SHTW1 Digital WLCSP Humidity & Temperature Sensor0 pages

Data Sheet SHTW1
WLCSP Humidity and Temperature Sensor IC

Ultra-small WLCSP: 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

Product Summary
The SHTW1 is a digital humidity and temperature sensor
in a wafer-level chip-scale package (WLCSP). This type
of package opens up a new category of ultra-small
humidity sensors which are suitable for applications with
the tightest space constraints. The SHTW1 is designed
especially for high-volume consumer electronics
applications. 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.

Block diagram

Benefits of Sensirion’s CMOSens® Technology

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 SHTW1 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
SHTW1 offers an unprecedented performance-to-price
ratio. Tape and reel packaging together with suitability for
standard SMD assembly processes make the SHTW1
predestined for high-volume applications.

High reliability and long-term stability
Industry-proven technology with a track record of
more than 10 years
Designed for mass production
Optimized for lowest cost
Best signal-to-noise ratio

RH sensor

T sensor

Signal conditioning

Signal conditioning

analog

ADC

digital

Contents of this Data Sheet
1
2
3
4
5
6
7
8
9
10

Humidity and Temperature Sensor Specifications ............ 2
Electrical Specifications .................................................... 3
Timing Specifications ........................................................ 4
Interface Specifications ..................................................... 5
Operation and Communication ......................................... 6
Quality ............................................................................... 9
Packaging and Traceability ............................................... 9
Ordering Information ......................................................... 9
Technical Drawings ......................................................... 10
Further Information.......................................................... 12

www.sensirion.com

Data processing and system control
Calibration mem.
VDD

VSS

I2C interface
SDA

SCL

Figure 1 Functional block diagram of the SHTW1.

Version 2 – August 2015

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