STS21

NRND

±0.2°C Digital temperature sensor

A 3x3mm, fully calibrated digital temperature sensor with impressive performance.

Based on the same chip as the successful and industry proven SHT2x family of humidity and temperature sensors, the STS21 offers the same superior performance and space saving 3x3mm footprint. The temperature sensor features a different I²C address than the SHT2x and is pin compatible. Therefore it is custom-made for solutions in which temperature measurement is a prerequisite and humidity measurement is optional, as the same hardware can be used for both options.

The outstanding accuracy and low power consumption paired with a competitive price make the STS21 an ideal solution for applications with high demands on both performance and economy.

Successor product

Name Description Series Category
STS40
±0.2°C Ultra-low-power temperature sensor STS4x Temperature

Specification

Temperature
Typ. temperature accuracy
0.2
0.2 °C
Operating temperature range [°C]
-40 - 125
-40 - 125 °C
Response time (τ63%)
5
5 s
Generic
Supply voltage
2.1 - 3.6
2.1 - 3.6 V
Average supply current
300
300 uA
Max. supply current
330
330 uA
Interfaces
I²C
I²C
Size (LxWxH)
3 x 3 x 1.1
3 x 3 x 1.1 mm
Packaging size
400, 1500, 5000
400, 1500, 5000 pcs (T&R)

Downloads

Name Type Date File Size
Datasheet STS21

12/2011

File

517.9 KB

Datasheet 12/2011 PDF 517.9 KB
Calibration certification SHT/STS

08/2021

File

110.4 KB

Certificate 08/2021 PDF 110.4 KB
REACH and RoHS declaration SHT/STS

01/2025

File

91.6 KB

Certificate 01/2025 PDF 91.6 KB
Temperature brochure chinese

08/2024

File

1.1 MB

Flyer 08/2024 PDF 1.1 MB
Temperature brochure japanese

03/2023

File

569.9 KB

Flyer 03/2023 PDF 569.9 KB
Temperature product flyer

10/2024

File

1.1 MB

Flyer 10/2024 PDF 1.1 MB

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Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.