frequency to be within ±3% of typical oscillator frequency.
3.7 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_SR = V_(SRN) – V_(SRP))
Conversion time
Resolution
Single conversion
–0.125
14
0.125
1
15
V_{SR_OS}
INL
Z_{SR_IN}
I_{SR_LKG}
Input offset
Integral nonlinearity error
Effective input resistance⁽¹⁾
Input leakage current⁽¹⁾
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
3.8 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_{ADC_IN}
t_{ADC_CONV}
Input voltage range
Conversion time
Resolution
–0.2
1
125
14
15
V_{ADC_OS}
Z_ADC1
Z_ADC2
I_{ADC_LKG}
Input offset
Effective input resistance (TS, NC)⁽¹⁾
Effective input resistance (BAT)⁽¹⁾
Input leakage current⁽¹⁾
bq27500 not measuring cell voltage
bq27500 measuging cell voltage
1
8
8
100
0.3
(1) Specified by design. Not tested in production.
UNIT
V
ms
bits
mV
MΩ
MΩ
kΩ
µA
3.9 DATA FLASH MEMORY 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)
t_ON
t_WORDPROG
I_CCPROG
PARAMETER
Data retention⁽¹⁾
Flash-programming write cycles⁽¹⁾
Word programming time⁽¹⁾
Flash-write supply current⁽¹⁾
TEST CONDITIONS
MIN TYP
10
20,000
5
MAX
2
10
(1) Specified by design. Not production tested
UNIT
Years
Cycles
ms
mA
6
ELECTRICAL SPECIFICATIONS
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