DS18S20

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DS18S20

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Output Type Digital
Accuracy +/- 2 C
Minimum Operating Temperature - 55 C
Maximum Operating Temperature + 125 C
Package / Case TO-92-3
Interface Type 1-Wire
Supply Voltage - Min 3 V
Supply Voltage - Max 5.5 V
Configuration Local
Resolution 9 bit
Shutdown No Shutdown
Mounting Style Through Hole
Brand Analog Devices / Maxim Integrated
Product Temperature Sensors
Product Type Board Mount Temperature Sensor ICs
Series DS18S20
Subcategory Sensors
Temperature Threshold Programmable
Type Temperature Sensor

Tổng quan

Description

The DS18S20 is a digital temperature sensor produced by Maxim Integrated (now part of Analog Devices). It operates on the 1-Wire bus protocol, allowing multiple devices to be connected in a single data line, which simplifies wiring and reduces costs in sensor networks.
This sensor can measure temperatures ranging from -55°C to +125°C with a resolution of 0.5°C. It features a unique 64-bit serial code for addressing, enabling multiple DS18S20 sensors to be used on the same bus without conflicts. The device is powered by a single supply voltage of 3.0V to 5.5V and offers both parasite power and external power modes.
The DS18S20 is widely used in various applications, including HVAC systems, weather stations, and industrial temperature monitoring, due to its accuracy, ease of use, and flexibility in systems design. Its ability to interface directly with microcontrollers makes it a popular choice for DIY electronics and embedded systems.

Features

The DS18S20 is a digital temperature sensor with the following key features:
1. Temperature Range: Measures temperatures from -55°C to +125°C (-67°F to +257°F) with a typical accuracy of ±0.5°C from -10°C to +85°C.
2. Digital Output: Communicates via a single-wire interface, simplifying wiring and reducing the number of required pins.
3. Resolution: Offers 9 to 12 bits of resolution, allowing for configurable precision.
4. Power Supply: Operates on a voltage range of 3.0V to 5.5V, supporting various applications.
5. Device Identification: Each DS18S20 has a unique 64-bit serial code, enabling multiple sensors to be connected on the same bus for easy identification.
6. Low Power Consumption: Features a low power mode for extended battery life in portable applications.
7. User-Friendly: Simple integration into microcontroller projects, commonly used in home automation, HVAC, and environmental monitoring.
These features make the DS18S20 a versatile choice for temperature sensing applications.

Package

The DS18S20 is available in a TO-92 package type, which resembles a cylindrical can with three leads. It is also offered in a surface-mount package (SMD) option for compact applications.

Pinout

The DS18S20 is a digital temperature sensor from Maxim Integrated (now part of Analog Devices), featuring a total of three pins.
1. GND (Pin 1): This is the ground connection for the sensor.
2. DQ (Pin 2): This is the data pin used for one-wire communication. It is the primary interface for sending and receiving temperature data.
3. VDD (Pin 3): This is the power supply pin. The DS18S20 can operate on 3.0V to 5.5V.
The DS18S20 converts temperature measurements into a digital signal, which can be read by a microcontroller or microprocessor via the one-wire interface. It provides a temperature range of -55°C to +125°C with a resolution of 9 to 12 bits, making it suitable for various temperature-sensing applications.

Manufacturer

The DS18S20 is manufactured by Maxim Integrated, a company known for designing and producing analog and mixed-signal integrated circuits. Maxim Integrated specializes in various semiconductor solutions, including sensors, amplifiers, data converters, and microcontrollers, catering to a wide range of applications in industries such as automotive, industrial, consumer electronics, and telecommunications. The DS18S20 itself is a digital temperature sensor that communicates over a 1-Wire interface, making it suitable for temperature monitoring in various electronic applications. In 2021, Maxim Integrated was acquired by Analog Devices, Inc., further expanding its portfolio and market reach in the semiconductor industry.

Application

The DS18S20 is commonly used in various applications, including temperature monitoring in HVAC systems, weather stations, and industrial processes. It is also utilized in home automation for heating and cooling control, as well as in medical devices for body temperature measurements. Additionally, it finds use in food storage and safety systems, and has applications in research and environmental monitoring where precise temperature readings are essential.

Equivalent

The DS18S20 is a digital thermometer chip that is compatible with the 1-Wire protocol. Equivalent products include the DS18B20, which offers similar functionality with a wider temperature range and higher resolution. Another option is the DS1820, which also provides digital temperature measurement but with different specifications. These alternatives can be used in many applications that require temperature sensing.

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