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MEMS type Temperature and Humidity Sensor WHT20B

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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PARAMETER

Specification Product Size

Stable1. humidity characteristic

Parameter	Condition	Min	Typical	Max	Unit
Resolution	Typical		0.01		%RH
Accuracy error1	Typical		±3.0		%RH
Accuracy error1	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
Accuracy error	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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MEMS Temperature and Humidity Sensor WHT20

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