HTU21D

HTU21D

Manufacturer:: TE Connectivity Passive Product

TE HTU21D Digital Humidity & Temperature Sensor

Specifications

Product Introduction

The HTU21D(F) is a digital humidity sensor with temperature output 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. 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). 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.

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
  • DFN type package
  • Relative Humidity and Temperature Digital Output, I²C interface
  • Fully calibrated
  • Lead free sensor, reflow solderable
  • Low power consumption
  • Fast response time

Applications

  • Home Appliance
  • Medical
  • Printers
  • Humidifier

Specifications Table

Parameter Value
Storage Temperature -40 to 125 °C
Supply Voltage (Peak) 3.8V Vdc
Humidity Operating Range 0 to 100 %RH
Temperature Operating Range -40 to +125 °C
VDD to GND -0.3 to 3.6V V
Digital I/O pins (DATA/SCK) to VDD -0.3 to VDD+0.3 V
Input current on any pin -10 to +10 mA
Voltage Supply 1.5 to 3.6 V
Current consumption Sleep mode 0.02 to 0.14 µA
Current consumption Measuring 300 to 500 µA
Power Dissipation Sleep mode 0.06 to 0.5 µW
Power Dissipation Average 8bit 2.7 µW
Communication digital 2-wire interface, I²C protocol
Heater 5.5mW/ΔT=+0.5-1.5°C
Storage -40°C/125°C
Resolution 12 bits 0.04 %RH
Resolution 8 bits 0.7 %RH
Humidity Operating Range 0 to 100 %RH
Relative Humidity Accuracy typ @25°C (20%RH to 80%RH) ±2 %RH
Temperature coefficient (from 0°C to 80°C) -0.15 %RH/°C
Humidity Hysteresis ±1 %RH
Measuring Time 12 bits 14 to 16 ms
Measuring Time 11 bits 7 to 8 ms
Measuring Time 10 bits 4 to 5 ms
Measuring Time 8 bits 2 to 3 ms
PSRR ±10 LSB
Recovery time after 150 hours of condensation 10 s
Long term drift 0.5 %RH/yr
Response Time (at 63% of signal) from 33 to 75%RH 5 to 10 s
Resolution 14 bit 0.01 °C
Resolution 12 bit 0.04 °C
Temperature Operating Range -40 to +125 °C
Temperature Accuracy typ @25°C ±0.3 °C
Measuring time 14 bit 44 to 50 ms
Measuring time 13 bit 22 to 25 ms
Measuring time 12 bit 11 to 13 ms
Measuring time 11 bit 6 to 7 ms
PSSR ±25 LSB
Long term drift 0.04 °C/yr
Response Time (at 63% of signal) from 15°C to 45°C 10 s

To learn more, please download the PDF.

Datasheet: