HTU21D Digital Humidity/Temperature Sensor
The new digital sensor HTU21D is a fully self
contained capacitive humidity sensor combined with a bandgap
temperature sensor. Every product is individually calibrated,
compensated and finally tested. The HTU21D sensors
are dedicated humidity and temperature plug and play sensors for OEM
applications where reliable and accurate measurements are needed. HTU21D
sensors are characterized by a 0 – 100% RH-range and by an
extended temperature range. The humidity and temperature
digital outputs are in an I²C format and suitable for all
micro-controllers. The resolution of HTU21D
sensor can be changed by command (8/12bit up to 12/14bit for RH/T),
whereby the measurement time and the current consumption can be
modified. With the very low power consumption the sensors are
dedicated for battery powered applications. Furthermore, low battery
can be detected and a checksum improves communication reliability.
Humidity and temperature response time as well as the recovering
time (from condensing humidity) are in the range of a few seconds.
Lot identification is printed on the sensor and an electronic
identification code is stored on the chip – which can be read
out by command.
Embedded in a reflow solderable Dual Flat No leads (DFN) package of
3 x 3mm foot print with 0.9mm height the combined humidity and
temperature sensor is designed for high volume and cost sensitive
applications with tight space constraints. With made improvements
and the miniaturization of the sensor the performance-to-price ratio
has been improved.
Optional PTFE filter/membrane (F) protects the HTU21D
against dust, water immersion as well as against contamination by
AMSYS also offers the HTU21D mounted on a PCB with pins for
prototyping and batch production (PHTU21) to faciliate the manual
mounting of the sensor.
- Wide humidity range 0-100%RH
- Wide temperature range -40-125°C
- Digital I²C- interface
- Humidity accuracy ±2%RH typical
- 1.5 - 3.6Volt operation
- Low power dissipation typ. 2.7μW
- Instantaneous desaturation after long periods in saturation
- Compatible with automatized assembly (reflow) processes,
- Electronical identification code
- Small dimensions (DFN-package)
- Adjustable resolution
- RoHS suitable and Pb free
- Automotive (passenger compartment)
- Home Appliances
- Medical Equipment
- Printers and copiers
- Humidifiers and HVAC systems
- Building Automation
- Weather monitoring
- Security systems
- Multi media - smart phone, tablet
For information according to prices, delivery dates and sample
ordering or for technical questions please contact firstname.lastname@example.org.
Amsys reserves the right for changes concerning dimensions,
technical data and other details without previous announcement.