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BQ27520-G3 Datasheet, PDF (7/47 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Integrated LDO | |||
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www.ti.com
bq27520-G3
SLUSAP0 â DECEMBER 2011
3.7 LOW-FREQUENCY OSCILLATOR
TA = â40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
fLOSC
Operating frequency
32.768
kHz
fLEIO
Frequency error(1) (2)
TA = 0°C to 60°C
TA = â20°C to 70°C
â1.5%
â2.5%
0.25%
0.25%
1.5%
2.5%
tLSXO
Start-up time(3)
TA = â40°C to 85°C
â4% 0.25%
4%
500 μs
(1) The frequency drift is included and measured from the trimmed frequency at VCC = 2.5 V, TA = 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
TA = â40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP
MAX
VSR
tSR_CONV
Input voltage range, V(SRN) and V(SRP)
Conversion time
Resolution
VSR = V(SRN) â V(SRP)
Single conversion
â0.125
14
0.125
1
15
VOS(SR)
Input offset
INL
Integral nonlinearity error
ZIN(SR)
Ilkg(SR)
Effective input resistance(1)
Input leakage current(1)
(1) Specified by design. Not tested in production.
10
±0.007
2.5
±0.034
0.3
UNIT
V
s
bits
μV
% FSR
Mâ¦
μA
3.9 ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS
TA = â40°C to 85°C, 2.4 V < VCC < 2.6 V; typical values at TA = 25°C and VCC = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
VIN(ADC)
tADC_CONV
Input voltage range
Conversion time
Resolution
0.05
1
125
14
15
VOS(ADC)
ZADC1
Input offset
Effective input resistance (TS)(1)
ZADC2
Effective input resistance (BAT)(1)
Ilkg(ADC)
Input leakage current(1)
(1) Specified by design. Not tested in production.
bq27520-G3 not measuring cell voltage
bq27520-G3 measuring cell voltage
1
8
8
100
0.3
UNIT
V
ms
bits
mV
Mâ¦
Mâ¦
kâ¦
μA
Copyright © 2011, Texas Instruments Incorporated
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ELECTRICAL SPECIFICATIONS
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