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ZMOD4450 Datasheet

Gas Sensor

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Gas Sensor Module for
Refrigeration Air Quality
ZMOD4450
Datasheet
Description
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
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 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.
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 spoil-
age. 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 config-
uration and provides space for arbitrary user data.
Typical Applications
Refrigerator systems control
Measurement of fruit and vegetable quality
Monitors for fruit and vegetable shipping and storage
conditions for fruit and vegetable quality
Physical Characteristics
Target operation temperature: 0°C to 25°C
Supply voltage: 1.7V to 3.6V
Package: 12-LGA
Assembly size: 3.0 3.0 0.7 mm
Available Support
ZMOD4450 Evaluation Kit
Manuals, application notes, and white papers
Instructional videos
Programming libraries, example codes, and algorithm
support to optimize performance
Features
Measurement of gases associated with food ripening and
storage: ethylene, amines, volatile sulfur compounds
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
I2C interface: up to 400kHz
Configurable alarm/interrupt output with static and adaptive
levels
Adjustable ADC resolution for optimal speed versus
resolution: 16-bit maximum
Built-in nonvolatile memory (NVM) for user data
Low average power consumption in the mW range
Firmware upgradable platform for application optimizations,
such as ultra-low-power battery applications
No external trimming components required
External reset pin (active-LOW)
Customization for mobile and consumer applications
Siloxane resistant
VSS
ZMOD4450
Gas Sensor Module
VDDIO
VDDH
VDD
VSUPPLY
VSS
Power
Supply
SDA
SCL
INT
RES_N
Algorithms
Post-Processing
© 2019 Integrated Device Technology, Inc.
1
March 7, 2019


Integrated Device Technology Electronic Components Datasheet

ZMOD4450 Datasheet

Gas Sensor

No Preview Available !

ZMOD4450 Datasheet
Contents
1. Pin Assignments...........................................................................................................................................................................................4
2. Pin Descriptions............................................................................................................................................................................................4
3. Absolute Maximum Ratings..........................................................................................................................................................................5
4. Operating Conditions....................................................................................................................................................................................5
5. Electrical Characteristics ..............................................................................................................................................................................6
6. Block Diagram ..............................................................................................................................................................................................7
7. Sensor Module Characteristics.....................................................................................................................................................................8
7.1 Gas Sensor Module.............................................................................................................................................................................8
7.2 Internal Temperature Sensor...............................................................................................................................................................8
8. Gas Sensor Module Characteristics .............................................................................................................................................................9
8.1 Characteristics for Typical Gas Stimulation.........................................................................................................................................9
8.2 Environmental Temperature and Humidity ........................................................................................................................................10
8.3 Accuracy and Conditioning................................................................................................................................................................10
9. Package Outline Drawings .........................................................................................................................................................................11
10. Assembly Restrictions, Operation, and Integration Notes ..........................................................................................................................11
11. Test and Calibration ...................................................................................................................................................................................12
12. I2C Interface and Data Transmission Protocol ...........................................................................................................................................12
13. Glossary .....................................................................................................................................................................................................14
14. Ordering Information...................................................................................................................................................................................15
15. Revision History..........................................................................................................................................................................................15
List of Figures
Figure 1. ZMOD4450 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 4°C for Ethylene Stimulation...........................................................................................................................10
Figure 4. Typical Solder Profile.........................................................................................................................................................................11
Figure 5. I2C Data Transmission Protocol........................................................................................................................................................12
Figure 6. Bus Timing.........................................................................................................................................................................................13
© 2019 Integrated Device Technology, Inc.
2
March 7, 2019


Part Number ZMOD4450
Description Gas Sensor
Maker IDT
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ZMOD4450 Datasheet PDF






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