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SHT21 - NEW Digital Humidity Sensor (RH&T)

Smallest relative humidity sensor for a multitude of applications: "size that inspires"!

The extremely small SHT21 digital humidity sensor and temperature sensor integrates sensors, calibration memory and digital interface on 3x3mm footprint. Additionally the humidity sensor provides electronic read-out of tracking information. The complete over-moulding of the sensor chip – with the exception of the humidity sensor area – protects the humidity and temperature sensor against external impact and leads to an excellent stability against aging, shock and volatile chemicals.

Features

  • Output:
I2C digital, PWM and SDM/analog Volt interface
  • Energy consumption:
1.5uW (at 8 bit, 1 measurement / s)
  • RH operating range:
0 – 100% RH
  • T operating range:
-40 – +125°C (-40 – +257°F)
  • RH response time:
8 sec (tau63%)

  • Maximal accuracy limits for relative humdity and temperature:

Accuracy relative humidity SHT21        Accuracy temperature SHT21

Delivery Conditions

  • Packaging:
Tape & Reel, sealed in ESD bag
  • Packaging sizes:
400, 1500 and 5000 pieces per reel

Time Schedule & Samples

Start of serial production for SHT21 is planned for April 2010 such that first shipments can be made towards the end of that month. Currently C-samples are distributed by free sample promotion – sign in and experience the outstanding performance of the humidity sensor! C-samples are identical to sensors from serial production, find respective datasheet on the document list. Datasheets of earlier sample versions are available upon request – please be aware that coefficients for calculating physical values have been changed.

 

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the new humidity sensor SHT21
    
    Humidity Sensor SHT21 (DFN)

 
  Technical Documents  
 

- Datasheet SHT21
  (for C samples)

  - Datasheet SHT21P (PWM)
  - Datasheet SHT21S (SDM)
  - Certificate of Calibration
  - RoHS Compliance
  - SHT21 STEP-File
   
  Application Notes
  - Electronic Identification Code
  - EMS, EMC and Latchup
  Introduction to Humidity
  - Most Important Formulae
  - Sample Code SHT21 (.pdf)
  - Sample Code SHT21 (C-file)
   
  Press Release
   
  Evaluation Kit EK-H4
   
  Free Sample Promotion

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