HDC2080 Low-Power Humidity and Temperature Digital Sensor …

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HDC2080 Low-Power Humidity and Temperature Digital Sensor

HDC2080
SNAS678C – MAY 2018 – REVISED JULY 2021

1 Features

3 Description

• Relative humidity range: 0% to 100%
• Humidity accuracy: ±2% (typical), ±3% (maximum)
• Temperature accuracy: ±0.2°C (typical), ±0.4°C

• Sleep mode current: 50 nA (typical), 100 nA

(maximum)

(maximum )

• Average supply current (1 measurement/second)

– 300 nA: RH% only (11 bit)
– 550 nA: RH% (11 bit) + temperature (11 bit)

• Temperature range:

– Operating: –40°C to 85°C
– Functional: –40°C to 125°C

• Supply voltage range: 1.62 V to 3.6 V
• Available auto measurement mode
•

I2C interface compatibility

2 Applications

• Smart thermostats
• Smart home assistants
• Washer/dryers
• HVAC systems
Inkjet printers
•

Typical Application

is an

integrated humidity
The HDC2080 device
and temperature sensor that provides high accuracy
measurements with very low power consumption in
a small DFN package. The capacitive-based sensor
includes new integrated digital features and a heating
element to dissipate condensation and moisture.
The HDC2080 digital features include programmable
interrupt thresholds to provide alerts and system
to
wake-ups without
be continuously monitoring the system. Combined
with programmable sampling intervals, a low power
consumption, and a support for a 1.8-V supply
for battery-
voltage,
operated systems.

requiring a microcontroller

the HDC2080

is designed

for a wide

The HDC2080 provides high accuracy measurement
capability
range of environmental
monitoring and Internet of Things (IoT) applications
such as smart
thermostats and smart home
assistants. For designs where printed-circuit board
(PCB) area is critical, a smaller CSP package option
is available thru the HDC2010 with complete software
compatibility with the HDC2080.

For applications with strict power-budget restrictions,
Auto Measurement Mode enables the HDC2080
to automatically initiate temperature and humidity
measurements. This feature allows users to configure
a microcontroller into deep sleep mode because
the HDC2080 is no longer dependent upon the
microcontroller to initiate a measurement.

PART NUMBER

BODY SIZE (NOM)

Device Information(1)
PACKAGE

HDC2080

WSON (6)

3.00 mm × 3.00 mm

(1)

For all available packages, see the orderable addendum at
the end of the data sheet.

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. PRODUCTION DATA.

RH Accuracy (TA = 30°C)

RHSensorTemperatureSensorRegisters+LogicCalibrationI2CADCADCSCLSDADRDY/INTADDRHDC2080VDDMCUVDDGPIOI2CMasterGNDGND1.80VRH (%RH)Accuracy (r%RH)0102030405060708090100012345678910Typical HDC2080
SNAS678C – MAY 2018 – REVISED JULY 2021

www.ti.com

Table of Contents

1 Features………………………………………………………………….1
2 Applications…………………………………………………………… 1
3 Description……………………………………………………………..1
4 Revision History…………………………………………………….. 2
5 Description (continued)………………………………………….. 4
6 Pin Configuration and Functions……………………………..4
7 Specifications………………………………………………………… 5
7.1 Absolute Maximum Ratings ………………………………… 5
7.2 ESD Ratings …………………………………………………….. 5
7.3 Recommended Operating Conditions ……………………5
7.4 Thermal Information ……………………………………………5
7.5 Electrical Characteristics ……………………………………..6
7.6 Switching Characteristics …………………………………….7
7.7 Timing Diagram…………………………………………………..7
7.8 Typical Characteristics………………………………………… 8
8 Detailed Description………………………………………………..9
8.1 Overview…………………………………………………………… 9
8.2 Functional Block Diagram……………………………………. 9
8.3 Feature Description……………………………………………..9

8.4 Device Functional Modes……………………………………16
8.5 Programming…………………………………………………… 16
8.6 Register Maps…………………………………………………..17
9 Application and Implementation …………………………… 30
9.1 Application Information……………………………………… 30
9.2 Typical Application……………………………………………. 30
10 Power Supply Recommendations…………………………32
11 Layout………………………………………………………………… 32
11.1 Layout Guidelines…………………………………………… 32
11.2 Layout Example……………………………………………… 34
12 Device and Documentation Support……………………..35
12.1 Documentation Support…………………………………… 35
12.2 Receiving Notification of Documentation Updates..35
12.3 Support Resources…………………………………………. 35
12.4 Trademarks……………………………………………………. 35
12.5 Electrostatic Discharge Caution…………………………35
12.6 Glossary…………………………………………………………35

13 Mechanical, Packaging, and Orderable

Information………………………………………………………….. 35

4 Revision History

Changes from Revision B (May 2019) to Revision C (July 2021)
Page
• Removed GND pin absolute maximum rating………………………………………………………………………………………. 5
• Added DRDY/INT pin absolute maximum rating…………………………………………………………………………………… 5
• Added information from multiple table footnotes to Recommended Operating Conditions table………………….. 5
• Changed temperature accuracy maximum for 5℃ < TA < 60℃.........................................................................6 • Added TEMPPSRR parameter..............................................................................................................................6 • Changed reference material for Storage and Handling ..................................................................................... 9 • Added content to the Heater section................................................................................................................ 10 • Added 0.5 to make Equation 1 –40.5 match more closely to the silicon and added PSSR equation...............18 • Added 0.5 to make Equation 4 –40.5 match more closely to the silicon and added PSSR equation...............21 • Added 0.5 to make Equation 7 –40.5 match more closely to the silicon and added PSSR equation ..............25 • Added 0.5 to make Equation 9 –40.5 match more closely to the silicon and added PSSR equation...............25 • Changed reference material in the Storage and Handling section................................................................... 32 • Added Typical Relative Humidity Accuracy Range Limits graphic....................................................................32 Changes from Revision A (October 2018) to Revision B (May 2019) Page • Added the pin type for DRDY/INT pin ................................................................................................................4 • Changed description of behavior of TH_STATUS bit when INT_MODE is set to 1.......................................... 12 • Changed description of behavior of TH_STATUS bit when INT_MODE is set to 0 ......................................... 12 • Changed description of behavior of TL_STATUS bit when INT_MODE is set to 1...........................................13 • Changed description of behavior of TL_STATUS bit when INT_MODE is set to 0 ..........................................13 • Changed description of behavior of HH_STATUS bit when INT_MODE is set to 1..........................................14 • Changed description of behavior of HH_STATUS bit when INT_MODE is set to 0..........................................14 • Changed description of behavior of HL_STATUS bit when INT_MODE is set to 1.......................................... 15 • Changed description of behavior of HL_STATUS bit when INT_MODE is set to 0 ......................................... 15 • Changed the units for Humidity threshold low from: °C to: %RH......................................................................26 • Changed the temperature resolution decoding from: 8 bit to: 9 bit ..................................................................28 • Changed the humidity resolution decoding from: 8 bit to: 9 bit ........................................................................28 • Changed the measurement configuration "10" bit encoding from: Humidity Only to: NA for field MEAS_CONF[1:0] ........................................................................................................................................... 28 2 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: HDC2080 www.ti.com HDC2080 SNAS678C – MAY 2018 – REVISED JULY 2021 Page Changes from Revision * (May 2018) to Revision A (October 2018) • Changed header cell in the Read Single Byte table from: Slave address (R) to: Slave address (W)...............16 • Changed header cell in the Read Multi Byte table from: Slave address (R) to: Slave address (W)................. 16 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 3 Product Folder Links: HDC2080 HDC2080 SNAS678C – MAY 2018 – REVISED JULY 2021 5 Description (continued) www.ti.com Programable temperature and humidity thresholds in the HDC2080 allow the device to send a hardware interrupt to wake up the microcontroller when necessary. In addition, the power consumption of the HDC2080 is significantly reduced, which helps to minimize self-heating and improve measurement accuracy. The HDC2080 is factory-calibrated to 0.2°C temperature accuracy and 2% relative humidity accuracy. 6 Pin Configuration and Functions PIN NO. NAME SDA GND ADDR DRDY/INT VDD SCL 1 2 3 4 5 6 I/O I/O G I O P I Figure 6-1. DMB Package 6-Pin PWSON Top View Table 6-1. Pin Functions DESCRIPTION Serial data line for I2C, open-drain; requires a pullup resistor to VDD Ground Address select pin – leave unconnected or hardwired to VDD or GND. Unconnected slave address: 1000000 GND: slave address: 1000000 VDD: slave address: 1000001 Data ready/Interrupt. Push-pull output Positive Supply Voltage Serial clock line for I2C, open-drain; requires a pullup resistor to VDD 4 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: HDC2080 Top View1SDA2GNDADDR3DRDY/INT4VDD5SCL6RHSENSOR www.ti.com VDD ADDR SCL SDA Tstg (1) 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) Applied Voltage on VDD pin Applied Voltage on ADDR pin Applied Voltage on SCL pin Applied Voltage on SDA pin DRDY/INT Applied Voltage on DRDY/INT PIN Storage temperature HDC2080 SNAS678C – MAY 2018 – REVISED JULY 2021 MIN –0.3 –0.3 –0.3 –0.3 -0.3 –65 MAX UNIT 3.9 3.9 3.9 3.9 V V V V V VDD + 0.3 150 °C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 7.2 ESD Ratings V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) Charged device model (CDM), per JEDEC specification JESD22-C101(2) (1) (2) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 7.3 Recommended Operating Conditions VDD TTEMP TRH THEATER RHOR PARAMETER Supply voltage Temperature Sensor - Operating free-air temperature Relative Humidity Sensor - Operating free-air temperature(1) Integrated Heater - Operating free-air temperature Relative Humidity Sensor (Non-condensing)(1) (1) Prolonged operation outside the recommended temperature operating conditions and/or at >80%RH with temperature in the higher
recommended operating range can result in a shift of sensor reading, with slow recovery time. See High Temperature and Humidity
Exposure for more details.

7.4 Thermal Information

THERMAL METRIC(1)

RθJA

RθJC(top)

RθJB

ΨJT

ΨJB

Junction-to-ambient thermal resistance

Junction-to-case (top) thermal resistance

Junction-to-board thermal resistance

Junction-to-top characterization parameter

Junction-to-board characterization parameter

RθJC(bot)

Junction-to-case (bottom) thermal resistance

HDC2080

WSON (DMB)

6 PINS

56.4

73.6

24.0

3.8

24.0

13.0

UNIT

°C/W

°C/W

°C/W

°C/W

°C/W

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.

VALUE

UNIT

±2000

±500

V

MIN

1.62

–40

–20

–40

0

MAX UNIT

3.6

125

70

85

V

°C

°C

°C

100 %RH

Copyright © 2021 Texas Instruments Incorporated

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5

Product Folder Links: HDC2080