RENESAS ZMOD4450AI1V

The ZMOD4450 Gas Sensor Module is designed for detecting gases associated with food ripening or rotting, and is targeted for use in refrigeration air quality (RAQ) applications (e.g., food storage and shipping, including humid and dusty applications with the possibility of water spray, condensation, or immersion). It is a 12-LGA assembly (3.0×3.0×0.7 mm) that consists of a gas sense element and a CMOS signal conditioning IC. The module’s sense element consists of heater element on a Si-based MEMS structure and a metal oxide (MOx) chemiresistor. The signal conditioner controls the sensor temperatures and measures the MOx conductivity, which is a function of the gas concentration. The measurement results can be read via an I2C interface with the user’s microprocessor, which processes the data. The provided firmware can be used to determine the level of gases present and to indicate the likelihood of food spoilage. With its low operating current consumption, the ZMOD4450 is an excellent choice for low-voltage and low-power battery applications. Built-in nonvolatile memory (NVM) stores the module configuration and calibration data.

• Measurement of gases associated with food ripening and storage: volatile organic compounds (including ethylene), amines, volatile sulfur compounds
• Configurable methods of operation based on application and use case
• Heater driver and regulation loop for constant resistance, minimizing effect of environmental temperature on signal
• Internal auto-compensated temperature sensor; not stress sensitive
• I2C interface: up to 400kHz
• Built-in nonvolatile memory (NVM) for module-specific data
• Low average power consumption in the mW range
• Firmware upgradable platform for application optimizations
• No external trimming components required
• External reset pin (active-LOW)
• Customization for mobile, industrial, and consumer applications
• Siloxane resistant
• RoHS compliant
• Supply voltage: 1.7V to 3.6V
• Package: 12-LGA
• Target operation temperature: 0℃ to 25℃
• Water and dustproof versions available (IP67 certified)
• Available assembly sizes:
  • 3.0×3.0×0.7 mm (standard version)
  • 3.0×3.0×0.9 mm (IP67 version)

• Refrigerator systems control
• Measurement of meat, fruit and vegetable quality
• Monitors for shipping and storage conditions
• Odor remediation systems