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Version:V1.0 —— May 2021

AHT20 Data Sheet

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Trigger measurement data

Read temperature and humidity data

Note: The sensor needs time to collect. After the host sends a measurement command (0xAC), delay more than 80

milliseconds before reading the converted data and judging whether the returned status bit is normal. If the status bit [Bit7] is 0,

it means that the data can be read normally. When it is 1, the sensor is busy, and the host needs to wait for the data

processing to complete.

8 Signal Conversion

8.1 Relative Humidity Conversion

The relative humidity RH can be calculated according to the relative humidity signal SRH output by SDA through the

following formula (the result is expressed in %RH):

%

100

*

)

2

S

(

[%]

RH

20

RH



8.2 Temperature Conversion

The temperature T can be calculated by substituting the temperature output signal ST into the following formula:

(The result is expressed in temperature ℃):

50

-

200

*

2

S

]

[

T

20

T ）

（

℃

