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HDC3020 Datasheet Preview

HDC3020 Datasheet

Digital Humidity and Temperature Sensor

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HDC3020
SNAS778 – JUNE 2021
HDC302x High-Accuracy, Low-Power, Digital Humidity and Temperature Sensor With
Ultra-Low Drift
1 Features
• Relative humidity (RH) sensor:
– Operating range: 0% to 100%
– Accuracy: ±1.5% typical
– Drift Correction: reduces offset to return device
to within accuracy specification
– Long-term drift: 0.21%RH/yr
– Condensation protection with integrated heater
• Temperature sensor:
– Operating range: -40°C to 125°C
– Accuracy: ±0.1°C typical
• NIST traceability: Relative humidity & temperature
• Low power: average current 0.7 µA
• I2C interface compatibility up to 1-Mhz speeds
– Four selectable I2C addresses
– Command/data protection through CRC
checksum
• Supply voltage: 1.62 V to 5.50 V
• Available auto measurement mode
• Programmable interrupts
• Programmable measurement calibration
• Factory-installed polyimide tape assembly cover
• Factory-installed IP67 rated environmental cover
2 Applications
• Washer & dryer
• Refrigerator & freezer
• Industrial transport
• Cold Chain asset tracking & data logger
• IoT environmental sensors
• Air quality and gas detection
• Humidifier/dehumidifier
• Thermostat
• CPAP and ventilator
• Water leak detector
• IP Camera
RH Sensor
T Sensor
HDC3
Calibration
ADC
Linearization
3.30 V
VDD
VDD
SCL
SDA
ALERT
I2C
ADDR
ADDR1
I2C
Controller
GPIO
µC
RESET
GND
GND
Typical Application
3 Description
The HDC302x is an integrated capacitive based
relative humidity (RH) and temperature sensor, which
provides high accuracy measurements over a wide
supply range (1.62 V – 5.5 V), along with ultra-low
power consumption in a compact 2.5-mm × 2.5-mm
package. Both the temperature and humidity sensors
are 100% tested and trimmed on a production setup
that is NIST traceable and verified with equipment that
is calibrated to ISO/IEC 17025 standards.
Drift Correction reduces RH sensor offset due to
aging, exposure to extreme operating conditions, and
contaminants to return device to within accuracy
specifications. For battery IoT applications, auto
measurement mode and ALERT feature enable low
system power by maximizing MCU sleep time. There
are four different I2C addresses that support speeds
up to 1 MHz. A heating element is available to
dissipate condensation and moisture.
The HDC3020 comes in an open cavity package
without a protective cover. Two device variants have
a cover option to protect the open cavity RH sensor:
HDC3021 and HDC3022. HDC3021 has removable
protective tape to allow conformal coatings and
PCB wash. HDC3022 has a permanent IP67 filter
membrane cover to protect against dust and water.
Device Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
HDC3020
HDC3021(2)
HDC3022(2)
WSON (8)
2.50 mm × 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) Preview only.
Typical RH Accuracy vs. RH Setpoint (TA = 25°C)
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change
without notice.




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HDC3020 Datasheet Preview

HDC3020 Datasheet

Digital Humidity and Temperature Sensor

No Preview Available !

HDC3020
SNAS778 – JUNE 2021
www.ti.com
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings ....................................... 4
6.2 ESD Ratings .............................................................. 4
6.3 Recommended Operating Conditions ........................4
6.4 Thermal Information ...................................................4
6.5 Electrical Characteristics ............................................5
6.6 Switching Characteristics ...........................................7
6.7 Timing Diagram...........................................................7
6.8 Typical Characteristics................................................ 8
7 Detailed Description........................................................9
7.1 Overview..................................................................... 9
7.2 Functional Block Diagram........................................... 9
7.3 Feature Description.....................................................9
7.4 Device Functional Modes..........................................12
7.5 Programming............................................................ 12
8 Application and Implementation.................................. 29
8.1 Application Information............................................. 29
8.2 Typical Application.................................................... 29
9 Power Supply Recommendations................................32
10 Layout...........................................................................32
10.1 Layout Guidelines................................................... 32
10.2 Layout Example...................................................... 33
10.3 Storage and PCB Assembly................................... 33
11 Device and Documentation Support..........................35
11.1 Documentation Support.......................................... 35
11.2 Receiving Notification of Documentation Updates.. 35
11.3 Support Resources................................................. 35
11.4 Trademarks............................................................. 35
11.5 Electrostatic Discharge Caution.............................. 35
11.6 Glossary.................................................................. 35
12 Mechanical, Packaging, and Orderable
Information.................................................................... 35
12.1 Package Option Addendum.................................... 45
12.2 Tape and Reel Information......................................47
4 Revision History
DATE
June 2021
VERSION
*
NOTES
Initial release.
2
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Product Folder Links: HDC3020
Copyright © 2021 Texas Instruments Incorporated


Part Number HDC3020
Description Digital Humidity and Temperature Sensor
Maker etcTI
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