BQ27505-J2 Datasheet, PDF (6/42 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

bq27505-J2
System-Side Impedance Track™ Fuel Gauge
SLUS924 – APRIL 2009
3.3 POWER-ON RESET
T_A = –40°C to 85°C, typical values at T_A = 25°C and V_BAT = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
V_IT+
V_HYS
Positive-going battery voltage input at V_CC
Power-on reset hysteresis
2.09
45
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TYP MAX UNIT
2.20 2.31 V
115
185 mV
3.4 INTERNAL TEMPERATURE SENSOR 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
G_TEMP
Temperature sensor voltage gain
–2
UNIT
mV/°C
3.5 HIGH-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_OSC
f_EIO
t_SXO
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
–2%
–3%
–4.5%
2.097
0.38%
0.38%
0.38%
2.5
2%
3%
4.5%
5
MHz
ms
(1) The frequency error is measured from 2.097 MHz.
(2) The frequency drift is included and measured from the trimmed frequency at V_CC = 2.5 V, T_A = 25°C.
(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.
3.6 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.
3.7 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_(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
6
ELECTRICAL SPECIFICATIONS
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