Sensor performance

Relative humidity

table 1 humidity characteristics table △

RH(%RH)

0

10

20

30

40

50

60

70

80

90 100

Figure 2 The maximum error of relative humidity at 25 °C

1.

This accuracy is the test accuracy of the sensor at a

factory voltage of 3.3V at 25 °C . This value does not

include hysteresis and nonlinearity and only applies

to Non-condensing conditions. 2 The time required to

achieve a first-order response of 63% at 25 ° C and 1 m /

s airflow.

2.

Normal operating range: 0-80% RH, beyond this range,

sensor readings will be biased (drift <3%

RH after 200 hours at 90% RH humidity ) . The scope of

work is further limited to -40– 80 °C .

3.

If there are volatile solvents, irritating tapes, adhesives,

and packaging materials around the sensor, the

readings may be high. Please refer to the relevant

documents for detailed instructions.

4.

The minimum and maximum values of supply current and power are based

on VDD = 3.3V and T < 60 ° C conditions. The average is the value measured

once every two seconds.

Temperature

table 3 temperature characteristics table

-40

-20

0

20

40

60

80

Figure 3 Typical temperature error and maximum error

5.

The response time depends on the thermal conductivity of the sensor

substrate.

6.

Contact surface means The metal layer on the PCB where the SMD pads

are soldered.

7.

Solder mask The top layer of the PCB covers the insulating layer on the

connecting line.

8.

The type of solder is related to the size of the internal particles of the

solder. Type 3 sizes range from 25 – 45 μm powder.

9.

75% RH can be easily saturated NaCl is generated.

parameter

condtn

min

typ

max

unit

Resolution

typical

0.024

%RH

Accuracy

typical

±2

%RH

maximum See Figure 2

%RH

Repeatability

±0.1

%RH

Hysteresis

±1

%RH

Nonlinear

<0.1

%RH

Response

t 63%

8

S

scope

extended

0

100

%RH

Drift

normal

<0.5

%RH/yr

parameter

condtn

min

typ

max

unit

Resolution

typical

0.01

℃

Accuracy

typical

±0.3

℃

maximum

See Figure 3

℃

Repeatability

±0.1

℃

Hysteresis

±0.1

℃

Response

t 63%

5

30

S

scope

extended3

-40

85

℃

drift

<0.04

℃/yr

±0

±2

±4

±6

±8

±10

最大值

典型值

±0.0

±0.5

±1.0

±1.5

±2.0

最大值

典型值