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WLCSP Digital Humidity and Temperature Sensor - SHTW2

Interface: I2C
Supply voltage: 1.8 V
Power consumption: 2μW (at 1 reading per second in low power mode)
Measuring range (RH): 0 - 100 % relative humidity
Measuring range (T): -30 to +100°C (-22 to +212°F)
Response time (RH): 8s (tau63%)
Package type: Wafer-Level-Chip-Scale-Package (WLCSP)

Model Number: SHTW2
Data Sheet:

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Product Specification

SHTW2 Digital Humidity and Temperature Sensor Product Summary
The SHTW2 is a digital humidity and temperature sensor in a flip chip package. This type of package opens up a new category of ultra-small humidity sensors which are suitable for applications with the tightest space constraints. At the same time, the flip chip package impresses with its pure simplicity.

The sensor is based on Sensirion’s CMOSens ? technology, which offers a complete sensor system on a single chip, consisting of a capacitive humidity sensor, a bandgap temperature sensor, analog and digital signal processing, A/D converter, calibration data memory, and a digital communication interface supporting I2C fast mode.

The sensor covers a humidity measurement range of 0 to 100 %RH and a temperature measurement range of -30 to 100 °C with a typical accuracy of ±3 %RH and ±0.4°C. The operation voltage of 1.8 V and the low power consumption make the SHTW2 suitable for mobile or wireless applications running on the tightest power budgets. With the industry-proven quality and reliability of Sensirion’s humidity and temperature sensors and constant accuracy over a large measurement range, the SHTW2 offers an unprecedented performance-to-price ratio. Tape and reel packaging together with suitability for standard SMD assembly processes make the SHTW2 predestined for high-volume applications.

SHTW2 Digital Humidity and Temperature Sensor FEATURES
? Ultra-small flip chip package: 1.3 × 0.7 × 0.5 mm³
? Fully calibrated and reflow solderable
? Ultra-low power consumption
? Power-up and measurement within 1 ms
? 1.8 V supply voltage
? Typical accuracy: ±3 %RH and ±0.4 °C

SHTW2 Digital Humidity and Temperature Sensor Specifications
Relative Humidity

Parameter	Conditions	Value	Units
Accuracy tolerance	Typ.	±3.0	%RH
Accuracy tolerance	Max.	see Figure 2	%RH
Repeatability	-	0.1	%RH
Resolution	-	0.01	%RH
Hysteresis	-	±1	%RH
Specified range	extended	0 to 100	%RH
Response time	τ_63%	8	s
Long-term drift	Typ.	<0.25	%RH/y

Temperature

Parameter	Conditions	Value	Units
Accuracy tolerance	Typ.	±0.4	°C
Accuracy tolerance	Max.	see Figure 3	°C
Repeatability	-	0.1	°C
Resolution	-	0.01	°C
Specified range	-	-30 to +100	°C
Response time	τ_63%	<5 to 30	s
Long-term drift	Normal range	<0.02	°C/y

Other Series:

Series	Typ. Humidity Accuracy %RH	Typ. Temperature Accuracy °C	Supply Voltage Range V	Interface	Package Size (L x W x H) mm
SHT30	±2	±0.2	2.4 to 5.5	I2C, analog voltage	2.5 x 2.5 x 0.9
SHT31	±2	±0.2	2.4 to 5.5	I2C, analog voltage	2.5 x 2.5 x 0.9
SHT35	±1.5	±0.1	2.4 to 5.5	I2C	2.5 x 2.5 x 0.9
SHTW1	±3	±0.4	1.62 to 1.98	I2C	1.3 x 0.7 x 0.5
SHTW2	±3	±0.4	1.62 to 1.98	I2C	1.3 x 0.7 x 0.5
SHTC1	±3	±0.3	1.62 to 1.98	I2C	2 x 2 x 0.8
SHT20	±3	±0.3	2.1 to 3.6	I2C, PWM, SDM	3 x 3 x 1.1
SHT21	±2	±0.3	2.1 to 3.6	I2C, PWM, SDM	3 x 3 x 1.1
SHT25	±1.8	±0.2	2.1 to 3.6	I2C	3 x 3 x 1.1
SHT10*	±4.5	±0.5	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT11*	±3	±0.4	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT15*	±2	±0.3	2.4 to 5.5	Digital Sbus	7.5 x 4.9 x 2.6
SHT71	±3	±0.4	2.4 to 5.5	Digital Sbus	19.5 x 5.08 x 3.1
SHT75	±1.8	±0.3	2.4 to 5.5	Digital Sbus	19.5 x 5.08 x 3.1
*Not recommended for new design (NRND); newer products available