SEN SO R SOL U TIO N S
Humidity and Temperature Sensors
www.silabs.com/humidity-sensor
FEATURES
• Precision Relative Humidity Sensor:
• Si7013/21: ± 3% RH (maximum) @ 0–80% RH
• Si7020: ± 4% RH (maximum) @ 0–80% RH
• Temperature Sensor:
• ±0.4 °C accuracy (maximum) @ -10 to +85 °C
• Auxiliary 2nd zone sensor input (Si7013)
• 0 to 100% RH operating range
• Up to -40 to +125 °C operating range
• Wide operating voltage range (1.9 to 3.6 V)
• Low Power Consumption:
• 1.9 µW average power at 3.3 V and 1 sample
per second
The simpler, greener way to measure relative humidity
DIGITAL I
2
C HUMIDITY AND TEMPERATURE SENSORS
The Si701x/2x devices are Silicon Labs’ 2nd generation family of relative humidity and
temperature sensors. All members of this device family combine fully factory-calibrated
humidity and temperature sensor elements with an analog to digital converter, signal
processing and an I
2
C host interface. Patented use of industry-standard low-K polymer
dielectrics provides excellent accuracy and long term stability, along with low drift and low
hysteresis. The innovative CMOS design also offers the lowest power consumption in the
industry for a relative humidity and temperature sensor.
VSNS
Humidity
Sensor
Temperature
Sensor
VINP
VINN
Analog
Input
GND
Vdd
Vdd
• I
2
C host interface
• Integrated on-chip heater
• 3 mm x 3 mm DFN package
• Excellent long term stability
• Factory calibrated
• Optional factory-installed filter/cover
• Lifetime protection during reflow and
in operation
• Protects against contamination from dust, dirt,
household chemicals and other liquids
Si7013
• AEC-Q100 automotive qualified
1.25 V
Ref
Calibration
Memory
Control Logic
ADC
SDA
APPLICATIONS
• Industrial HVAC/R
• Thermostats/humidistats
• Respiratory therapy
• White goods
• Micro-environments/data centers
• Automotive climate control and de-fogging
• Asset and goods tracking
I
2
C Interface
SDA
SCL
Si7020/21
Calibration
Memory
Control Logic
Humidity
Sensor
1.25 V
Ref
ADC
Temperature
Sensor
LOWEST POWER INTEGRATED RH SENSOR
I
2
C Interface
GND
SDA
SCL
MORE INFORMATION AND DOCUMENTATION DOWNLOADS AT:
www.silabs.com/humidity-sensor
Engineering for a mixed-signal world.
SEN SOR SO LU TI ON S
Humidity and Temperature Sensors
Si70xx Development Tools
www.silabs.com/humidity-sensor
The Si70xx is supported by a suite of hardware and software development tools that facilitate testing/characterization, prototyping and software
development.
The
Si7013USB-DONGLE
Evaluation Kit comes with everything developers need to demonstrate and evaluate the Si7013. The board plugs into
a PC via a USB socket. It has a connector for adding the Si7013/20/21-EB Daughter Cards.
The
Si7013, Si7020 and Si7021-EB
(included with the Si7013USB-DONGLE) are three small daughter cards that permit evaluation of the Si70xx
at the end of a flex cable. They plug right in to the USB-DONGLE if the user wants to put a sensor in a temperature/humidity chamber or a
product prototype.
The
Si7013EVB-UDP
is a small daughter card that permits evaluation of the Si7013 in conjunction with certain Unified Development Platform
(UDP) components such as the C8051F960 8-bit and the SiM3L1xx LCD 32-bit Ultra-Low Power Microcontroller Development Kits. It plugs
directly into UDP MCU cards for fast prototyping and software development. In addition to an on-board Si7013, there is a connector for adding
an Si7013/20/21-EB via its flex cable, allowing the user to place the Si7013 in a temperature/humidity chamber or a product prototype.
The
Si7005EVB-UDP-F960
Development Kit and
Si7013EVB-UDP-M3L1
Development Kit combines the 8-bit or 32-bit Ultra-Low Power
Microcontroller Development Kits and the Si7013EVB-UDP daughter card with data logger demonstration code. It is a complete package
designed to support hardware and software development using the Si7013 and Silicon Lab’s ultra-low power MCUs. It ships with example
software that implements a portable, battery-powered data logger/asset tracker.
Si7013
USB DONGLE
Si7013/C8051F960 OR SiM3L1xx
UDP EVALUATION KIT
Si7013 UDP
DAUGHTER CARD
Si7013/20/21-EB
DAUGHTER CARDS
Digital I
2
C Relative Humidity and Temperature Sensors
PART NUMBER
DESCRIPTION
MAX ACCURACY
TEMP
.
RH
TEMP
.
RANGE
FILTER
COVER
PACKAGE
FORMAT
PACKAGE
Si7013-A10-GM
Si7013-A10-GM1R
Si7013-A10-IM
Si7013-A10-IM1R
Si7020-A10-GM
Si7020-A10-GM1R
Si7020-A10-IM
Si7020-A10-IM1R
Si7021-A10-GM
Si7021-A10-GM1R
Si7021-A10-IM
Si7021-A10-IM1R
2
2
2
2
2
Digital I
2
C RH and 2-zone temperature sensor IC
Digital I C RH and 2-zone temperature sensor IC with pre-installed protective cover
Digital I C RH and 2-zone temperature sensor IC
Digital I C RH and 2-zone temperature sensor IC with pre-installed protective cover
Digital I
2
C RH and temperature sensor IC
Digital I C RH and temperature sensor IC with pre-installed protective cover
Digital I C RH and temperature sensor IC
Digital I C RH and temperature sensor IC with pre-installed protective cover
Digital I
2
C RH and temperature sensor IC
Digital I
2
C RH and temperature sensor IC with pre-installed protective cover
Digital I C RH and temperature sensor IC
Digital I C RH and temperature sensor IC with pre-installed protective cover
2
2
2
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±0.4 °C
±3%
±3%
±3%
±3%
±4%
±4%
±4%
±4%
±3%
±3%
±3%
±3%
–40 to 85 ºC
–40 to 85 ºC
–40 to 125 ºC
–40 to 125 ºC
–40 to 85 ºC
–40 to 85 ºC
–40 to 125 ºC
–40 to 125 ºC
–40 to 85 ºC
–40 to 85 ºC
–40 to 125 ºC
–40 to 125 ºC
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Laboratories Inc. ARM and Cortex-M3 are trademarks or registered trademarks of ARM Holdings. All other product or service names
are the property of their respective owners. For the most up to date information please see your sales representative or visit our
website at www.silabs.com. WEB December 2013, Rev B SOL
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