SI7015-A20-FM datasheet, PDF - EEWORLD Datasheet

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SI7015-A20-FM: DescriptionSENS HUMI/TEMP 3.6V I2C 4.5% QFN; CategoryThe sensor; File Size1MB，39 Pages; ManufacturerSilicon Laboratories Inc; Environmental Compliance

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SI7015-A20-FM Overview

SENS HUMI/TEMP 3.6V I2C 4.5% QFN

SI7015-A20-FM Parametric

Parameter Name	Attribute value
sensor type	humidity, temperature
Humidity range	0 ~ 100% relative humidity
Output type	I²C
output	12b
Accuracy	±4.5% RH
Response time	18s
Sensitivity	-
Voltage - Power	1.9 V ~ 3.6 V
Installation type	surface mount
Operating temperature	0°C ~ 70°C
Package/casing	24-VFQFN Exposed Pad
Supplier device packaging	24-QFN（4x4）

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Si 7 0 1 5 - A2 0

IGITA L

C H

UMIDITY AND

EMPERATURE

ENSOR

Features



Precision Relative Humidity Sensor



4.5% RH (max), 0–80% RH

ºC (max), –10 to 85 °C

Drop-In Upgrade for Si7005



Factory-calibrated



High-Accuracy Temperature Sensor



±1

0 to 100% RH operating range



0 to +70 °C operating range (FM)



–40 to +85 °C operating range (GM)



Low Voltage Operation (1.9 to 3.6 V)

Low Power Consumption



150

C Interface

Integrated on-chip heater

4x4 mm QFN package

Excellent long term stability

Optional factory-installed

cover



Low-profile



Protection

µA active current



60 nA standby current

Ordering Information

See page 31.

Patent protected; patents pending

Pin Assignments

GND

18 DNC

17 DNC

16 DNC

15 CS

14 DNC

13 DNC

GND

DNC

during reflow



Excludes liquids and

particulates

Applications

HVAC/R



Thermostats/humidistats



Instrumentation



White goods



Micro-environments/data centers



Industrial controls



Weather stations



Asset tracking and storage



GND

DNC

SCL

SDA

DNC

GND

Description

The Si7015 I

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

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.

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.

Rev. 1.2 8/16

DNC

Si7015-A20

Si7015-A20

ABLE O F

ONTENTS

Section

Page

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

2. Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2. Relative Humidity Sensor Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.3. Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.4. Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5. Prolonged Exposure to High Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.6. PCB Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.7. Protecting the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.8. Bake/Hydrate Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.9. Long Term Drift/Aging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5. Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.1. I2C Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2. I2C Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

6. Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

6.1. Register Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7. Pin Descriptions: Si7015 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

8. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9. Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

9.1. 24-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

9.2. 24-Pin QFN with Protective Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

10. PCB Land Pattern and Solder Mask Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

11. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

11.1. Si7015 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

11.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

12. Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Rev. 1.2

SI7015-A20-FM Related Products

	SI7015-A20-FM	SI7015-A20-GMR	SI7015-A20-FM1R	SI7015-A20-GM1R	SI7015-A20-GM	SI7015-A20-FM1	SI7015-A20-FMR
Description	SENS HUMI/TEMP 3.6V I2C 4.5% QFN	SENS HUMID/TMP 3.6V I2C 3% 24QFN	SENS HUMID/TMP 3.6V I2C 3% 24QFN	SENS HUMID/TMP 3.6V I2C 3% 24QFN	SENS HUMI/TEMP 3.6V I2C 4.5% QFN	SENS HUMI/TEMP 3.6V I2C 4.5% QFN	SENS HUMID/TMP 3.6V I2C 3% 24QFN
sensor type	humidity, temperature	humidity, temperature	humidity, temperature	humidity, temperature	humidity, temperature	humidity, temperature	humidity, temperature
Humidity range	0 ~ 100% relative humidity	0 ~ 100% relative humidity	0 ~ 100% relative humidity	0 ~ 100% relative humidity	0 ~ 100% relative humidity	0 ~ 100% relative humidity	0 ~ 100% relative humidity
Output type	I²C	I²C	I²C	I²C	I²C	I²C	I²C
output	12b	12b	12b	12b	12b	12b	12b
Accuracy	±4.5% RH	±4.5% RH	±4.5% RH	±4.5% RH	±4.5% RH	±4.5% RH	±4.5% RH
Response time	18s	18s	18s	18s	18s	18s	18s
Voltage - Power	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V	1.9 V ~ 3.6 V
Installation type	surface mount	surface mount	surface mount	surface mount	surface mount	surface mount	surface mount
Operating temperature	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Package/casing	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad	24-VFQFN Exposed Pad
Supplier device packaging	24-QFN（4x4）	24-QFN（4x4）	24-QFN（4x4）	24-QFN（4x4）	24-QFN（4x4）	24-QFN（4x4）	24-QFN（4x4）

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