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HDC2080 Datasheet Preview

HDC2080 Datasheet

Low-Power Humidity and Temperature Digital Sensor

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HDC2080
SNAS678B – MAY 2018 – REVISED MAY 2019
HDC2080 Low-Power Humidity and Temperature Digital Sensor
1 Features
1 Relative humidity range: 0% to 100%
• Humidity accuracy: ±2% (typical), ±3% (maximum)
• Temperature accuracy: ±0.2°C (typical), ±0.4°C
(maximum)
• Sleep mode current: 50 nA (typical), 100 nA
(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
HDC2080
RH
Sensor
Temperature
Sensor
Typical Application
ADC
ADC
Registers
+
Logic
VDD
SCL
SDA
I2C DRDY/INT
ADDR
1.80V
VDD
I2C
Master
GPIO
MCU
3 Description
The HDC2080 device is an integrated humidity 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
wake-ups without requiring a microcontroller to be
continuously monitoring the system. Combined with
programmable sampling intervals, a low power
consumption, and a support for a 1.8-V supply
voltage, the HDC2080 is designed for battery-
operated systems.
The HDC2080 provides high accuracy measurement
capability for a wide 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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.
Calibration
GND
GND
RH Accuracy (TA = 30°C)
10
Typical
9
8
7
6
5
4
3
2
1
0
0
10
20
30
40
50
60
70
80
90 100
RH (%RH)
1
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.




etcTI

HDC2080 Datasheet Preview

HDC2080 Datasheet

Low-Power Humidity and Temperature Digital Sensor

No Preview Available !

HDC2080
SNAS678B – MAY 2018 – REVISED MAY 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ..................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics........................................... 4
7.6 I2C Interface Electrical Characteristics...................... 5
7.7 I2C Interface Timing Requirements........................... 6
7.8 Timing Diagram......................................................... 6
7.9 Typical Characteristics .............................................. 6
8 Detailed Description .............................................. 8
8.1 Overview ................................................................... 8
8.2 Functional Block Diagram ......................................... 8
8.3 Feature Description................................................... 8
8.4 Device Functional Modes........................................ 15
8.5 Programming .......................................................... 15
8.6 Register Maps ......................................................... 17
9 Application and Implementation ........................ 28
9.1 Application Information............................................ 28
9.2 Typical Application ................................................. 28
10 Power Supply Recommendations ..................... 30
11 Layout................................................................... 30
11.1 Layout Guidelines ................................................. 30
11.2 Layout Example .................................................... 31
12 Device and Documentation Support ................. 32
12.1 Documentation Support ........................................ 32
12.2 Receiving Notification of Documentation Updates 32
12.3 Community Resources.......................................... 32
12.4 Trademarks ........................................................... 32
12.5 Electrostatic Discharge Caution ............................ 32
12.6 Glossary ................................................................ 32
13 Mechanical, Packaging, and Orderable
Information ........................................................... 32
4 Revision History
Changes from Revision A (October 2018) to Revision B
Page
• Added the pin type for DRDY/INT pin ................................................................................................................................... 3
• Changed description of behavior of TH_STATUS bit when INT_MODE is set to 1............................................................. 11
• Changed description of behavior of TH_STATUS bit when INT_MODE is set to 0 ............................................................ 11
• Changed description of behavior of TL_STATUS bit when INT_MODE is set to 1 ............................................................. 12
• Changed description of behavior of TL_STATUS bit when INT_MODE is set to 0 ............................................................ 12
• Changed description of behavior of HH_STATUS bit when INT_MODE is set to 1 ............................................................ 13
• Changed description of behavior of HH_STATUS bit when INT_MODE is set to 0 ............................................................ 13
• Changed description of behavior of HL_STATUS bit when INT_MODE is set to 1 ............................................................. 14
• Changed description of behavior of HL_STATUS bit when INT_MODE is set to 0 ............................................................ 14
• Changed the units for Humidity threshold low from: °C to: %RH......................................................................................... 24
• Changed the temperature resolution decoding from: 8 bit to: 9 bit ..................................................................................... 26
• Changed the humidity resolution decoding from: 8 bit to: 9 bit ........................................................................................... 26
• Changed the measurement configuration "10" bit encoding from: Humidity Only to: NA for field MEAS_CONF[1:0] ........ 26
Changes from Original (May 2018) to Revision A
Page
• 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
2
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Copyright © 2018–2019, Texas Instruments Incorporated



Part Number HDC2080
Description Low-Power Humidity and Temperature Digital Sensor
Maker etcTI
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