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What is HTU21DF?

This electronic component, produced by the manufacturer "TE", performs the same function as "Digital Relative Humidity sensor".


HTU21DF Datasheet PDF - TE

Part Number HTU21DF
Description Digital Relative Humidity sensor
Manufacturers TE 
Logo TE Logo 


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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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HTU21DF equivalent
HTU21D(F) RH/T SENSOR IC
Digital Relative Humidity sensor with Temperature output
(1) Typical values are recommended for calculating energy consumption while maximum values shall be applied for calculating
waiting times in communication.
(2) At 1m/s air flow
GRAPH 2 : TEMPERATURE ERROR BUDGET
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-40 -20 0
Maximal Tolerance
Typical Tolerance
20 40 60 80 100 120
Temperature (°C)
USER GUIDE HTU21D(F)
APPLICATION INFORMATION
Soldering instructions: Lead free reflow soldering recommended process
For soldering HTU21D(F) sensor standard reflow soldering ovens may be used.
HTU21D(F) sensor as a humidity sensitive component (as classified by IPC/JEDEC J-STD-020 or equivalent
documented procedure with peak temperature at 260°C during up to 30 seconds for Pb-free assembly in
IR/convection reflow ovens) must be handled in a manner consistent with IPC/JEDEC J-STD-033 or an equivalent
documented procedure. IPC-1601 provides humidity control, handling and packing of PCBs.
The HTU21D(F) s ensor is qualified to withstand one lead free reflow soldering recommended process profile
below according to JEDEC standard.
SENSOR SOLUTIONS /// HPC199_6 HTU21D(F)
9/2015
Page 5


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for HTU21DF electronic component.


Information Total 20 Pages
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