HTU21D Datasheet, PDF (1/20 Pages) TE Connectivity Ltd – Digital Relative Humidity sensor with Temperature output

HTU21D(F) RH/T SENSOR IC
Digital Relative Humidity sensor with
Temperature output
SPECIFICATIONS
 DFN type package
 Relative Humidity and Temperature Digital Output, I²C
interface
 Fully calibrated
 Lead free sensor, reflow solderable
 Low power consumption
 Fast response time
FEATURES
 Full interchangeability with no
calibration required in standard
conditions
 Instantaneous desaturation after
long periods in saturation phase
 Compatible with automatized
assembly processes, including Pb
free and reflow processes
 Individual marking for compliance to
stringent traceability requirements
APPLICATIONS
 Home Appliance
 Medical
 Printers
 Humidifier

The HTU21D(F) is a new digital humidity sensor with
temperature output by MEAS. Setting new standards in terms of
size and intelligence, it is embedded in a reflow solderable Dual
Flat No leads (DFN) package with a small 3 x 3 x 0.9 mm
footprint. This sensor provides calibrated, linearized signals in
digital, I²C format.
HTU21D(F) digital humidity 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
for humidity and temperature digital outputs. These low power
sensors are 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. Low battery can be detected and a checksum
improves communication reliability. The resolution of these digital
humidity sensors can be changed by command (8/12bit up to
12/14bit for RH/T).
With MEAS’ improvements and miniaturization of this sensor, the
performance-to-price ratio has been improved – and eventually,
any device should benefit from its cutting edge energy saving
operation mode.
Optional PTFE filter/membrane (F) protects HTU21D digital
humidity sensors against dust and water immersion, as well as
against contamination by particles. PTFE filter/membranes
preserve a high response time. The white PTFE filter/membrane
is directly stuck on the sensor housing. This membrane is
allowing an IP67 compliant protection.
SENSOR SOLUTIONS /// HPC199_6 HTU21D(F)
9/2015
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