www.sensirion.com

Version 2 – August 2016

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Data Sheet SHTW2

WLCSP Humidity and Temperature Sensor IC

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

Fully calibrated and reflow solderable



Ultra-low power consumption

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Power-up and measurement within 1 ms

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1.8 V supply voltage

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Typical accuracy: ±3 %RH and ±0.4 °C

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High reliability and long-term stability

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Industry-proven technology with a track record of

more than 10 years

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Designed for mass production

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Optimized for lowest cost



Best signal-to-noise ratio

Contents of this Data Sheet

1

Humidity and Temperature Sensor Specifications ... 2

2

Electrical Specifications ........................................... 3

3

Timing Specifications ............................................... 4

4

Interface Specifications............................................ 5

5

Operation and Communication ................................ 6

6

Quality...................................................................... 9

7

Package and Traceability......................................... 9

8

Technical Drawings................................................ 10

9

Further Information ................................................ 12

Important Notices............................................................ 14

Block diagram

Figure 1 Functional block diagram of the SHTW2.

RH sensor

T sensor

Signal conditioning

Signal conditioning

ADC

Calibration mem.

VDD

VSS

SDA

SCL

Data processing and system control

analog

digital

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.

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

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.