Relative humidity and temperature sensor DFN package
I2C | SHT21/SHT25 Sensirion

With a size of just 3 x 3 x 1.1 mm, the SHT21 is the world's smallest digital humidity sensor. The humidity and temperature sensor consists of a sophisticated sensor chip encapsulated in a DFN 3-0 package. Over-molding provides excellent protection against ambient impact, and thus yields outstanding performance and stability.

The SHT21 is fully calibrated and provides an I2C digital interface. Analog output modes (such as PWM) are available on request. The digital communication mode enables superb low power consumption: A value in the range of 3μW at normal op-eration is well achieved. Typical sensor accuracy is ±2% RH over 20-80% RH and ±0.3 °C over 25-42 °C. Provided on tape & reel, the reflow solderable humidity sensor SHT21 is suitable for high volume applications. Furthermore, the sensor is qualified in accor-dance with automotive standard AEC-Q100 and an extended quality assurance program guarantees low PPM values.