BQ27520-G2 Datasheet, PDF (7/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO

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bq27520-G2
SLUSAB7A – MARCH 2011 – REVISED AUGUST 2011
3.7 LOW-FREQUENCY OSCILLATOR
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_LOSC
f_LEIO
t_LSXO
Operating frequency
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%
32.768
0.25%
0.25%
0.25%
kHz
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.
3.8 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_(SRN) and V_(SRP)
Conversion time
Resolution
V_SR = V_(SRN) – V_(SRP)
Single conversion
–0.125
14
0.125
1
15
V_OS(SR)
INL
Z_IN(SR)
I_lkg(SR)
Input offset
Integral nonlinearity error
Effective input resistance⁽¹⁾
Input leakage current⁽¹⁾
10
±0.007
2.5
±0.034
0.3
(1) Specified by design. Not tested in production.
UNIT
V
s
bits
μV
% FSR
MΩ
μA
3.9 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_IN(ADC)
t_{ADC_CONV}
Input voltage range
Conversion time
Resolution
0.05
1
125
14
15
V_OS(ADC)
Z_ADC1
Z_ADC2
I_lkg(ADC)
Input offset
Effective input resistance (TS)⁽¹⁾
Effective input resistance (BAT)⁽¹⁾
Input leakage current⁽¹⁾
bq27520-G2 not measuring cell voltage
bq27520-G2 measuring 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
Copyright © 2011, Texas Instruments Incorporated
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ELECTRICAL SPECIFICATIONS
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