Overview
The DS18B20+ is a programmable resolution 1-Wire digital thermometer produced by Analog Devices Inc./Maxim Integrated. This sensor is designed to provide high-precision temperature measurements and is widely used in various applications due to its robust features and ease of integration. The DS18B20+ can measure temperatures in the range of -55°C to +125°C with an accuracy of ±0.5°C in the range of -10°C to +85°C. It communicates over a 1-Wire bus, requiring only one data line and ground for communication with a central microprocessor, making it ideal for multisensor systems.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Operating Voltage | 3V to 5.5V | V |
| Temperature Range | -55°C to +125°C | °C |
| Accuracy | ±0.5°C (typical, -10°C to +85°C) | °C |
| Resolution | 9-bit to 12-bit (programmable) | bits |
| Conversion Time | 750ms at 12-bit | ms |
| Unique Address | 64-bit serial code | - |
| Power Mode | Local power or parasite power | - |
| Standby Current | 750-1000 nA | nA |
| Active Current | 1-1.5 mA (VDD = 5V) | mA |
Key Features
- Programmable Resolution: The DS18B20+ offers programmable resolution from 9-bit to 12-bit, allowing for flexible precision in temperature measurements.
- 1-Wire Communication: It communicates over a 1-Wire bus, requiring only one data line and ground, making it simple to integrate with microcontrollers.
- Parasite Power Capability: The sensor can derive power directly from the data line, eliminating the need for an external power supply.
- Alarm Function: It features an alarm function with nonvolatile user-programmable upper and lower trigger points.
- Unique Addressing: Each sensor has a unique 64-bit serial code, enabling multiple sensors to function on the same 1-Wire bus.
- Low Power Consumption: The sensor has low standby and active current requirements, making it suitable for battery-powered applications.
- Rugged Construction: Available in various packages, including waterproof options, making it suitable for harsh environments.
Applications
- Industrial and Commercial Temperature Monitoring: Ideal for monitoring temperatures in industrial processes, HVAC systems, and commercial environments.
- Consumer Electronics: Used in various consumer products that require temperature monitoring.
- Automotive and Transportation: Suitable for temperature monitoring in automotive and transportation systems.
- Medical and Scientific Instrumentation: Used in medical devices and scientific instruments where precise temperature measurement is critical.
- Hard Environment Monitoring: Measures temperature in harsh environments such as chemical solutions, mines, or soil.
Q & A
- What is the operating temperature range of the DS18B20+?
The DS18B20+ operates in the temperature range of -55°C to +125°C.
- What is the accuracy of the DS18B20+?
The accuracy is ±0.5°C in the range of -10°C to +85°C.
- How does the DS18B20+ communicate with a microcontroller?
It communicates over a 1-Wire bus, requiring only one data line and ground.
- Can the DS18B20+ operate without an external power supply?
- What is the resolution of the DS18B20+?
The resolution is programmable from 9-bit to 12-bit.
- How long does it take for the DS18B20+ to convert temperature data at 12-bit resolution?
The conversion time is 750ms at 12-bit resolution.
- Can multiple DS18B20+ sensors be used on the same 1-Wire bus?
- What are the typical applications of the DS18B20+?
It is used in industrial and commercial temperature monitoring, consumer electronics, HVAC systems, automotive, medical, and scientific instrumentation.
- Is the DS18B20+ compatible with various microcontrollers?
- What is the standby current of the DS18B20+?
The standby current is between 750-1000 nA.
