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SI7021-A10-IM1

Description
湿度温度传感器 0 ~ 100% 相对湿度 I²C ±2% RH 18 s 表面贴装型
CategoryThe sensor    Humidity sensor   
File Size579KB,33 Pages
ManufacturerSilicon Labs
Websitehttps://www.silabs.com
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SI7021-A10-IM1 Overview

湿度温度传感器 0 ~ 100% 相对湿度 I²C ±2% RH 18 s 表面贴装型

SI7021-A10-IM1 Parametric

Parameter NameAttribute value
category
MakerSilicon Labs
series-
Packagebring
sensor typehumidity, temperature
Humidity range0 ~ 100% relative humidity
Output typeI²C
output12b
Accuracy±2% RH
Sensitivity-
Voltage - Power supply1.9V ~ 3.6V
Installation typesurface mount type
Operating temperature-40°C ~ 125°C
Package/casing6-WDFN Exposed Pad
Supplier device packaging6-DFN(3x3)
Response time18 s
Si 7 0 2 1 - A1 0
I
2
C H
UMIDITY A N D
T
EMPERATURE
S
ENSOR
Features
Precision Relative Humidity Sensor

± 3% RH (max), 0–80% RH
High Accuracy Temperature Sensor

±0.4 °C (max), –10 to 85 °C
0 to 100% RH operating range
Up to –40 to +125 °C operating
range
Wide operating voltage
(1.9 to 3.6 V)
Low Power Consumption

150 µA active current

60 nA standby current
Factory-calibrated
I
2
C Interface
Integrated on-chip heater
3x3 mm DFN Package
Excellent long term stability
Optional factory-installed cover

Low-profile

Protection during reflow

Excludes liquids and particulates
Si7021
Ordering Information:
See page 27.
Pin Assignments
Top View
SDA
GND
DNC
1
2
3
6
5
4
SCL
VDD
DNC
Applications
HVAC/R
Thermostats/humidistats
Respiratory therapy
White goods
Indoor weather stations
Micro-environments/data centers
Automotive climate control and
defogging
Asset and goods tracking
Mobile phones and tablets
Description
The Si7021 I
2
C 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 I
2
C 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.
The humidity and temperature sensors are 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 Si7021 is available in a 3x3 mm DFN package and is reflow solderable. It can
be used as a hardware- and software-compatible drop-in upgrade for existing RH/
temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing
over a wider range and lower power consumption. The optional factory-installed
cover offers a low profile, 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 Si7021 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.
Patent Protected. Patents pending
Rev. 1.1 6/15
Copyright © 2015 by Silicon Laboratories
Si7021-A10
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