Digital Temperature and Humidity Sensor HTU21D
HTU21D, the new humidity and temperature sensor of MEAS is about to set new standards
in terms of size and intelligence: Embedded in a reflow solderable Dual Flat No leads
(DFN) package of 3 x 3mm foot print and 1mm height it provides calibrated, linearized
signals in digital, I2C format.
HTU21D sensors are dedicated humidity and temperature plug and play transducers for
OEM applications where reliable and accurate measurements are needed. Direct interface
with a micro-controller is made possible with the module humidity and temperature
HTU21D sensors are low power consumption designed for high volume and cost sensitive
applications with tight space constraints.
Every sensor is individually calibrated and tested. Lot identification is printed on
the sensor and an electronic identification code is stored on the chip – which can
be read out by command.
Furthermore, the resolution of HTU21D sensor can be changed by command (8/12bit up to
12/14bit for RH/T), low battery can be detected and a checksum improves communication
With made improvements and the miniaturization of the sensor the performance-to-price
ratio has been improved – and eventually, any device should benefit from the cutting edge energy
saving operation mode.
1)storage temperature: -40 to 125oC
2)supply voltage: 3.8V
3)Humidity Operating Range: 1-100%RH
4)Temperature operating range: -40 to 125oC
5)VDD to GND:-0.3 to 3.6V
6)Digital I/O pins (DATA/SCK) to VDD:-0.3 to VDD+0.3v
7)-10 to +10 mA
(1)DFN type package
(2)Relative Humidity and Temperature Digital Output, I2C interface
(4)Lead free sensor, reflow solderable
(5)Low power consumption
(6)Fast response time and very low temperature coefficient