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HTU21D 데이터시트 PDF




Measurement에서 제조한 전자 부품 HTU21D은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 HTU21D 자료 제공

부품번호 HTU21D 기능
기능 Digital Relative Humidity sensor
제조업체 Measurement
로고 Measurement 로고


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HTU21D 데이터시트, 핀배열, 회로
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
Free Datasheet http://www.datasheet-pdf.com/




HTU21D pdf, 반도체, 판매, 대치품
HTU21D(F) Sensor
Digital Relative Humidity sensor with Temperature output
GRAPH 1 : RELATIVE HUMIDITY ERROR BUDGET CONDITIONS AT 25°C
10
9
8
7
6
5
4
3
2
1
0
0
Maximal Tolerance
Typical Tolerance
10 20 30 40 50 60 70 80 90 100
Relative Humidity (%RH)
HTU21D(F) sensors are specified for optimum accuracy measurements within 5 to 95%RH.
Operation out of this range (< 5% or > 95% RH, including condensation) is however possible.
TEMPERATURE COEFFICIENT COMPENSATION EQUATION
Using the following temperature coefficient compensation equation will guarantee Relative Humidity accuracy given p.3, from
0°C to 80°C:
RH compensatedT RH actualT (25 Tactual) CoeffTemp
RHactualT
Tactual
CoeffTemp
Ambient humidity in %RH, computed from HTU21D(F) sensor
Humidity cell temperature in °C, computed from HTU21D(F) sensor
Temperature coefficient of the HTU21D(F) in %RH/°C
HPC199_3 HTU21D(F) Sensor Datasheet
www.meas-spec.com
4/21
October 2013
Free Datasheet http://www.datasheet-pdf.com/

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HTU21D 전자부품, 판매, 대치품
HTU21D(F) Sensor
Digital Relative Humidity sensor with Temperature output
Storage Conditions and Handling Instructions
It is recommended to store HTU21D(F) sensor in its original packaging at following conditions: Temperature
shall be in the range of -40°C 125°C.
Temperature Effects
Relative humidity reading strongly depends on temperature. Therefore, it is
essential to keep humidity sensors at the same temperature as the air of which the
relative humidity is to be measured.
In case of testing or qualification the reference sensor and test sensor must show
equal temperature to allow for comparing humidity readings.
The HTU21D(F) sensor should be mounted in a way that prevents heat transfer
from electronic sensor or that keeps it as low as possible. Advice can be ventilation,
reduction of copper layers between the HTU21D(F) sensor and the rest of the PCB
or milling a slit into the PCB around the sensor (1mm minimum width).
Example of HTU21D(F) sensor mounting
with slits mills to minimize heat transfer
Materials Used for Sealing / Mounting
For sealing and gluing (use sparingly), use high filled epoxy for electronic packaging and silicone. For any
specific material please request to [email protected].
Window must remain uncovered.
HPC199_3 HTU21D(F) Sensor Datasheet
www.meas-spec.com
7/21
October 2013
Free Datasheet http://www.datasheet-pdf.com/

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