SI7021-A10

series introduction

# SI7021 - A10 Product Series Introduction

## Overview
The SI7021 - A10 product series represents a cutting - edge line of integrated humidity and temperature sensors developed by industry - leading experts. These sensors are designed to provide highly accurate and reliable measurements in a wide range of applications, making them an ideal choice for various industries such as HVAC (Heating, Ventilation, and Air Conditioning), industrial automation, environmental monitoring, and consumer electronics.

## Key Features

### High Accuracy
One of the standout features of the SI7021 - A10 series is its exceptional accuracy. The humidity sensor offers an accuracy of ±3% relative humidity (RH) over a wide operating range, ensuring precise and consistent measurements. For temperature sensing, it provides an accuracy of ±0.4°C, which is crucial for applications where even small temperature variations can have a significant impact. This high level of accuracy allows for more precise control and monitoring in systems that rely on these measurements.

### Low Power Consumption
In today's energy - conscious world, power efficiency is a top priority. The SI7021 - A10 sensors are designed with low power consumption in mind. They operate on a low supply voltage range, typically between 1.9V and 3.6V, and consume very little current during both active and standby modes. This makes them suitable for battery - powered applications, where long battery life is essential. For example, in wireless environmental monitoring devices, the low power consumption of these sensors allows for extended periods of operation without frequent battery replacements.

### Digital Interface
The SI7021 - A10 sensors feature a standard I²C (Inter - Integrated Circuit) digital interface. This interface simplifies the connection between the sensor and microcontrollers or other digital devices. It allows for easy communication and data transfer, enabling seamless integration into existing systems. The digital output also eliminates the need for complex analog - to - digital conversion circuits, reducing the overall system complexity and cost.

### Small Form Factor
The sensors in the SI7021 - A10 series come in a compact and surface - mountable package. Their small size makes them easy to integrate into space - constrained applications. Whether it's a small wearable device or a densely packed industrial control panel, the small form factor of these sensors allows for flexible placement and design.

### Long - Term Stability
Over time, sensor performance can degrade due to environmental factors such as temperature, humidity, and chemical exposure. The SI7021 - A10 series is engineered to provide long - term stability. It has excellent resistance to environmental stressors, ensuring that the accuracy and reliability of the measurements remain consistent over an extended period. This reduces the need for frequent calibration and maintenance, saving time and cost for end - users.

## Technical Specifications

### Humidity Measurement
- **Measurement Range**: 0% to 100% RH
- **Accuracy**: ±3% RH (typical) from 10% to 90% RH at 25°C
- **Resolution**: 0.04% RH

### Temperature Measurement
- **Measurement Range**: - 40°C to 125°C
- **Accuracy**: ±0.4°C (typical) from - 10°C to 85°C
- **Resolution**: 0.01°C

### Supply Voltage
- **Operating Range**: 1.9V to 3.6V

### I²C Interface
- **Standard Mode**: 100 kbps
- **Fast Mode**: 400 kbps

## Applications

### HVAC Systems
In HVAC systems, accurate humidity and temperature measurements are essential for maintaining a comfortable and healthy indoor environment. The SI7021 - A10 sensors can be used to monitor the

Images for reference

SI702x-A10-GMR SERIES

related Documents

• Si70xx Designer Guide

Datasheets

• SI7021
• Si7021

Partlist