Overview
The DS18B20+CNH, produced by Analog Devices Inc./Maxim Integrated, is a highly versatile and reliable digital temperature sensor. This sensor is part of the DS18B20 family, known for its accuracy and dependability in providing temperature measurements across a wide range of applications, including HVAC systems, home automation, data centers, and cold chain logistics. The DS18B20+CNH simplifies integration into various electronic systems by requiring only one digital pin for communication via the 1-Wire interface. Its compact size, low power consumption, and rugged design make it an ideal choice for both hobbyists and professionals in consumer electronics, industrial automation, and scientific research.
Key Specifications
| Parameter | Specification |
|---|---|
| Temperature Range | -55°C to +125°C (-67°F to +257°F) |
| Temperature Resolution | 9-bit to 12-bit:
|
| Accuracy | ±0.5°C (from -10°C to +85°C) |
| Power Supply | 3.0V to 5.5V |
| Communication Protocol | 1-Wire interface |
| Conversion Time | Up to 750 ms (12-bit resolution) |
Key Features
- Unique 64-Bit Serial Code: Each sensor has a unique 64-bit serial code, allowing multiple sensors to be connected on the same 1-Wire bus and addressed individually.
- Parasite Power Mode: The sensor can draw power directly from the data line, eliminating the need for an external power supply.
- Nonvolatile Memory: Stores configuration information and temperature triggers in EEPROM memory.
- Compact Size: Available in small form factors, often in stainless steel tubes, enhancing durability and suitability for outdoor applications.
- Fast Conversion Time: Temperature readings can be updated quickly, with a maximum conversion time of 750 ms for 12-bit resolution.
- Alarm Function: Programmable high and low temperature alarms can inform the microcontroller of threshold breaches.
Applications
The DS18B20+CNH is versatile and can be used in a variety of applications, including:
- HVAC Environmental Controls: Monitoring and controlling temperature in heating, ventilation, and air conditioning systems.
- Home Automation: Integrating temperature sensing into smart home systems.
- Data Centers: Monitoring temperature to ensure optimal operating conditions.
- Cold Chain Logistics: Ensuring proper temperature control during the transportation and storage of perishable goods.
- Industrial Automation: Monitoring temperature in industrial equipment and machinery.
- Scientific Research: Precise temperature measurements in various scientific applications.
Q & A
- What is the temperature range of the DS18B20+CNH sensor?
The DS18B20+CNH can measure temperatures between -55°C and +125°C (-67°F to +257°F). - What are the available temperature resolutions for the DS18B20+CNH?
The sensor offers resolutions of 9-bit to 12-bit, providing readings with precision levels of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C respectively. - How accurate is the DS18B20+CNH sensor?
The sensor guarantees an accuracy of ±0.5°C from -10°C to +85°C. - What is the power supply range for the DS18B20+CNH?
The sensor can operate with a supply voltage range of 3.0V to 5.5V. - What communication protocol does the DS18B20+CNH use?
The sensor communicates via the 1-Wire interface. - Can the DS18B20+CNH operate without an external power supply?
Yes, it can operate in parasite power mode, drawing power directly from the data line. - How many DS18B20+CNH sensors can be connected to a single microcontroller pin?
Multiple sensors can be connected to the same 1-Wire bus, each identified by a unique 64-bit serial code. - What is the conversion time for the DS18B20+CNH sensor?
The maximum conversion time is 750 ms for 12-bit resolution. - Does the DS18B20+CNH have an alarm function?
Yes, it has programmable high and low temperature alarms. - What type of memory does the DS18B20+CNH use?
The sensor uses nonvolatile EEPROM memory to store configuration information and temperature triggers.
