SHT21S (SENSIRION)  teplota/ vlhkosti 0÷100% RH  ±0,2% ,2.1÷3.6VDC

Humidity and Temperature Sensor
 Fully calibrated
 SDM interface convertible to analog output
 Low power consumption
 Excellent long term stability
 DFN type package – reflow solderable

SHT21S, the new humidity and temperature sensor of  Sensirion is about to set new standards in terms of size 
and intelligence: Embedded in a reflow solderable Dual Flat No leads (DFN) package of 3 x 3mm foot print and 1.1mm height it provides calibrated, linearized signals in analog Sigma Delta Modulated (SDM) format.
With a completely new designed CMOSens® chip, a reworked capacitive type humidity sensor and an
improved band gap temperature sensor the performance level has been lifted even beyond the outstandingreliability level of the previous sensor generation (SHT1x and SHT7x). For example, measures have been taken to stabilize the behavior at high humidity levels.

Sensor Chip
SHT21S feature a generation 4C CMOSens® chip. 
Besides the capacitive relative humidity sensor and the 
band gap temperature sensor, the chip contains an 
amplifier, A/D converter, OTP memory and a digital 
processing unit.

Material Contents
While the sensor itself is made of Silicon the sensors’ 
housing consists of a plated Cu lead-frame and green 
epoxy-based mold compound. The device is free of Pb, Cd 
and Hg – hence it is fully RoHS and WEEE compliant.

Additional Information 
Additional information such as Application Notes is 
available from the web page www.sensirion.com/sht21. 
For more information please contact Sensirion via 
info@sensirion.com