SI7015-A20 Datasheet, PDF (1/39 Pages) Silicon Laboratories – DIGITAL IC HUMIDITY AND TEMPERATURE SENSOR

Si7015-A20
DIGITAL I²C HUMIDITY AND TEMPERATURE SENSOR
Features
 Precision Relative Humidity Sensor  Drop-In Upgrade for Si7005
± 4.5% RH (max), 0–80% RH
 Factory-calibrated
 High-Accuracy Temperature Sensor _{ I}2_{C Interface}
±1 ºC (max), –10 to 85 °C
 0 to 100% RH operating range
 Integrated on-chip heater
 4x4 mm QFN package
 0 to +70 °C operating range (FM)
 Excellent long term stability
 –40 to +85 °C operating range (GM)
 Optional factory-installed
 Low Voltage Operation (1.9 to 3.6 V)
cover
 Low Power Consumption
Low-profile
150 µA active current
Protection during reflow
60 nA standby current
Excludes liquids and
particulates
Applications
 HVAC/R
 Thermostats/humidistats
 Instrumentation
 White goods
 Micro-environments/data centers
 Industrial controls
 Weather stations
 Asset tracking and storage
Description
The Si7015 I²C Humidity and Temperature Sensor is a monolithic CMOS
IC integrating humidity and temperature sensor elements, an analog-to-
digital converter, signal processing, calibration data, and an I²C Interface.
The patented use of industry-standard, low-K polymeric dielectrics for
sensing humidity enables the construction of low-power, monolithic
CMOS Sensor ICs with low drift and hysteresis and excellent long term
stability.
Each unit is factory-calibrated, and the calibration data is stored in the on-
chip non-volatile memory. This ensures that the sensors are fully
interchangeable, with no recalibration or software changes required. The
Si7015 can be used as a drop-in upgrade for the Si7005 with only minor
software changes because the register sets are the same, and the
4x4 mm QFN package is footprint-compatible with that of the Si7005.
The device is compatible with standard SMT assembly processes, such
as reflow. The optional factory-installed cover offers a low profile and
convenient means of protecting the sensor during assembly (e.g., reflow
soldering) and throughout the life of the product, excluding liquids
(hydrophobic/oleophobic) and particulates.
The Si7015 offers an accurate, low-power, factory-calibrated digital
solution ideal for measuring humidity, dew-point, and temperature in
applications ranging from HVAC/R and asset tracking to industrial and
consumer platforms.
Ordering Information
See page 31.
Patent protected; patents pending
Pin Assignments
GND ¹
DNC 2
SCL ³
SDA ⁴
DNC ⁵
DNC ⁶
18 DNC
17 DNC
16 DNC
15 CS
14 DNC
13 DNC
Rev. 1.0 1/15
Copyright © 2015 by Silicon Laboratories
Si7015-A20