Gas Sensor Module for
Refrigeration Air Quality ZMOD4450 Datasheet Description Features 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; for example, food
storage and shipping. The sensor is a 12-pin LGA assembly (3.0 x
3.0 x 0.7 mm) that consists of a gas sense element and a CMOS
signal conditioning IC. The module’s sense element consists of a
heater element on a silicon-based MEMS structure and a metal
temperature sensor. It measures the MOx conductivity, which is a
function of the gas concentration. Measurement of gases associated with food ripening and
storage: ethylene, amines, volatile sulfur compounds The measurement results can be read via an I2C interface with the
user’s microprocessor, which processes the data to determine the
levels of gases present and to indicate the likelihood of food spoilage. With the ZMOD4450’s low operating current consumption, the
sensor is an excellent choice for low-voltage and low-power battery
applications. Built-in nonvolatile memory (NVM) stores the configuration and provides space for arbitrary user data. I2C interface: up to 400kHz
Configurable alarm/interrupt output with static and adaptive
levels Configurable methods of operation based on application and
use case
Heater driver and regulation loop for constant heater voltage
or constant heater resistance
Internal auto-compensated temperature sensor; not stress
sensitive Adjustable ADC resolution for optimal speed versus
resolution: 16-bit maximum …
