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HTU20P

Digital Relative Humidity sensor with Temperature output

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HTU21D(F) Sensor

Digital Relative Humidity sensor with Temperature output

 DFN type package

 Relative Humidity and Temperature Digital Output, I²C

interface

 Fully calibrated

 Lead free sensor, reflow solderable

 Low power consumption

 Fast response time

DESCRIPTION

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.

FEATURES

APPLICATIONS

 Full interchangeability with no calibration required  Automotive: defogging, HVAC

in standard conditions

 Home Appliance

 Instantaneous desaturation after long periods in

 Medical

saturation phase

 Printers

 Compatible with automatized assembly processes,  Humidifier

including Pb free and reflow processes

 Individual marking for compliance to stringent

traceability requirements

HPC199_3 HTU21D(F) Sensor Datasheet

www.meas-spec.com

1/21

October 2013

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