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3.4
INTERNAL TEMPERATURE SENSOR CHARACTERISTICS
T
= –40 C to 85 C, 2.4 V < V
A
PARAMETER
G
Temperature sensor voltage gain
TEMP
3.5
HIGH FREQUENCY OSCILLATOR
T
= –40 C to 85 C, 2.4 V < V
A
PARAMETER
f
Operating frequency
OSC
(1) (2)
f
Frequency error
EIO
(3)
t
Start-up time
SXO
(1) The frequency error is measured from 2.097 MHz.
(2) The frequency drift is included and measured from the trimmed frequency at V
(3) The startup time is defined as the time it takes for the oscillator output frequency to be 3%.
3.6
LOW FREQUENCY OSCILLATOR
T
= –40 C to 85 C, 2.4 V < V
A
PARAMETER
f
Operating frequency
LOSC
(1) (2)
f
Frequency error
LEIO
(3)
t
Start-up time
LSXO
(1) The frequency drift is included and measured from the trimmed frequency at V
(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%.
3.7
INTEGRATING ADC (COULOMB COUNTER) CHARACTERISTICS
T
= –40 C to 85 C, 2.4 V < V
A
PARAMETER
V
Input voltage range, V
SR_IN
t
Conversion time
SR_CONV
Resolution
V
Input offset
SR_OS
INL
Integral nonlinearity error
Z
Effective input resistance
SR_IN
I
Input leakage current
SR_LKG
(1) Specified by design. Not tested in production.
3.8
ADC (TEMPERATURE AND CELL MEASUREMENT) CHARACTERISTICS
T
= –40 C to 85 C, 2.4 V < V
A
PARAMETER
V
Input voltage range
ADC_IN
Submit Documentation Feedback
< 2.6 V; Typical Values at T
CC
< 2.6 V; Typical Values at T
CC
T
= 0 C to 60 C
A
T
= –20 C to 70 C
A
T
= –40 C to 85 C
A
< 2.6 V; Typical Values at T
CC
TEST CONDITIONS
T
= 0 C to 60 C
A
T
= –20 C to 70 C
A
T
= –40 C to 85 C
A
< 2.6 V; Typical Values at T
CC
and V
V
(SRN)
(SRP)
SR
Single conversion
Before calibration
After calibration
(1)
(1)
< 2.6 V; Typical Values at T
CC
System-Side Impedance Track™ Fuel Gauge
= 25 C and V
= 2.5 V (unless otherwise noted)
A
CC
TEST CONDITIONS
= 25 C and V
= 2.5 V (unless otherwise noted)
A
CC
TEST CONDITIONS
= 2.5V, T
= 25 C.
CC
A
= 25 C and V
= 2.5 V (unless otherwise noted)
A
CC
= 2.5V, T
= 25 C.
CC
A
= 25 C and V
= 2.5 V (unless otherwise noted)
A
CC
TEST CONDITIONS
= V
– V
(SRN)
(SRP)
= 25 C and V
= 2.5 V (unless otherwise noted)
A
CC
TEST CONDITIONS
bq27500
bq27501
SLUS785 – SEPTEMBER 2007
MIN
TYP
MAX
–2.0
MIN
TYP
MAX
2.097
–2.0% 0.38%
2.0%
–3.0% 0.38%
3.0%
–4.5% 0.38%
4.5%
2.5
5
MIN
TYP
MAX
32.768
–1.5%
0.25%
1.5%
–2.5%
0.25%
2.5%
–4.0%
0.25%
4.0%
500
MIN
TYP
MAX
–0.125
0.125
1
14
15
1
10
0.007
0.034
2.5
0.3
MIN
TYP
MAX
–0.2
1
ELECTRICAL SPECIFICATIONS
UNIT
mV/ C
UNIT
MHz
ms
UNIT
kHz
μs
UNIT
V
s
bits
mV
μV
% FSR
M
μA
UNIT
V
5
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