BQ27500_08 Datasheet, PDF (5/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge

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bq27500
bq27501
System-Side Impedance Track™ Fuel Gauge
SLUS785D – SEPTEMBER 2007 – REVISED APRIL 2008
3.3 DISSIPATION RATINGS
PACKAGE
12-pin DRZ⁽¹⁾
T_A ≤ 40°C
POWER RATING
482 mW
DERATING FACTOR
T_A > 40°C
5.67 mW/°C
R_θJA
176°C/W
(1) This data is based on using a four-layer JEDEC high-K board with the exposed die pad connected to a Cu pad on the board. The board
pad is connected to the ground plane by a 2- × 2-via matrix.
3.4 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
Hysteresis voltage
2.09
45
TYP MAX UNIT
2.2 2.31 V
115
185 mV
3.5 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
3.6 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
2.097
–2% 0.38%
–3% 0.38%
–4.5% 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.
3.7 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.
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ELECTRICAL SPECIFICATIONS
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