Overview
The DS18B20-PAR+T&R is a digital thermometer produced by Maxim Integrated, now part of Analog Devices Inc. This device is designed to provide accurate temperature measurements with a range of features that make it versatile and reliable. The DS18B20-PAR+T&R offers 9-bit to 12-bit Celsius temperature measurements and includes an alarm function with nonvolatile user-programmable upper and lower trigger points. One of its key features is the ability to operate without an external power supply, using a method called "parasite power" where power is derived directly from the data line. This thermometer communicates over a 1-Wire bus, requiring only one data line and ground for communication with a central microprocessor.
Key Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature Range | -55°C to +125°C |
| Temperature Measurement Range | -55°C to +125°C |
| Resolution | 9-bit to 12-bit (programmable) |
| Accuracy | ±0.5°C over the -10°C to +85°C range |
| Voltage Supply | 3.0V to 5.5V |
| Conversion Time | 94ms (9-bit), 188ms (10-bit), 375ms (11-bit), 750ms (12-bit) |
| Communication Interface | 1-Wire bus |
| Power Mode | Parasite power mode |
| Packages Available | TO-92, 8-pin SOIC |
Key Features
- Programmable Resolution: The DS18B20-PAR+T&R offers programmable resolution from 9-bit to 12-bit, allowing for flexible temperature measurement precision.
- Alarm Function: Includes a nonvolatile user-programmable upper and lower trigger points for alarm conditions.
- Parasite Power: Can operate without an external power supply by deriving power from the data line.
- Unique 1-Wire Interface: Requires only one digital pin for communication, making it easy to integrate into systems.
- High Accuracy: Provides accurate temperature measurements with an accuracy of ±0.5°C over the -10°C to +85°C range.
- Wide Operating Temperature Range: Suitable for various applications with an operating temperature range of -55°C to +125°C.
- Low Power Consumption: Ideal for battery-powered applications due to its low power consumption in parasite power mode.
Applications
- Industrial and Commercial Temperature Monitoring: Used in industrial and commercial settings for monitoring temperature in various environments.
- Heating, Ventilation, and Air Conditioning (HVAC) Systems: Ideal for temperature monitoring and control in HVAC systems.
- Automotive and Transportation Applications: Suitable for temperature monitoring in automotive and transportation systems.
- Medical and Scientific Instrumentation: Used in medical and scientific instruments where precise temperature measurement is critical.
- Consumer Electronics: Found in various consumer electronics requiring temperature monitoring.
- Hard Environment Monitoring: Used in hard environments such as chemical solutions, mines, or soil due to its rugged construction and waterproof options.
Q & A
- What is the operating temperature range of the DS18B20-PAR+T&R?
The operating temperature range is -55°C to +125°C.
- How does the DS18B20-PAR+T&R communicate with a microprocessor?
It communicates over a 1-Wire bus, requiring only one data line and ground for communication.
- What is the resolution of the DS18B20-PAR+T&R?
The resolution is programmable from 9-bit to 12-bit.
- Does the DS18B20-PAR+T&R require an external power supply?
No, it can operate in parasite power mode, deriving power from the data line.
- What is the accuracy of the DS18B20-PAR+T&R?
The accuracy is ±0.5°C over the -10°C to +85°C range.
- What types of packages are available for the DS18B20-PAR+T&R?
It is available in TO-92 and 8-pin SOIC packages.
- How long does the temperature conversion take for the DS18B20-PAR+T&R?
The conversion time is 94ms (9-bit), 188ms (10-bit), 375ms (11-bit), or 750ms (12-bit).
- Is the DS18B20-PAR+T&R RoHS compliant?
- What are some common applications of the DS18B20-PAR+T&R?
It is used in industrial and commercial temperature monitoring, HVAC systems, automotive and transportation applications, medical and scientific instrumentation, and consumer electronics.
- Can the DS18B20-PAR+T&R be used in harsh environments?
