ams Datasheet Page 1
[v1-04] 2018-Apr-23 Document Feedback
CCS801
Ultra-Low Power Analog VOC Sensor
for Indoor Air Quality Monitoring
ams micro-hotplate technology provides a unique silicon
platform for the CCS80x range of Metal Oxide (MOX) gas
sensors. These devices enable sensor miniaturization, have
ultra-low power consumption and provide fast response times
due to the ability to heat the micro-hotplate very quickly.The
micro-hotplates are fabricated using a robust silicon dioxide
membrane and include an embedded tungsten heating
element to heat the MOX based sensing material. The MOX
sensing material can be heated up to 500°C to allow the
electrical resistance of the MOX sensor to be monitored to
detect the target gas. By exploiting the fast heater cycling
times, temperature modulation techniques can be used to
reduce the device power consumption and implement
advanced gas sensing methods.
Software libraries containing proprietary algorithms and
example Android applications are available for indoor air
quality monitoring.
Product Overview
CCS801 is an ultra-low power analog sensor for monitoring
indoor air quality including Carbon Monoxide (CO) and a wide
range of Volatile Organic Compounds (VOCs) such as Ethanol.
CCS801 can be used as an equivalent carbon dioxide (eCO2)
sensor to represent eCO2 levels in real world environments,
where the main source of VOCs is from humans.
For CCS801 a supply voltage (VH) is provided to the integrated
micro-heater and the gas concentration can be correlated to
the change in resistance of the MOX sensing layer (Rs).
VH can be operated in constant or pulsed mode to reduce power
consumption. The sensor resistance (RS) is typically determined
using a series load resistor (RL), a reference voltage (VREF), and
by reading an output voltage (VOUT) with an
Analogue-to-Digital Converter (ADC). The reference voltage
(VREF) must only be enabled during the sensor reading.
CCS801 is supported in a compact 2mm x 3mm x 1mm DFN
(Dual Flat No lead) package as standard.
Ordering Information and Content Guide appear at end of
datasheet.
General Description
Page 2 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − General Description
Key Benefits & Features
The benefits and features of CCS801, Ultra-Low Power Analog
VOC Sensor for Indoor Air Quality Monitoring are listed below:
Figure 1:
Added Value of Using CCS801 Sensor
Applications
CCS801 can be used to detect VOCs for indoor air quality
monitoring.
Application Diagram
The recommended configuration of this device is shown below:
Figure 2:
Recommended Sensor Configuration
Benefits Features
•Extend battery life for portable applications •Optimized low-power modes
•Sensitive to target gases •Reduced cross sensitivity
•Fast heating time <15ms •Quick response to target gases
•Suitable for small form factor designs •Compact 2mm x 3mm x 1mm DFN package
RH
VOUT
3
4
1
2
RL = 200KΩ
VH = 1.4 - 1.6V
VREF
GND
RSGND
Gas
ams Datasheet Page 3
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Pin Assignment
Figure 3:
Pin Diagram
Figure 4:
Pin Description
Pin Number Pin Name Description
1 Sensor+ Sensor output (VOUT)
2 Heater+ Heater Input (VH)
3 Sensor- Connect to Ground or 0V
4 Heater- Connect to Ground or 0V
Pin Assignment
Top View
4
3
2
1
P
in 1 Corner
Exposed Die
ƩĂĐŚWĂĚ
Page 4 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These are
stress ratings only. Functional operation of the device at these
or any other conditions beyond those indicated under Electrical
Characteristics is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability.
Figure 5:
Absolute Maximum Ratings
Note(s):
1. When VH is produced by PWM of a VDD above 1.8V the duty cycle (%) must not exceed 1.8V2 / VDD2
Symbol Parameter Min Max Units Comments
Electrical Parameters
VH
Maximum Heater
Voltage (VH) (1) 1.8 V
Electrostatic Discharge
ESDHBM Human Body Model ±1000 V
Environmental Conditions
TAMB Ambient Temperature
for Operation -5 50 oC
TStrg Storage Temperature -40 125 oC
RHNC Relative Humidity
(non-condensing) 10 95 %
MSL Moisture Sensitivity
Level 1Represents an unlimited
floor life time
Absolute Maximum Ratings
ams Datasheet Page 5
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Electrical Characteristics
Figure 6:
Electrical Characteristics
Note(s):
1. Based on a sensor measurement duty cycle of 2.5%, heater ON for 1.5s (0.5s @ 1.6V, 1s @ 1.4V) and then heater OFF for 58.5s (0V)
2. Typical values at 25°c and 50% RH.
Parameters Conditions Min Typ(2) Max Units
Recommended Heater Voltage (VH)In constant power mode 1.4 V
Average Power Consumption (PAV) Pulsed heating mode (1) 0.9 mW
Peak Power Consumption (PDC) Constant power mode VH = 1.4V 33 mW
Heater Resistance (RH)V
H = 1.4V @ 50% RH50 58 66 Ω
Sensor Resistance In Clean Air (Ra) VH = 1.4V @ 50% RH10 1600 kΩ
Lifetime VH = 1.4V >5 years
Electrical Characteristics
Page 6 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − Detailed Description
Sensor Performance
Sensitivity is defined as the sensor’s resistance in clean air (Ra)
divided by the sensor’s resistance at a specific gas
concentration level at 50% relative humidity and 25°C ambient
temperature (Rg). The following chart shows the typical
sensitivity of CCS801 to CO, Ethanol and Toluene (as an example
VOC gas) in constant power mode with a heater voltage (VH) of
1.4V.
Figure 7:
Typical Sensitivity of CCS801 to CO, Ethanol and Toluene in Constant Power Mode (VH = 1.4V)
Note(s): CCS801 performance in terms of resistance levels and
sensitivities will change during early life use. This change in
resistance is greatest over the first 48 hours of operation.
However, the MOX software libraries for CCS801 support
different operating modes and controls the burn-in period
allowing eCO2 and TVOC readings to be used from first
power-on after 60minutes of operation.
Detailed Description
ams Datasheet Page 7
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Application Information
Figure 8:
Recommended Application Circuit
Note(s):
1. The recommended application circuit including the MCU works with a +3.3V supply voltage (VDD)
2. The sensor can be operated in pulsed mode to reduce overall power consumption. In this case the Heater VH is only driven for a
fraction of the time at regular intervals under the control of an external MCU with an integrated ADC and DAC.
3. The MCU controls and regulates the DC voltage (0V to +3.0V) supplied to the Heater VH through a DAC and external an OP-AMP.
4. An ADC input is required on the MCU to measure the sensor resistance optionally communicates with the host system via +3.3V I2C
bus.
5. Control of the sensor bias is via an external MOSFET (p-channel) and a GPIO to turn ON / OFF the MOSFET as power to the sensor
bias is only when needed for the ADC measurements. If not driven the MOSFET input should be pulled high.
6. A minimum load resistor (RL) value of 200k is recommended.
7. For more information please refer to the CCS801 design guidelines application note AN000363.
Application Information
GND
CCS801
VOC Sensor Microcontroller
(Host Processor)
ADC_Sensor_ Input
Pin2: Heater+
Pin1: Sensor+
Pins: 3 & 4
+
-
GND
VDD_3V3
NX2301P
VDD_3V3
200KΩ ± 1%
39Ω ± 1%
DAC Output
+
VDD_3V3
GND
-
ADC_Heater_Input
GPIO
ADC
DAC
I2C
Controller
I2C_SCL_3V3
I2C_SDA_3V3
ADC
Sensing
Layer
Integrated
Heater
10KΩ
Page 8 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS 801 − Pac ka ge I nfo rmat ion
DFN Package Outline
Figure 9:
DFN Package Drawings
Note(s):
1. All dimensions are in millimeters.
Package Information
Green
RoHS
DESCRIPTION
MIN NOM MAX
TOTAL THICKNESS
A 0.95 1.0 1.05
STAND OFF
A1 0 0.035 0.05
LEAD WIDTH
b 0.7 0.75 0.8
BODY SIZE
D 3 BSC
E 2 BSC
LEAD PITCH
e 1.0 BSC
EP SIZE
J 1.06 1.16 1.26
K 1.3 1.4 1.5
LEAD LENGTH
L 0.25 0.3 0.35
L1 0.35 0.4 0.45
ams Datasheet Page 9
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Package Information
The recommended package footprint or landing pattern for
CCS801 is shown below:
Figure 10:
Recommended Package Footprint for CCS801
Note(s):
1. All dimensions are in millimeters.
2. PCB land pattern in Green dash lines
3. Pin numbers are in Red
4. Add 0.05mm all around the nominal lead width and length for the PCB land pattern
Top View
4
3
2
1
1.5
0.45
0.85
1.30
0.45
0.85
Pin 1 Corner
Page 10 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − Ordering & Contact Information
Figure 11:
Ordering Information
Note(s):
1. Refer to JEDEC J-STD020 lead-free standard for typical soldering reflow profile
2. Refer to application note AN000364 on device assembly guidelines
3. Refer to application note AN000363 on CCS801 hardware design guidelines.
Technical Support is available at:
www.ams.com/Technical-Support
Provide feedback about this document at:
www.ams.com/Document-Feedback
For further information and requests, e-mail us at:
ams_sales@ams.com
For sales offices, distributors and representatives, please visit:
www.ams.com/contact
Headquarters
ams AG
Tobelbader Strasse 30
8141 Premstaetten
Austria, Europe
Tel: +43 (0) 3136 500 0
Website: www.ams.com
Ordering Code Description Package MOQ
CCS801B-COPR5K CCS801B VOC sensor for indoor air
quality monitoring 2mm x 3mm x 1mm DFN 5000
CCS801B-COPD500 CCS801B VOC sensor for indoor air
quality monitoring 2mm x 3mm x 1mm DFN 500
Ordering & Contact Information
ams Datasheet Page 11
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − RoHS Compliant & ams Green Statement
RoHS: The term RoHS compliant means that ams AG products
fully comply with current RoHS directives. Our semiconductor
products do not contain any chemicals for all 6 substance
categories, including the requirement that lead not exceed
0.1% by weight in homogeneous materials. Where designed to
be soldered at high temperatures, RoHS compliant products are
suitable for use in specified lead-free processes.
ams Green (RoHS compliant and no Sb/Br): ams Green
defines that in addition to RoHS compliance, our products are
free of Bromine (Br) and Antimony (Sb) based flame retardants
(Br or Sb do not exceed 0.1% by weight in homogeneous
material).
Important Information: The information provided in this
statement represents ams AG knowledge and belief as of the
date that it is provided. ams AG bases its knowledge and belief
on information provided by third parties, and makes no
representation or warranty as to the accuracy of such
information. Efforts are underway to better integrate
information from third parties. ams AG has taken and continues
to take reasonable steps to provide representative and accurate
information but may not have conducted destructive testing or
chemical analysis on incoming materials and chemicals. ams AG
and ams AG suppliers consider certain information to be
proprietary, and thus CAS numbers and other limited
information may not be available for release.
RoHS Compliant & ams Green
Statement
Page 12 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − Copyrights & Disclaim er
Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten,
Austria-Europe. Trademarks Registered. All rights reserved. The
material herein may not be reproduced, adapted, merged,
translated, stored, or used without the prior written consent of
the copyright owner.
Devices sold by ams AG are covered by the warranty and patent
indemnification provisions appearing in its General Terms of
Trade. ams AG makes no warranty, express, statutory, implied,
or by description regarding the information set forth herein.
ams AG reserves the right to change specifications and prices
at any time and without notice. Therefore, prior to designing
this product into a system, it is necessary to check with ams AG
for current information. This product is intended for use in
commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or
high reliability applications, such as military, medical
life-support or life-sustaining equipment are specifically not
recommended without additional processing by ams AG for
each application. This product is provided by ams AG “AS IS”
and any express or implied warranties, including, but not
limited to the implied warranties of merchantability and fitness
for a particular purpose are disclaimed.
ams AG shall not be liable to recipient or any third party for any
damages, including but not limited to personal injury, property
damage, loss of profits, loss of use, interruption of business or
indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing,
performance or use of the technical data herein. No obligation
or liability to recipient or any third party shall arise or flow out
of ams AG rendering of technical or other services.
Copyrights & Disclaimer
ams Datasheet Page 13
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Document Status
Document Status Product Status Definition
Product Preview Pre-Development
Information in this datasheet is based on product ideas in
the planning phase of development. All specifications are
design goals without any warranty and are subject to
change without notice
Preliminary Datasheet Pre-Production
Information in this datasheet is based on products in the
design, validation or qualification phase of development.
The performance and parameters shown in this document
are preliminary without any warranty and are subject to
change without notice
Datasheet Production
Information in this datasheet is based on products in
ramp-up to full production or full production which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade
Datasheet (discontinued) Discontinued
Information in this datasheet is based on products which
conform to specifications in accordance with the terms of
ams AG standard warranty as given in the General Terms of
Trade, but these products have been superseded and
should not be used for new designs
Document Status
Page 14 ams Datasheet
Document Feedback [v1-04] 2018-Apr-23
CCS801 − Revision Information
Note(s):
1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision.
2. Correction of typographical errors is not explicitly mentioned.
Changes from 1-02 (2016-Dec-19) to current revision 1-04 (2018-Apr-23) Page
1-02 (2016-Dec-19) to 1-03 (2017-Mar-27)
Updated Figure 11 10
1-03 (2017-Mar-27) to 1-04 (2018-Apr-23)
Updated Product Overview 1
Added note below Figure 6 5
Updated notes under Figure 7 6
Updated Figure 8 7
Updated Figure 11 10
Revision Information
ams Datasheet Page 15
[v1-04] 2018-Apr-23 Document Feedback
CCS801 − Content Guide
1 General Description
1Product Overview
2 Key Benefits & Features
2 Applications
2 Application Diagram
3 Pin Assignment
4Absolute Maximum Ratings
5 Electrical Characteristics
6 Detailed Description
6 Sensor Performance
7 Application Information
8 Package Information
8DFN Package Outline
10 Ordering & Contact Information
11 RoHS Compliant & ams Green Statement
12 Copyrights & Disclaimer
13 Document Status
14 Revision Information
Content Guide