Table of Contents
Advertisement
Quick Links
STS32/33-DIS
th
3
Generation, High-Reliability, Certified
Digital Temperature Sensor
Features
•
Accuracy ±0.4 °C
•
VDD = 2.15 V ... 5.5 V
•
Low drift, <0.01 °C per year
•
Sensor-specific calibration certificate acc. to
ISO 17025:2017, 3-point temp. calibration
General Description
The STS32/33-DIS are Sensirion's new low-drift digital calibrated and ISO17025 certified
temperature sensors. Both rely on the industry proven CMOSens® technology, enabling
increased computational power, reliability and improved accuracy specifications compared to
its predecessors. Its functionality includes enhanced signal processing, two distinctive and user
selectable I2C addresses and communication speeds of up to 1 MHz. The DFN package has
a footprint of 2.5 x 2.5 mm
identified by its unique serial number and is supplied with an ISO17025-accredited calibration
certificate. The calibration certificate comprises three temperatures, −30 °C, 5 °C, and 70 °C.
In terms of communication, electrical specifications, and footprint, the SHT33-DIS is fully identical
with the STS3x-DIS.
Device Overview
Products
ISO17025 3-point calibration certificate
STS32-DIS
ISO17025 3-point calibration certificate
STS33-DIS
SCAN ME to give feedback and help us to
improve this document. —Thank you!
www.sensirion.com / D1
2
while keeping a height of 0.9 mm. Every STS32 or STS33 is
Details
accuracy profile 1
accuracy profile 2
Full product list on page 22
Version 3 – December 2022
•
Operating range: −40...125 °C
•
True NIST-traceability, unique serial number
•
JEDEC JESD47 qualification
•
I2C FM, CRC checksum, multip. I2C addr.
•
Tiny 8-pin DFN package with ALERT pin
Functional Block Diagram
1/24
Advertisement
Table of Contents
Related Manuals for SENSIRION STS32-DIS
Summary of Contents for SENSIRION STS32-DIS
-
Page 1: Features
Tiny 8-pin DFN package with ALERT pin General Description The STS32/33-DIS are Sensirion’s new low-drift digital calibrated and ISO17025 certified temperature sensors. Both rely on the industry proven CMOSens® technology, enabling increased computational power, reliability and improved accuracy specifications compared to its predecessors. -
Page 2: Table Of Contents
4.13 Conversion Signal Output ........................17 4.14 Communication Timing ..........................18 5 Packaging ................................19 5.1 Traceabilty ............................... 19 5.2 Package Outline ............................19 5.3 Land Pattern ..............................20 6 Shipping Package ..............................21 Version 3 – December 2022 www.sensirion.com / D1 2/24... - Page 3 7 Quality and Material Contents........................... 21 8 Product Nomenclature ............................22 9 Ordering Information ............................22 10 Bibliography ................................22 11 Revision History ..............................23 Version 3 – December 2022 www.sensirion.com / D1 3/24...
-
Page 4: Sensor Performance
Every STS33/32 is individually tested and calibrated and is identifiable by its unique serial number (see section 4.11 for details on the serial number). For the calibration, Sensirion uses transfer standards, which are subject to a scheduled calibration procedure. The calibration of the reference, used for the calibration of the transfer standards, is NIST traceable through an ISO/IEC 17025 accredited laboratory. -
Page 5: Iso17025 Certification With 3-Point Calibration Data
CIPM Mutual Recognition Arrangement (CIPM MRA). Reel-wise calibration certificates and data for each STS32/33 can be downloaded through a web- client and through an API from libellus.sensirion.com, which allows for efficient processing by automated systems. For detailed documentation, kindly refer to the Libellus documentation. -
Page 6: Electrical Specifications
Heater power Heater running Heater supply voltage Table 3. Electrical specifications, typical values are valid for T = 25 °C, min. & max. values for − 40 °C … 125 °C. Version 3 – December 2022 www.sensirion.com / D1 6/24... -
Page 7: Timings
Table 5. Absolute maximum ratings. Values may be only applied for short time periods. The recommended storage temperature range is 10-50 °C. Please consult the document “SHTxx Handling Instructions” [4] for more information. According to ANSI/ESDA/JEDEC JS-001-2014; AEC-Q100-002. According to ANSI/ESD S5.3.1-2009; AEC-Q100-011. Version 3 – December 2022 www.sensirion.com / D1 7/24... -
Page 8: Pin Assignment
(see for example Section 7.1 of NXPs I2C Manual for more details [1]). It should be noted that pull-up resistors may be included in I/O circuits of microcontrollers. It is recommended to wire the sensor according to the application circuit as shown in Figure 2. Version 3 – December 2022 www.sensirion.com / D1 8/24... -
Page 9: Die Pad (Center Pad)
Its function is explained in more detail in section 4. If not used it is recommended to leave the pin floating or to connect it to VDD with a series Version 3 – December 2022 www.sensirion.com / D1 9/24... -
Page 10: Operation And Communication
Table 8. They differ with respect to repeatability (low, medium and high) and clock stretching (enabled or disabled). The repeatability setting influences the measurement duration and thus the overall energy consumption of the sensor. This is explained in section 2.2. Version 3 – December 2022 www.sensirion.com / D1 10/24... -
Page 11: Readout Of Measurement Results For Single Shot Method
Table 9. They differ with respect to repeatability (low, medium and high) and data acquisition frequency (0.5, 1, 2, 4 & 10 measurements per second, mps). Clock stretching cannot be selected in this mode. Version 3 – December 2022 www.sensirion.com / D1 11/24... -
Page 12: Readout Of Measurement Results For Periodic Mode
N.B.: At the highest mps setting self- heating of the sensor might occur.) and the communication stops. After the read-out command fetch data has been issued, the data memory is cleared, i.e. no measurement data is present. Version 3 – December 2022 www.sensirion.com / D1 12/24... -
Page 13: Break Command/ Stop Periodic Data Acquisition Mode
In order to start the soft reset procedure the command as shown in Table 12 should be sent. It is worth noting that the sensor reloads calibration data prior to every measurement by default. Version 3 – December 2022 www.sensirion.com / D1 13/24... -
Page 14: Heater
It can be switched on and off by command, see table below. The status is listed in the status register. After a reset the heater is disabled (default condition). Version 3 – December 2022 www.sensirion.com / D1 14/24... -
Page 15: Status Register
(SNB_3 to SNB_0 in Table 17, SNB_0 is the LSB, whereas SNB_3 is the MSB) constitute a unique serial number with a length of 32 bit. This serial number can be used to individually identify each sensor. Version 3 – December 2022 www.sensirion.com / D1 15/24... - Page 16 Write data checksum status ‘0’ '0': checksum of last write transfer was correct '1': checksum of last write transfer failed Table 18. Description of the status register. Version 3 – December 2022 www.sensirion.com / D1 16/24...
-
Page 17: Checksum Calculation
�� = (−49 + 315 ∙ ) °F ( 2 ) − 1 denotes the raw sensor output for temperature. The formulas work only correctly when S used in decimal representation Version 3 – December 2022 www.sensirion.com / D1 17/24... -
Page 18: Communication Timing
Figure 3. Timing diagram for digital input/output pads. SDA directions are seen from the sensor. Bold SDA lines are controlled by the sensor, plain SDA lines are controlled by the micro-controller. Note that SDA valid read time is triggered by falling edge of preceding toggle. Version 3 – December 2022 www.sensirion.com / D1 18/24... -
Page 19: Packaging
The third letter (A) represents the manufacturing year (4 = 2014, 5 = 2015, etc). The last three digits (BCD) represent an alphanumeric tracking code. That code can be decoded by Sensirion only and allows for tracking on batch level through production, calibration, and testing – and will be provided upon justified request. -
Page 20: Land Pattern
70% – 90% of the die pad area –thus it should have a size of about 0.9 mm x 1.6 mm. For information on the soldering process and further recommendation on the assembly process please consult the Application Note SHTxx_STSxx_Assembly_of_SMD_Packages [3], which can be found on the Sensirion webpage. Recommended Land Pattern Recommended Stencil Aperture 2.55... -
Page 21: Shipping Package
Qualification of STS32/33-DIS is performed based on the JEDEC JESD47 qualification test method. The device is fully RoHS and WEEE compliant, e.g. free of Pb, Cd, and Hg. For general remarks of best practice in processing Sensirion temperature sensors please refer to temperature part of the handling instructions [4]. -
Page 22: Product Nomenclature
[1] NXP Semiconductors, "User manual UM10204," vol. Rev. 6, 2014. [2] Sensirion, "SHTxx Design Guide," [Online]. Available: www.sensirion.com. [3] Sensirion, ""SHTxx Assembly of SMD Packages"," [Online]. Available: www.sensirion.com. [4] Sensirion, "Handling Instructions for Humidity Sensors," 2020. [5] K. Ehrhorn, "A Humidity Sensor and a Methode for Manufacturing the Same.". UK, DE, FR, NL, DM, BE, US, CN Patent EP1810013, US7741950, CN101040181, 2005. -
Page 23: Revision History
11 Revision History Date Version Page(s) Changes October 2020 Initial release November 2020 2, all Incorporation of STS33 December 2022 Reformatting Remodeling of title page, format, and features Inserting Product Nomenclature Version 3 – December 2022 www.sensirion.com / D1 23/24... - Page 24 Warranty SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this product shall be of the quality, material and workmanship defined in SENSIRION’s published specifications of the product. Within such period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION’s discretion, free of charge to the Buyer,...
Need help?
Do you have a question about the STS32-DIS and is the answer not in the manual?
Questions and answers