GY21 SHT21 HTU21D 替代SI7021 温湿度传感器模块 I2C接口

SHT20资料：https://pan.baidu.com/s/1HrQkwECvGgQSHvt_RNdLdA

HTU21D资料：https://pan.baidu.com/s/1bq5nrav

SHT21模块和HTU21D模块可直接替代SI7021

模块，精度一致。

温湿度模块

GY21-SI7021-5V 温湿度传感器

模块型号：GY21-SHT21 GY-HTU21D

使用芯片：SHT21 HTU21D

供电电源：3-5v （带电平转换功能）

模块尺寸：10mm*12mm

重量：2g

提供ardhino测试代码：

Features

Precision Relative Humidity Sensor

± 3百 RH (max), 0–80百 RH

High Accuracy Temperature Sensor

±0.4 °C (max), –10 to 85 °C

0 to 100百 RH operating range

Up to –40 to +125 °C operating range

Wide operating voltage (1.9 to 3.6 V)

Low Power Consumption 150 μA active current

60 nA standby current

Factory-calibrated

I2C Interface

Integrated on-chip heater

3x3 mm DFN Package

Excellent long term stability

Optional factory-installed cover

Low-profile

Protection during reflow

Excludes liquids and particulates

Applications

HVAC/R

Thermostats/humidistats

Respiratory therapy

White goods

Indoor weather stations

Micro-environments/data centers

Automotive climate control and defogging

Asset and goods tracking

Mobile phones and tablets

The Si7021 I2C Humidity and Temperature Sensor is a monolithic CMOS IC

integrating humidity and temperature sensor elements, an analog-to-digital

converter, signal processing, calibration data, and an I2C Interface. The patented

use of industry-standard, low-K polymeric dielectrics for sensing humidity enables

the construction of low-power, monolithic CMOS Sensor ICs with low drift and

hysteresis, and excellent long term stability.

The humidity and temperature sensors are factory-calibrated and the calibration

data is stored in the on-chip non-volatile memory. This ensures that the sensors

are fully interchangeable, with no recalibration or software changes required.

The Si7021 is available in a 3x3 mm DFN package and is reflow solderable. It can

be used as a hardware- and software-compatible drop-in upgrade for existing RH/

temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing

over a wider range and lower power consumption. The optional factory-installed

cover offers a low profile, convenient means of protecting the sensor during

assembly (e.g., reflow soldering) and throughout the life of the product, excluding

liquids (hydrophobic/oleophobic) and particulates.

The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal

for measuring humidity, dew-point, and temperature, in applications ranging from

HVAC/R and asset tracking to industrial and consumer platforms.

使用芯片

SHT21 HTU21D

供电电源

3-5v

模块尺寸

10mm*12mm

重量

2g