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PDF SHT10 Data sheet ( Hoja de datos )
| Número de pieza | SHT10 | |
| Descripción | (SHT10 - SHT15) Humidity and Temperature Sensor IC | |
| Fabricantes | Sensirion | |
| Logotipo |  |
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Datasheet SHT1x (SHT10, SHT11, SHT15)
Humidity and Temperature Sensor IC
Fully calibrated
Digital output
Low power consumption
Excellent long term stability
SMD type package – reflow solderable
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).
Dimensions
1.5 ±0.2 2.0 ±0.1 1.5 ±0.1 sensor opening 2.5 ±0.1
NC
1
2 A5Z
3
4 11
NC
NC
NC
NC
NC
3.3 ±0.1
4.93 ±0.05
2.6 MAX
0.8 ±0.1
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.
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
makes 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 on flex print (SHTA1).
Sensor Chip
SHT1x V4 – for which this datasheet applies – features a
version 4 Silicon sensor chip. Besides the humidity and
temperature sensors 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 (data logging) of
the sensor there is an evaluation kit EK-H4 available
including SHT71 (same sensor chip as SHT1x) and 4
sensor channels, hard and software to interface with a
computer. For other evaluation kits please check
www.sensirion.com/humidity.
www.sensirion.com
Version 5 – December 2011
1/12
Free Datasheet http://www.datasheet-pdf.com/
1 page  
Datasheet SHT1x
resolved by routing VDD and/or GND between the two
data signals and/or using shielded cables. Furthermore,
slowing down SCK frequency will possibly improve signal
integrity. Power supply pins (VDD, GND) must be
decoupled with a 100nF capacitor if wires are used.
Capacitor should be placed as close to the sensor as
possible. Please see the Application Note “ESD, Latch-up
and EMC” for more information.
1.10 ESD (Electrostatic Discharge)
ESD immunity is qualified according to MIL STD 883E,
method 3015 (Human Body Model at ±2 kV).
Latch-up immunity is provided at a force current of
±100mA with Tamb = 80°C according to JEDEC78A. See
Application Note “ESD, Latch-up and EMC” for more
information.
2 Interface Specifications
Pin Name
Comment
1 GND Ground
2 DATA Serial Data, bidirectional
3 SCK Serial Clock, input only
4 VDD Source Voltage
NC NC Must be left unconnected
NC
1
2
3
4
A5Z
11
Table 1: SHT1x pin assignment, NC remain floating.
NC
NC
NC
NC
NC
2.1 Power Pins (VDD, GND)
The supply voltage of SHT1x must be in the range of 2.4 –
5.5V, recommended supply voltage is 3.3V. Power supply
pins Supply Voltage (VDD) and Ground (GND) must be
decoupled with a 100 nF capacitor – see Figure 10.
The serial interface of the SHT1x is optimized for sensor
readout and effective power consumption. The sensor
cannot be addressed by I2C protocol; however, the sensor
can be connected to an I2C bus without interference with
other devices connected to the bus. The controller must
switch between the protocols.
VDD GND
SHT1x
Micro-
Controller
(Master)
DATA
SCK
A5Z
VDD 11
100nF
2.4 – 5.5V
GND
(Slave)
Figure 10: Typical application circuit, including pull up resistor
RP and decoupling of VDD and GND by a capacitor.
2.2 Serial clock input (SCK)
SCK is used to synchronize the communication between
microcontroller and SHT1x. Since the interface consists of
fully static logic there is no minimum SCK frequency.
2.3 Serial data (DATA)
The DATA tri-state pin is used to transfer data in and out
of the sensor. For sending a command to the sensor,
DATA is valid on the rising edge of the serial clock (SCK)
and must remain stable while SCK is high. After the falling
edge of SCK the DATA value may be changed. For safe
communication DATA valid shall be extended TSU and THO
before the rising and after the falling edge of SCK,
respectively – see Figure 11. For reading data from the
sensor, DATA is valid TV after SCK has gone low and
remains valid until the next falling edge of SCK.
To avoid signal contention the microcontroller must only
drive DATA low. An external pull-up resistor (e.g. 10kΩ) is
required to pull the signal high – it should be noted that
pull-up resistors may be included in I/O circuits of
microcontrollers. See Table 2 for detailed I/O characteristic
of the sensor.
2.4 Electrical Characteristics
The electrical characteristics such as power consumption,
low and high level input and output voltages depend on
the supply voltage. Table 2 gives electrical characteristics
of SHT1x with the assumption of 5V supply voltage if not
stated otherwise.
Parameter
Conditions min
Power supply DC10
2.4
measuring
Supply current
average11
2
sleep
Low level output
voltage
IOL < 4 mA
0
High level output
voltage
RP < 25 kΩ
90%
Low level input
voltage
Negative going 0%
High level input
voltage
Positive going 80%
Input current on pads
Output current
on
Tri-stated (off)
typ max Units
3.3 5.5 V
0.55 1 mA
28 µA
0.3 1.5 µA
250 mV
100% VDD
20% VDD
100% VDD
1 µA
4 mA
10 20 µA
Table 2: SHT1x DC characteristics. RP stands for pull up
resistor, while IOL is low level output current.
10 Recommended voltage supply for highest accuracy is 3.3V, due to sensor
calibration.
11 Minimum value with one measurement of 8bit resolution without OTP reload
per second. Typical value with one measurement of 12bit resolution per
second.
www.sensirion.com
Version 5 – December 2011
5/12
Free Datasheet http://www.datasheet-pdf.com/
5 Page 
Datasheet SHT1x
Revision History
Date
July 2008
September 2008
April 2009
May 2010
December 2011
Version
4.0
4.1
4.2
4.3
5
Page(s)
1 – 11
3, 4
2, 7
1 – 11
1, 8, 9
Changes
New release, rework of datasheet
Adjustment of normal operating range and recommendation for antistatic bag
Amended foot note 2, communication diagram updated (Figure 17).
Various errors corrected and additional information given (ask for change protocol).
Reference to V3 sensors eliminated.
www.sensirion.com
Version 5 – December 2011
11/12
Free Datasheet http://www.datasheet-pdf.com/
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SHT10.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
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