TH02 Datasheet, PDF (18/26 Pages) List of Unclassifed Manufacturers – D IGITAL I 2C H UMIDITY AND TEMPERATURE S ENSOR

TH02
3.1.3. Fast Conversion Mode
The time needed to perform a temperature or RH measurement can be reduced from 35 ms (typical) to 18 ms
(typical) by setting FAST (D5) in CONFIG (register 0x03). Fast mode reduces the total power consumed during a
conversion or the average power consumed by the TH02 when making periodic conversions. It also reduces the
resolution of the measurements. Table 14 is a comparison of the normal and fast modes.
Table 14. Normal vs. Fast Mode
Parameter
Value
t_CONV (typical)
Temperature resolution
RH resolution
Normal Mode
35 ms
14-bit
12-bit
Fast Mode
18 ms
13-bit
11-bit
3.1.4. Heater
The TH02 relative humidity sensor contains an integrated, resistive heating element that may be used to raise the
temperature of the humidity sensor. This element can be used to drive off condensation or to implement dew-point
measurement when the TH02 is used in conjunction with a separate temperature sensor such as another TH02.
The heater can be activated by setting HEAT (D1) in CONFIG (register 0x03). Turning on the heater will reduce the
tendency of the humidity sensor to accumulate an offset due to "memory" of sustained high humidity conditions.
When the heater is enabled, the reading of the on-chip temperature sensor will be affected (increased).
3.1.5. Device Identification
The TH02 device and its revision level can be determined by reading ID (register 0x11). Table 15 lists the values
for the various device revisions and may include revisions not yet in existence.
Table 15. Revision Values
Device ID Value
D[7:4]
D[3:0]
Device Revision
Type
Level
0101
0000
TH02
B
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