MEMS type Temperature and Humidity Sensor WHT20B


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  • WHT20B.png

Summary:

The WHT20B T/H sensor is embedded in a reflow friendly dual row flat pinless SMD package, where temperature and humidity signals can be read on different pins, with a base of 3.0 x 3.0 mm and a height of 1.0 mm. Sensor output calibrated digital signal, standard I2C format.
WHT20B temperature and humidity sensor, including a new design of ASIC dedicated chip built-in transistor Vbe temperature characteristics, to achieve high precision temperature detection; At the same time, a capacitive humidity chip is included, in which the change of dielectric constant of the hygroscopic material realizes the environmental humidity detection. And combined with the latest integrated circuit signal processing technology to form a dual chip solution. It has the advantages of small size, low power consumption, high reliability and good compatibility.

Application
Home appliance fields: home appliance, humidity control, HVAC, dehumidifiers, smart thermostats, and room monitors etc ;
Industrial fields: automobiles, testing equipment, and automatic control devices;
Other fields: data loggers, weather stations, medical and other related temperature and humidity detection devices.

Feature:

* High accuracy ±3.0% RH and ±0.5℃ 
* Wide power supply voltage range, from 2.0V to 5.5V
* SMD package suitable for reflow soldering
* Quick response and strong anti-interference ability
* Excellent long-term stability under high humidity condition
 

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APPLICATION

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PARAMETER

Specification Product Size

Stable1. humidity characteristic

Parameter

Condition

Min

Typical

Max

Unit

Resolution

Typical

 

0.01

 

%RH

Accuracy error1

Typical

 

±3.0

 

%RH

Max

See figure 1

 

%RH

Repeatability

 

 

±0.1

 

%RH

Hysteresis

 

 

±1.0

 

%RH

Non-linear

 

 

<0.1

 

%RH

Response time2

t63%

 

<8

 

s

Scope of work

extended3

0

 

100

%RH

Prolonged Drift4

Normal

 

<0.5

 

%RH/yr

Stable2. Temperature characteristic

Parameter

Condition

Min

Typical

Max

Unit

Resolution

Typical

 

0.01

 

°C

Accuracy error

Typical

 

±0.5

 

°C

Max

See figure2

 

°C

Repeatability

 

 

±0.1

 

°C

Hysteresis

 

 

±0.1

 

°C

Response time5

t63%

5

 

30

s

Scope of work

Extended3

-40

 

85

°C

Prolonged Drift

 

 

<0.04

 

°C/yr

 

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