Datasheet

DS2786 Stand-Alone OCV-Based Fuel Gauge
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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Spike Pulse Widths
Suppressed by Input
Filter
t
SP
(Note 8) 0 50 ns
Capacitive Load for Each
Bus Line
C
B
(Note 9) 400 pF
SCL, SDA Input
Capacitance
C
BIN
60 pF
Note 1:
All voltages are referenced to V
SS
.
Note 2:
Offset specified after auto-calibration cycle and Current Offset Bias Register = 00h.
Note 3:
The DS2786 enters the Sleep mode 1.5s to 2.2s after (SCL < V
IL
) AND (SDA < V
IL
).
Note 4:
Timing must be fast enough to prevent the DS2786 from entering Sleep mode due to bus low for period
> t
SLEEP
.
Note 5:
f
SCL
must meet the minimum clock low time plus the rise/fall times.
Note 6:
The maximum t
HD:DAT
has only to be met if the device does not stretch the LOW period (t
LOW
) of the SCL
signal.
Note 7:
This device internally provides a hold time of at least 100ns for the SDA signal (referred to the V
IHmin
of
the SCL signal) to bridge the undefined region of the falling edge of SCL.
Note 8:
Filters on SDA and SCL suppress noise spikes at the input buffers and delay the sampling instant.
Note 9:
C
B
—total capacitance of one bus line in pF.
Figure 1. 2-Wire Bus Timing Diagram