SI7022-A20-YM1R datasheet, PDF

Datasheet> All Categories > The sensor> Environmental sensors> Humidity sensor installed on board> SI7022-A20-YM1R

SI7022-A20-YM1R: DescriptionBoard mount humidity sensorDigital RH (4% max) & temperature sensor, automotive grade, PWM output with cover/filter; CategoryThe sensor Environmental sensors Humidity sensor installed on board; File Size1MB，26 Pages; ManufacturerSilicon Labs; Websitehttps://www.silabs.com; Environmental Compliance

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SI7022-A20-YM1R Overview

Board mount humidity sensorDigital RH (4% max) & temperature sensor, automotive grade, PWM output with cover/filter

SI7022-A20-YM1R Parametric

Parameter Name	Attribute value
Maker	Silicon Labs
Product Category	Board mounted humidity sensor
Encapsulation	Reel
Factory packaging quantity	2500

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Si 7 0 2 2 - A2 0

U MI D I T Y

/ T

EMPERATURE

ENSOR WITH

P W M O

UTPUT

Features



Precision Relative Humidity Sensor



± 4% RH (max), 0–80% RH

High Accuracy Temperature Sensor



±0.4 °C (max), –10 to 85 °C

0 to 100% RH operating range

–40 to +125 °C operating range

Wide operating voltage

(1.9 to 3.6 V)

Low Power Consumption



Factory-calibrated

PWM Output

3x3 mm DFN Package

Excellent long term stability

Optional factory-installed cover



Low-profile



Protection during reflow



Excludes liquids and particulates

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



Ordering Information:

See page 18.

Pin Assignments

Description

The Si7022 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 a PWM output. The PWM

output may be filtered to produce an analog voltage output. 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 Si7022 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 Si7022 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.

Top View

PWM1

GND

DNC

SELECT

VDD

PWM2

Patent Protected. Patents pending

Rev. 1.3 8/16

Si7022-A20

Si7022-A20

ABLE O F

ONTENTS

Section

Page

1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

2. Typical Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1. Relative Humidity Sensor Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2. Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3. Prolonged Exposure to High Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.4. PCB Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.5. Protecting the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.6. Bake/Hydrate Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7. Long Term Drift/Aging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5. PWM Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

6. Pin Descriptions: Si7022 (Top View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8.1. Package Outline: 3x3 6-pin DFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8.2. Package Outline: 3x3 6-pin DFN with Protective Cover . . . . . . . . . . . . . . . . . . . . . . 20

9. PCB Land Pattern and Solder Mask Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

10. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

10.1. Si7022 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

11. Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Rev. 1.3

SI7022-A20-YM1R Related Products

	SI7022-A20-YM1R	SI7022-A20-YM1	SI7022-A20-YM0
Description	Board mount humidity sensorDigital RH (4% max) & temperature sensor, automotive grade, PWM output with cover/filter	Board mount humidity sensorDigital RH (4% max) & temperature sensor, automotive grade, PWM output with cover/filter	Board mount humidity sensorDigital RH (4% max) & temperature sensor, automotive grade, PWM output
Maker	Silicon Labs	Silicon Labs	Silicon Labs
Product Category	Board mounted humidity sensor	Board mounted humidity sensor	Board mounted humidity sensor
Encapsulation	Reel	Cut Tape	Tube
Factory packaging quantity	2500	100	100

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