Gas Sensor Module for ZMOD4450 Refrigeration Air Quality Datasheet Description Features The ZMOD4450 Gas Sensor Module is designed for detecting Measurement of gases associated with food ripening and gases associated with food ripening or rotting, and is targeted for storage: volatile organic compounds (including ethylene), use in refrigeration air quality (RAQ) applications (e.g., food amines, volatile sulfur compounds storage and shipping, including humid and dusty applications with Configurable methods of operation based on application and the possibility of water spray, condensation, or immersion). It is a use case 12-LGA assembly (3.0 3.0 0.7 mm) that consists of a gas sense Heater driver and regulation loop for constant resistance, element and a CMOS signal conditioning IC. The modules sense minimizing effect of environmental temperature on signal element consists of heater element on a Si-based MEMS structure 2 I C interface: up to 400kHz and a metal oxide (MOx) chemiresistor. The signal conditioner controls the sensor temperatures and measures the MOx Built-in nonvolatile memory (NVM) for module-specific data conductivity, which is a function of the gas concentration. The Low average power consumption in the mW range 2 measurement results can be read via an I C interface with the Firmware upgradable platform for application optimizations users microprocessor, which processes the data. No external trimming components required The provided firmware can be used to determine the level of gases External reset pin (active-LOW) present and to indicate the likelihood of food spoilage. With its low Customization for mobile, industrial, and consumer operating current consumption, the ZMOD4450 is an excellent applications choice for low-voltage and low-power battery applications. Built-in nonvolatile memory (NVM) stores the module configuration and Siloxane resistant calibration data. RoHS compliant Supply voltage: 1.7V to 3.6V Package: 12-LGA Typical Applications Target operation temperature: 0C to 25C Refrigerator systems control Water and dustproof versions available (IP67 certified) Measurement of meat, fruit and vegetable quality Available assembly sizes: Monitors for shipping and storage conditions 3.0 3.0 0.7 mm (standard version) Odor remediation systems 3.0 3.0 0.9 mm (IP67 version) Available Support ZMOD4450 Application Circuit ZMOD4450 Evaluation Kit Manuals, application notes, and white papers VSUPPLY VSS VSS Instructional videos Power VDDIO Programming libraries, example codes, and algorithm Supply support to optimize performance VDDH VDD ZMOD4450 SDA Gas Sensor Module SCL Algorithms Post-Processing INT RES N 2021 Renesas Electronics Corporation 1 June 30, 2021 ZMOD4450 Datasheet Contents 1. Pin Information .............................................................................................................................................................................................4 1.1 Pin Assignments ..................................................................................................................................................................................4 1.2 Pin Descriptions ...................................................................................................................................................................................4 2. Absolute Maximum Ratings ..........................................................................................................................................................................5 3. Operating Conditions ....................................................................................................................................................................................5 4. Electrical Characteristics ..............................................................................................................................................................................6 5. Block Diagram ..............................................................................................................................................................................................7 6. Sensor Module Characteristics .....................................................................................................................................................................8 6.1 Gas Sensor Module .............................................................................................................................................................................8 7. Gas Sensor Module Characteristics .............................................................................................................................................................9 7.1 Characteristics for Typical Gas Stimulation .........................................................................................................................................9 7.2 Environmental Temperature and Humidity ........................................................................................................................................10 7.3 Accuracy and Conditioning ................................................................................................................................................................10 7.4 Sensor Module Algorithm and Firmware ...........................................................................................................................................11 8. Assembly Restrictions, Operation, Integration Notes, and Storage ............................................................................................................11 9. Test and Calibration ...................................................................................................................................................................................12 10. I2C Interface and Data Transmission Protocol ...........................................................................................................................................13 11. Glossary .....................................................................................................................................................................................................15 12. Package Outline Drawings .........................................................................................................................................................................16 13. Marking Diagram ........................................................................................................................................................................................16 14. Ordering Information ...................................................................................................................................................................................16 15. Revision History ..........................................................................................................................................................................................17 List of Figures Figure 1. Pin Assignments for 12-LGA Module Top View ................................................................................................................................4 Figure 2. Gas Response to Typical Gases and Levels of Expected Refrigeration Gases ..................................................................................9 Figure 3. Humidity Influence at 4C for Ethylene Stimulation ...........................................................................................................................10 Figure 4. Typical Solder Profile .........................................................................................................................................................................12 Figure 5. I2C Data Transmission Protocol ........................................................................................................................................................13 Figure 6. Bus Timing .........................................................................................................................................................................................14 2021 Renesas Electronics Corporation 2 June 30, 2021