CCS801 Ultra-Low Power Analog VOC Sensor for Indoor Air Quality Monitoring General Description 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 500C 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 (eCO 2) sensor to represent eCO 2 levels in real world environments, where the main source of VOCs is from humans. For CCS801 a supply voltage (V H) 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). V H can be operated in constant or pulsed mode to reduce power consumption. The sensor resistance (R S) is typically determined using a series load resistor (R L), a reference voltage (VREF), and by reading an output voltage (V OUT) with an Analogue-to-Digital Converter (ADC). The reference voltage (V REF) 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. ams Datasheet [v1-04] 2018-Apr-23 Page 1 Document Feedback 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 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 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 VREF RL = 200K VOUT Gas 1 3 RS 2 VH = 1.4 - 1.6V Page 2 Document Feedback RH GND 4 GND ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Pin Assignment Pin Assignment Figure 3: Pin Diagram Exposed Die W Pin 1 Corner 1 4 2 3 Top View Figure 4: Pin Description Pin Number Pin Name 1 Sensor+ Sensor output (VOUT) 2 Heater+ Heater Input (VH) 3 Sensor- Connect to Ground or 0V 4 Heater- Connect to Ground or 0V ams Datasheet [v1-04] 2018-Apr-23 Description Page 3 Document Feedback CCS801 - Absolute Maximum Ratings 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 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 1 Represents an unlimited floor life time Note(s): 1. When V H is produced by PWM of a VDD above 1.8V the duty cycle (%) must not exceed 1.8V2 / VDD2 Page 4 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Electrical Characteristics Electrical Characteristics Figure 6: Electrical Characteristics 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) VH = 1.4V @ 50% RH 50 Sensor Resistance In Clean Air (Ra) VH = 1.4V @ 50% RH 10 Lifetime VH = 1.4V 58 >5 66 1600 k years 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. ams Datasheet [v1-04] 2018-Apr-23 Page 5 Document Feedback CCS801 - Detailed Description 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 25C 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 (V H) 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 eCO 2 and TVOC readings to be used from first power-on after 60minutes of operation. Page 6 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Application Information Application Information Figure 8: Recommended Application Circuit VDD_3V3 DAC Output Integrated Heater Pin2: Heater+ + 39 1% DAC GND ADC_Heater_Input CCS801 VDD_3V3 ADC Microcontroller VOC Sensor (Host Processor) 10K GPIO I2C_SCL_3V3 NX2301P I2C Controller 200K 1% Sensing Layer Pin1: Sensor+ I2C_SDA_3V3 VDD_3V3 + ADC_Sensor_ Input ADC Pins: 3 & 4 GND GND 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 V H 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 V H 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 (R L) value of 200k is recommended. 7. For more information please refer to the CCS801 design guidelines application note AN000363. ams Datasheet [v1-04] 2018-Apr-23 Page 7 Document Feedback CCS801 - Package Information Package Information DFN Package Outline Figure 9: DFN Package Drawings DESCRIPTION SYMBOL 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 D 3 BSC E 2 BSC RoHS BODY SIZE LEAD PITCH e J 1.0 BSC 1.06 1.16 1.26 EP SIZE K 1.3 1.4 1.5 L 0.25 0.3 0.35 L1 0.35 0.4 0.45 Green LEAD LENGTH Note(s): 1. All dimensions are in millimeters. Page 8 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Package Information The recommended package footprint or landing pattern for CCS801 is shown below: Figure 10: Recommended Package Footprint for CCS801 0.45 Pin 1 Corner 1 4 0.85 2 3 0.85 1.5 0.45 1.30 Top View 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 ams Datasheet [v1-04] 2018-Apr-23 Page 9 Document Feedback CCS801 - Ordering & Contact Information Ordering & Contact Information Figure 11: Ordering Information 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 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 Page 10 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - RoHS Compliant & ams Green Statement 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. ams Datasheet [v1-04] 2018-Apr-23 Page 11 Document Feedback CCS801 - Copyrights & Disclaimer Copyrights & Disclaimer 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. Page 12 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) ams Datasheet [v1-04] 2018-Apr-23 Product Status Definition 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 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 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 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 Page 13 Document Feedback CCS801 - Revision Information Revision Information 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 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. Page 14 Document Feedback ams Datasheet [v1-04] 2018-Apr-23 CCS801 - Content Guide Content Guide ams Datasheet [v1-04] 2018-Apr-23 1 1 2 2 2 General Description Product Overview Key Benefits & Features Applications Application Diagram 3 4 5 Pin Assignment Absolute Maximum Ratings Electrical Characteristics 6 6 Detailed Description Sensor Performance 7 Application Information 8 8 Package Information DFN Package Outline 10 11 12 13 14 Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Page 15 Document Feedback