Datasheet

bq27541-G1
www.ti.com SLUSAL6C –NOVEMBER 2011–REVISED OCTOBER 2012
HIGH FREQUENCY OSCILLATOR
T
A
= –40°C to 85°C, C
(REG)
= 0.47μF, 2.45 V < V
(REGIN)
= V
BAT
< 5.5 V; typical values at T
A
= 25°C and V
(REGIN)
= V
BAT
= 3.6 V
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
(OSC)
Operating frequency 2.097 MHz
T
A
= 0°C to 60°C –2.0% 0.38% 2.0%
f
(EIO)
Frequency error
(1) (2)
T
A
= –20°C to 70°C –3.0% 0.38% 3.0%
T
A
= –40°C to 85°C -4.5% 0.38% 4.5%
t
(SXO)
Start-up time
(3)
2.5 5 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 startup time is defined as the time it takes for the oscillator output frequency to be ±3%.
LOW FREQUENCY OSCILLATOR
T
A
= –40°C to 85°C, C
(REG)
= 0.47μF, 2.45 V < V
(REGIN)
= V
BAT
< 5.5 V; typical values at T
A
= 25°C and V
(REGIN)
= V
BAT
= 3.6 V
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
f
(LOSC)
Operating frequency 32.768 KHz
T
A
= 0°C to 60°C –1.5% 0.25% 1.5%
f
(LEIO)
Frequency error
(1) (2)
T
A
= –20°C to 70°C –2.5% 0.25% 2.5%
T
A
= –40°C to 85°C -4.0% 0.25% 4.0%
t
(LSXO)
Start-up time
(3)
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 startup time is defined as the time it takes for the oscillator output frequency to be ±3% of typical oscillator frequency.
INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS
T
A
= –40°C to 85°C, C
(REG)
= 0.47μF, 2.45 V < V
(REGIN)
= V
BAT
< 5.5 V; typical values at T
A
= 25°C and V
(REGIN)
= V
BAT
= 3.6 V
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN(SR)
Input voltage range, V
(SRN)
and V
(SRP)
V
SR
= V
(SRN)
– V
(SRP)
–0.125 0.125 V
t
CONV(SR)
Conversion time Single conversion 1 s
Resolution 14 15 bits
V
OS(SR)
Input offset 10 μV
I
NL
Integral nonlinearity error ±0.007 ±0.034 FSR
Z
IN(SR)
Effective input resistance
(1)
2.5 MΩ
I
lkg(SR)
Input leakage current
(1)
0.3 μA
(1) Specified by design. Not production tested.
ADC (TEMPERATURE AND CELL VOLTAGE) CHARACTERISTICS
T
A
= –40°C to 85°C, C
(REG)
= 0.47μF, 2.45 V < V
(REGIN)
= V
BAT
< 5.5 V; typical values at T
A
= 25°C and V
(REGIN)
= V
BAT
= 3.6 V
(unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN(ADC)
Input voltage range –0.2 1 V
t
CONV(ADC)
Conversion time 125 ms
Resolution 14 15 bits
V
OS(ADC)
Input offset 1 mV
Z
(ADC1)
Effective input resistance (TS)
(1)
8 MΩ
bq27541-G1 not measuring cell voltage 8 MΩ
Z
(ADC2)
Effective input resistance (BAT)
(1)
bq27541-G1 measuring cell voltage 100 kΩ
(1) Specified by design. Not production tested.
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