LTC2941 Linear Technology, LTC2941 Datasheet - Page 3

• Manufacturer Part Number: LTC2941
• Description: Battery Gas Gauge
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
Digital Inputs and Digital Outputs
V
V
I
C
t
I
f
t
t
t
t
t
t
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive, all voltages are referenced to
GND unless otherwise specifi ed
Note 3: I
Note 4: The equivalent charge of an LSB in the accumulated charge
registers (C,D) depends on the value of R
TIMING DIAGRAM
IN
PCC
2
SCL(MAX)
BUF(MIN)
SU,STA(MIN)
HD,STA(MIN)
SU,STO(MIN)
SU,DAT(MIN)
HD,DATI(MIN)
ITH
OL
IN
C Timing Characteristics
SUPPLY
PARAMETER
Logic Input Threshold, AL/CC, SCL,
SDA
Low Level Output Voltage, AL/CC, SDA I = 3mA
Input Leakage, AL/CC, SCL, SDA
Input Capacitance, AL/CC, SCL, SDA
Minimum Charge Complete (CC) Pulse
Width
Maximum SCL Clock Frequency
Bus Free Time Between Stop/Start
Minimum Repeated Start Setup Time
Minimum Hold Time (Repeated)
Start Condition
Minimum Setup Time for Stop
Condition
Minimum Data Setup Time Input
Minimum Data Hold Time Input
= I
SENSE +
t
SDA
SCL
HD, STA
CONDITION
START
+ I
SENSE –
SENSE
t
SU, DAT
and the setting of the
Figure 1. Defi nition of Timing on I
CONDITIONS
V
(Note 7)
t
t
IN
HD, DATO,
HD, DATI
= V
A
= 25°C. (Note 2)
SENSE +
The
/2
REPEATED START
l
CONDITION
denotes the specifi cations which apply over the full operating
internal pre-scaling factor M. It is calculated by:
See Choosing R
information.
1mAh = 3.6A • s = 3.6C (Coulomb), 0.085mAh = 306mC.
Note 5: Deviation of q
Note 6: C
Note 7: Guaranteed by design, not subject to test.
t
q
SU, STA
LSB
= 0.085mAh •
t
HD, STA
B
= capacitance of one bus line in pF (10pF ≤ C
2
C Bus
SENSE
R
50mΩ
t
SU, STO
SENSE
LSB
and Coulomb Counter Prescaler M section for more
l
l
l
l
l
l
l
l
l
l
l
from its nominal value.
t
of
•
128
CONDITION
M
STOP
V
SENSE +
0.3 •
MIN
400
t
BUF
CONDITION
TYP
900
START
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2941 F01
LTC2941
V
B
SENSE +
MAX
0.7 •
≤ 400pF).
600
600
600
100
0.4
1.3
10
1
1
0
UNITS
3
2941f
kHz
μA
pF
μs
μs
ns
ns
ns
ns
μs
V
V