Datasheet ZMOD4510 (IDT) - 8

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7. Sensor Module Characteristics 7.1 Gas Sensor Module Characteristics
The ZMOD4510 Gas Sensor Module detects typical outdoor gases based on studies and international standards for outdoor air quality. Characteristic module parameters are shown in Table 5. The ZMOD4510 uses a sequence of applied temperatures in order to sample the air and report a combined Air Quality Index based on the EPA standard. The sample rate to execute the sequence and detect outdoor air is 60 seconds. The sensor does not require an active or direct airflow onto the sensor module since diffusion of ambient gas does not limit the sensor response time.
Important:
The ZMOD4510 can also detect safety-relevant gases; however, the sensor is not designed to detect these interferants reliably and therefore it is not approved for use in any safety-critical or life-protecting applications. It must not be used in such applications, and IDT disclaims all liability for any such use.
Table 5. Gas Sensor Module Characteristics Symbol Parameter Conditions Minimum Typical Maximum Unit[a]
Measurement Range Ozone 20 500 ppb Measurement Range Nitrogen dioxide 20 500 ppb Humidity Range Non-condensing 0 90 % RH Temperature Range -40 65 °C Variation in sensor signal for Repeatability ±25 % consecutive exposures T-90 Response Time Limited by sample rate ±60 sec [a] The abbreviation ppb stands for “parts per bil ion” and is a molar ratio with the exponent of 10-9.
7.2 Internal Temperature Sensor Characteristics Table 6. Internal Temperature Sensor Characteristics Parameter Conditions Minimum Typical Maximum Unit
Temperature Resolution Range: -40°C to 65°C – 0.0165 – °C/LSB Tolerance Without calibration -5 – 5 K © 2019 Integrated Device Technology, Inc. 8 September 9, 2019 Document Outline 1. Pin Assignments 2. Pin Descriptions 3. Absolute Maximum Ratings 4. Operating Conditions 5. Electrical Characteristics 6. Block Diagram 7. Sensor Module Characteristics 7.1 Gas Sensor Module Characteristics 7.2 Internal Temperature Sensor Characteristics 8. Gas Sensor Module Characteristics 8.1 Typical Gas Stimulation 8.2 Environmental Temperature and Humidity 8.3 Accuracy and Conditioning 9. Assembly Restrictions, Operation, Integration Notes, and Storage 10. Test and Calibration 11. I2C Interface and Data Transmission Protocol 12. Related Websites and Software 13. Glossary 14. Package Outline Drawings 15. Marking Diagram 16. Ordering Information 17. Revision History