Digital sensor STS21 s the newest member of calibrated humidity and temperature sensors family SHT2x (SHT21, SHT25). In opposite to them, STS21 is able to measure only temperature, i.e. it´s suitable only for applications, where we don´t need to measure humidity. However a smaller functionality has also a significant positive aspect in a form of a substantially lower price. STS21 contains on a chip, similarly like its familiar, a temperature sensor, precise supply, low noise linear amplifier, AD converter and a serial interface with I2C output (fixed address different from SHT series).
Basic accuracy of STS21 in the 0 to +60°C temperature range is +-0.2°C. The user can choose a resolution for measuring and it can be 11-14 bits (up to 0,01°C). Despite the fact, that the sensor hasn´t guaranteed absolute accuracy of 0.01°C, such a high resolution can be beneficial for example for monitoring of a tendency (increasing/ decreasing) of temperature.
Detailed information can be found in the Sensirion STS21 datasheet.
For further information about Sensirion products please contact us at info@soselectronic.com.
Advantages/ Features:
- calibrated temperature sensor
- extremely compact dimensions 3 x 3 x 1,1 mm
- digital outpt with I2C interface (Hold/No Hold Master)
- outstanding reliability and long-term stability
- 14 bit resolution (user selectable 11-14 bit)
- extremely low power consumption
- insensitivity to external disturbances (EMC)
- SMT package DFN3-0, reflow solderable
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