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SI1153 数据表(PDF) 8 Page - Silicon Laboratories

部件名 SI1153
功能描述  Proximity/Ambient Light Sensor IC with IC Interface
Download  58 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI1153 数据表(HTML) 8 Page - Silicon Laboratories

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3.3 Power Consumption
The Si1153 alternates between three power consumption states: Active, Suspend, and Sleep. (See the diagram below for an illustrata-
tion of each of these states.) The total power consumed by the part depends heavily on the measurement rate, measurement mode,
and measurement gain for the various channels enabled. The power levels for the three modes, as well as the Active Power time per
reading, are provided in this document. The Suspend time (where the A/D and PD are operating) has two parts. One is determined by
the user setup and can be determined by the DECIM_RATE and HW_GAIN setup information in Section 7.2 Channel Specific Setup
Areas of the Parameter Table, while the other (A/D Startup time) is determined by tadstart, shown in Table 8.2 Electrical Performance
Characteristics on page 38.
Sleep Power
Sum is “Processing Time Per
Measurement” (t
process)
Suspend Power
(PD & A/D Active)
The A/D time (per
measurement) is determined
by the user’s configuration of
the parameter table.
This complete measurement is repeated at the
rates determined by the user’s configuration of
the parameter table.
Power
Time
Active Power
A/D startup time per
measurement is
determined by the
data sheet (tadstart)
A Phase
B Phase
Figure 3.5. Power Consumption States During a Reading
Every A/D conversion has three periods:
155 μs at 4.5 mA
(setup time by internal controller)
48.8 μs at 525 μA
(setup time by A/D)
48.8 μs * (2 ** gain) at 525 μA
(Actual A/D time that will vary with integration time)
Si1153 Data Sheet
Functional Description
silabs.com | Smart. Connected. Energy-friendly.
Rev. 0.9 | 7


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