Sensirion to start production of SHT21 sensor

Published: 29-Mar-2010
Regulatory

Swiss manufacturer says it is the smallest digital humidity sensor in the world

Sensirion, a Swiss manufacturer of CMOS-based sensor components and systems, is to begin serial production of the SHT21 next month (April).

The SHT21 consists of a newly designed sensor chip encapsulated in a DFN 3-0 package. With this encapsulation the chip is completely over-moulded, except for the humidity sensing area. This reduces the component’s size to 3x3mm with a height of 1.1mm. The company says it also provides protection against condensation and harsh environments, therefore giving outstanding long-term stability.

Typical sensor accuracy is ±2% RH over 20–80% RH and ±0.3 °C over 25–42°C.

A scan path routine enables detailed sensor quality checking, while individual detailed tracking information on the chip can be read out by a simple command. Additionally, the SHT21 is reflow solderable without any degradation of sensor performance. The sensor is provided on tape and reel to facilitate trouble-free handling.

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