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[v1-00] 2015-Apr-30 Document Feedback iAQ-Core Indoor Air Quality Sensor Module The iAQ-Core sensor module is used to measure VOC levels and provide CO 2 equivalent and TVOC equivalent predictions. The data is available via I²C bus. The sensor itself is protected by a plastic cap and a filter membrane. The sensor module can be soldered directly to a host circuit board with selective or reflow soldering via the edge connectors. The sensor is protected by a membrane, which should not be removed. Note(s): Please read the I²C addressing instructions carefully. An undefined use of the I²C interface could harm the iAQ-Core module and cause a loss of functionality. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of iAQ-Core, Indoor Air Quality sensor module are listed below: Figure 1: Added Value of Using iAQ-Core Sensor Module
Applications
- Smart Home
- Internet of Things
- H V A C
- Thermostats Benefits Features
- Reliable evaluation of indoor air quality
- Output of relative CO 2 equivalents (ppm) and TVOC equivalents (ppb)
- High sensitivity and fast response
- Sensing range: 450 – 2000 ppm CO 2 equivalents 125 – 600 ppb TVOC equivalents
- I ² C i n t e r f a c e
- Micro size for convenient installation
- MEMS metal oxide sensor technology
- SMD type package
- Reflow capable
- Module with automatic baseline correction
- Low power consumption • 66 mW (maximum in continuous mode)
- 9 mW (maximum in pulsed mode) General Description
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − Pin Assignments Figure 2: Pin Diagram Figure 3: Pin Description Pin Diagram: iAQ-Core sensor module. Pin Number Pin Name Comment
1 N C N o t c o n n e c t e d
2 S C L I ² C s e r i a l c l o c k
3 GND Ground
4 SDA I²C serial data
5 N C N o t c o n n e c t e d
6 V C C + 3 . 3 V Pin Assignments
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − Detailed Description Figure 14: Standard Communication via I²C (Resistance Value) Resistance Value: The last four bytes contain the resistance value. For the calculation of the resistance only byte4, byte5 and byte6 are relevant, because byte3 is zero. After the last requested byte, the master sends a not acknowledge.
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Detailed Description Figure 15: Standard Communication via I²C (Prediction Value TVOC) Prediction Value TVOC: The last two bytes contain the TVOC equivalence value. After the last requested byte, the master has to send a not acknowledge and the communication shall be ended with a STOP condition.
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Detailed Description TVOC Figure 19: Information Structure (TVOC) The last two bytes contain the TVOC equivalent values, which gives the information about the relative indoor air quality. The value is given in TVOC (ppb) equivalent and the calculation is shown in the following example tvoc eq = byte 7 * 2 8 + byte 8 Byte0 Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8 (EQ3)
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − Mechanical Information Figure 23: iAQ-Core Sensor Module iAQ-Core Sensor Module: Dimensions in mm Mechanical Information 7.6 17.8 4.9 11.2 15.2 12.3 2.54 GreenRoHS
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Mechanical Information Figure 24: iAQ-Core Marking Note(s) and/or Footnote(s): 1. Drawing not to scale. 2. All dimensions in mm.
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Ordering & Contact Information Figure 27:
Ordering Information
Buy our products or get free samples online at: www.ams.com/ICdirect 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 Tobelbaderstrasse 30
8141 Unterpremstaetten
Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com Ordering Code Marking Delivery Form Delivery Quantity Comment iAQ-Core C iAQ CORE C Tray 90 iAQ-Core (continuous operation mode) iAQ-Core P iAQ CORE P Tray 90 iAQ-Core (pulsed operation mode) Ordering & Contact Information
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − 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 specif ied 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 unde rway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to prov ide 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
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, 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 appe aring in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding th e information set forth herein. ams AG reserves the right to ch ange 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 wa rranties, 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 th ird party shall arise or flow out of ams AG rendering of technical or other services. Copyrights & Disclaimer
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − 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
[v1-00] 2015-Apr-30 Document Feedback iAQ-Core − Revision Information Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may diff er from page and figure numbers in the current revision. 2. Correction of typographical er rors is not explicitly mentioned. Changes from (2014-Oct) to current revision 1-00 (2015-Apr-30) Page Content of Applied Sensor datasheet was updated to the latest ams design Revision Information
Document Feedback [v1-00] 2015-Apr-30 iAQ-Core − Content Guide
1 General Description
1 Key Benefits & Features
1 Applications
2 Pin Assignments
3 Electrical Characteristics
4 Environmental Specifications
5 Detailed Description
5 I²C Interface Description
5P h y s i c a l I n t e r f a c e 5C l o c k S t r e t c h i n g 5A d d r e s s