AK9753 Datasheet, PDF (41/50 Pages) Asahi Kasei Microsystems – IR Sensor IC with I2C I/F

[AK9753]
16. First data Determination Time
The First data determination time is defined as the time between “setting the registers” and “determining
the measurement data”. It depends on Measurement Mode setting and Digital Filter setting.
Since the first data determination time also depends on the OCS frequency, Min./Max. is Typ. ±10%.
<First data Determination Time (Typ.) in each Measurement Mode>
Table 16.1. First data Determination Time
EMODE [2:0]
EFC= “0H”
EFC= “1H”
EFC [2:0]
EFC= “2H” EFC= “3H”
EFC= “4H”
EFC= “5H”
Unit
Single Shot Mode 2.309
1.157
0.581
0.293
0.149
0.077
Continuous Node0 2.309
1.157
0.581
0.293
0.149
0.077
Continuous Mode1 2.309
1.157
0.581
0.293
0.149
0.077 sec
Continuous Mode2 2.309
1.157
0.581
0.293
0.149
0.077
Continuous Mode3 2.309
1.157
0.581
0.293
0.149
0.077
Note:
* 18. In Switch Mode, the first data determination time is defined as the time between “Power on Reset
and determining INT output measurement data”. The first data determination time is 0.02 second
longer than time shown in Table 16.1, in Switch Mode.
17. Data Sampling Period
The data sampling period is defined as the time in which AK9753 updates an IR measurement data
periodically after determining the first data. The data sampling period depends on Measurement Mode
setting and Digital Filter setting. Since the data sampling period also depends on the OCS frequency,
Min / Max. is Typ. ±10%.
<Data Sampling Period of IR Sensor in each Measurement Mode>
Table 17.1. Data Sampling Period (Typ.) of IR Sensor
EMODE [2:0]
EFC= “0H”
EFC= “1H”
EFC [2:0]
EFC= “2H” EFC= “3H”
EFC= “4H”
EFC= “5H”
Unit
Continuous Mode 0 0.576
0.288
0.144
0.072
0.036
0.018
Continuous Mode 1
Continuous Mode 2
4.608
9.216
2.304
4.608
1.152
2.304
0.576
1.152
0.288
0.576
0.144
0.288
sec
Continuous Mode 3 18.432
9.216
4.608
2.304
1.152
0.576
<Data Sampling Period of Temperature Sensor data in each Measurement Mode>
The data sampling period of the temperature sensor is changed by changing EMODE [2:0] as shown in
Table 17.2. The data sampling period of the temperature sensor does not depend on the digital filter
setting (EFC [2:0]).
Table 17.2. Data Sampling Period (Typ.) of Temperature Sensor
EMODE [2:0]
Period
Unit
Continuous Mode 0
0.576
Continuous Mode 1
Continuous Mode 2
4.608
9.216
sec
Continuous Mode 3
18.432
017005237-E-00
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2017/04