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HTU21D Humidity/Temperature Sensor with analoge output

htu21p
HTU21-P
htu21df
HTU21-PF (with PTFE filter membrane)
DESCRIPTION

Because of his modular structure consisting of a capacitive polymer measuring cell and a special developed signal conditioning ASIC the HTU21P provides a high accuracy, a low hysteresis and temperature drift and also an excellent long time stability. The output signal is a 120Hz PWM-signal, which can be transformed by an additional low pass filter in an analogue DC-output signal. Through the pin-programming (SCK to VDD or SCK to GND) the output can be switched between a relative humidity and a temperature value.

The HTU21P is a low-power-sensor with a maximum current consumption of 14µA/3Volt, so that he is suitable for mobile applications. The extended measuring range for relative humidity is between 0 and 100%. The accuracy varied to ±2 in the range of 20-80% (@25°C) up to 5% in the extended range. Temperature range is characterized by ±0.3°C (@25°C) und covers the range between -40 and +125°C. Relative humidity and temperature resolution constitutes by 10bit respective 12bit.

After long term saturation phase the operating state of the HTU21P is operational after 10 seconds.

The sensor is packaged in a reflow solderable Dual Flat No leads (DFN) housing. The 3x3x0.9mm³ foot print allows a construction of sensor systems with small dimensions.

With made improvements and the miniaturization of the sensor the performance-to-price ratio has been improved.

For Protection against dust, liquid film and contamination the humidity/temperature sensor HTU21P is also available with a PTFE filter/membrane as the version HTU21P(F).

FEATURES
  • Wide humidity range 0-100%RH
  • Wide temperature range -40-125°C
  • Analoge output
  • Humidity accuracy ±2%RH typical
  • 1.5-3.6 Volt operation
  • Instantaneous desaturation after long periods in saturation phase
  • Compatible with automatized assembly (reflow) processes,
  • Small dimensions (DFN-package)
  • RoHS suitable and Pb free
APPLICATIONS
  • Automotive (passenger compartment)
  • Home Appliances
  • Medical Equipment
  • Printers and copiers
  • Humidifiers and HVAC systems
  • Building Automation
  • Weather monitoring
  • Security systems


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For information according to prices, delivery dates and sample ordering or for technical questions please contact info@amsys.de.

Amsys reserves the right for changes concerning dimensions, technical data and other details without previous announcement.