Indoor Air Quality Sensor Renesas ZMOD4410

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Introduction

Indoor air quality is a big deal these days, maybe because we connected it to health and well-being. And, in times of covid, the world has already seen that sometimes humans need to stay indoors, for the health and safety of entire beings. But, in those days too, we humans need quality air so that we may. The air leads us to a higher quality of life. Fresh breathable air that reduces the risk of chronic conditions. And, for this purpose humans employ the air quality sensor. So in this tutorial, we are going to study “Indoor Air Quality Sensor Renesas ZMOD4410”.

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What is Air Gas Quality Sensor?

An air quality sensor is an electronic device that measures pollutants, such as oxidizable or reducible gases like carbon monoxide, and hydrocarbons. We design a gas Sensor Module for detecting total volatile organic compounds, measuring carbon dioxide, and controlling indoor air quality in distinct smell-based use
cases.

An Overview of ZMOD4410 Sensor

Renesas ZMOD4410 comprises a gas sensing element and a CMOS signal conditioning Integrated circuit inside. The sensing element of the module includes the heater element and a metal oxide (MOx) chemiresistor. The signal conditioner controls and measures the MOx conductivity and also controls temperature. We can read the measurement results through an I2C interface with any microcontroller or processor.

Specification

Supply Voltage 1.7 ~3.6 V
Ambient Temperature Range for Sensor Module Operation -40~65 °C
Operation Temperature Sequence of Sense Element [a] 100~450 °C
Maximum Analog and I/O Supply Voltage=-0.4~3.63 V
VA_IO, VD_IO Maximum Voltage at all Analog and Digital I/O Pins = -0.5~ VDDIO + 0.5 V
Maximum Difference in Voltage between VDD and VDDH Pins= 0.4 V
IIN Input Current into any Pin Except Supply Pins (Latch-Up Immunity)= -100~ 100 mA
VHBM1 Electrostatic Discharge Tolerance – Human Body Model (HBM) =2000 V
VCDM Electrostatic Discharge Tolerance – Charged Device Model (CDM)
on Packaged Module= 750 V
TAMB-MAX Maximum Ambient Temperature Range of Sensor Module= -40~125 °C
TSTOR Storage Temperature= -50~125 °C

Features

Measurement of total organic compounds (TVOC) concentrations and indoor air quality (IAQ)
Module algorithm estimates carbon dioxide level (eCO₂)
Additional waterproof package available supporting IP67 rating (ZMOD4410AI3V and ZMOD4410AI3R)
Algorithm to set a control signal to trigger an external action based on IAQ and odor change
Multiplexed input channel for the heater, resistance, and temperature measurements
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
External reset pin (active-LOW)
Siloxane resistant

Pinout ZMOD4410

Pins Number	Pin Name	Type	Description
1	SCL	Input	Serial clock for the I2C interface
2	SDA	Input/Output	Serial data for the I2C interface. Default 7-bit slave address: 32HEX.
3	INT	Output	Interrupt signal (push-pull):  HIGH when a measurement is running  LOW when a measurement has finished Note, use edge detection on the falling edges
4	NC	–	Do not connect. 5 VDD Supply Voltage supply for the ZMOD4410.
5	Vdd	Supply	Voltage supply for the ZMOD4410
6	VSS	Ground	Ground reference for the ZMOD4410.
7	VSS	Ground	Ground reference for the ZMOD4410
8	NC	–	Do not connect.
9	VSS	Ground	Ground reference for the ZMOD4410
10	VDDH	Supply	Voltage supply for the integrated heater in the ZMOD4410.
11	RES_N	Input	ZMOD4410 reset; active low.
12	VDDIO	Supply	Voltage supply for I/O-interface in ZMOD4410