Datasheet

www.sensirion.com Version 4.1 – September 2008 1/11
Datasheet SHT1x (SHT10, SHT11, SHT15)
Humidity and Temperature Sensor
• Fully calibrated
• Digital output
• Low power consumption
• Excellent long term stability
• SMD type package – reflow solderable
Dimensions
Figure 1: Drawing of SHT1x sensor packaging, dimensions in
mm (1mm = 0.039inch). Sensor label gives “11” for SHT11 as
an example. Contacts are assigned as follows: 1:GND, 2:DATA,
3:SCK, 4:VDD.
Sensor Chip
SHT1x V4 – for which this datasheet applies – features a
version 4 Silicon sensor chip. Besides a humidity and a
temperature sensor the chip contains an amplifier, A/D
converter, OTP memory and a digital interface. V4 sensors
can be identified by the alpha-numeric traceability code on
the sensor cap – see example “A5Z” code on Figure 1.
Material Contents
While the sensor is made of a CMOS chip the sensor
housing consists of an LCP cap with epoxy glob top on an
FR4 substrate. The device is fully RoHS and WEEE
compliant, thus it is free of Pb, Cd, Hg, Cr(6+), PBB and
PBDE.
Evaluation Kits
For sensor trial measurements, for qualification of the
sensor or even experimental application of the sensor
there is an evaluation kit EK-H2 available including sensor,
hard and software to interface with a computer.
For more sophisticated and demanding measurements a
multi port evaluation kit EK-H3 is available which allows for
parallel application of up to 20 sensors.
Product Summary
SHT1x (including SHT10, SHT11 and SHT15) is
Sensirion’s family of surface mountable relative humidity
and temperature sensors. The sensors integrate sensor
elements plus signal processing on a tiny foot print and
provide a fully calibrated digital output. A unique
capacitive sensor element is used for measuring relative
humidity while temperature is measured by a band-gap
sensor. The applied CMOSens® technology guarantees
excellent reliability and long term stability. Both sensors
are seamlessly coupled to a 14bit analog to digital
converter and a serial interface circuit. This results in
superior signal quality, a fast response time and
insensitivity to external disturbances (EMC).
Each SHT1x is individually calibrated in a precision
humidity chamber. The calibration coefficients are
programmed into
an OTP memory on the chip. These
coefficients are used to internally calibrate the signals
from the sensors. The 2-
wire serial interface and internal
voltage regulation allows for easy and fast system
integration. The tiny size and low power consumption
ma
kes SHT1x the ultimate choice for even the most
demanding applications.
SHT1x is supplied in a surface-
mountable LCC (Leadless
Chip Carrier) which is approved for standard reflow
soldering processes. The same sensor is also available
with pins (SHT7x) or o
n flex print (SHTA1).
A5Z
1
2
NC
NC
NC
NC
NC
NC
3.3 ±0.1
4.93 ±0.05
2.0 ±0.1 1.5 ±0.1
7.47
±0.05
4.2
±0.1
1.2
7
±0.05
1.83
±0.0
5
5.2
±0.2
0.6
±0.1
sensor opening 2.5 ±0.1
0.8 ±0.1
3
4
11
0.95
±0.1
1.5 ±0.2
2.6 MAX
2.2
MAX