Overview
The DS18B20U+ is a programmable resolution 1-Wire digital thermometer produced by Analog Devices Inc./Maxim Integrated. This device is designed for high-precision temperature monitoring and is ideal for use in multisensor systems. It communicates over a 1-Wire bus, requiring only one data line and ground for communication with a central microprocessor. The DS18B20U+ can also derive power directly from the data line, known as parasite power, eliminating the need for an external power supply. Each device has a unique 64-bit serial code, allowing multiple DS18B20s to function on the same 1-Wire bus, making it simple to control many sensors distributed over a large area.
Key Specifications
| Parameter | Value |
|---|---|
| Temperature Measurement Range | -55°C to +125°C |
| Resolution | 9-bit to 12-bit (configurable) |
| Accuracy | ±0.5°C (typical in the -10°C to +85°C range) |
| Voltage Supply | 3V to 5.5V |
| Power Mode | Local power or parasite power |
| Standby Current | 750 nA to 1000 nA |
| Active Current | 1 mA to 1.5 mA (at VDD = 5V) |
| Package Types | TO-92, Micro-MAX, Thin Shrink Small-Outline, Small-Outline IC |
Key Features
- Programmable resolution from 9-bit to 12-bit, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C respectively.
- Alarm function with nonvolatile user-programmable upper and lower trigger points.
- Unique 64-bit serial code for each device, allowing multiple devices to function on the same 1-Wire bus.
- Parasite power capability, eliminating the need for an external power supply.
- Low power consumption, suitable for battery-powered applications.
- High accuracy and stability in temperature measurements.
- Minimal external components required for operation.
Applications
- Industrial and commercial temperature monitoring.
- Heating, ventilation, and air conditioning (HVAC) systems.
- Consumer electronics.
- Automotive and transportation applications.
- Medical and scientific instrumentation.
- Process monitoring and control systems.
- Temperature monitoring systems inside buildings, equipment, or machinery.
Q & A
- What is the temperature measurement range of the DS18B20U+?
The DS18B20U+ measures temperatures from -55°C to +125°C.
- What are the possible resolutions of the DS18B20U+?
The resolution is programmable from 9-bit to 12-bit, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C respectively.
- How does the DS18B20U+ communicate with a microprocessor?
The DS18B20U+ communicates over a 1-Wire bus, requiring only one data line and ground.
- Can the DS18B20U+ operate without an external power supply?
- What is the unique feature of each DS18B20U+ device?
Each device has a unique 64-bit serial code, allowing multiple devices to function on the same 1-Wire bus.
- What are the typical applications of the DS18B20U+?
Applications include HVAC systems, industrial and commercial temperature monitoring, consumer electronics, automotive applications, and medical instrumentation.
- What is the accuracy of the DS18B20U+ in the typical operating range?
The accuracy is ±0.5°C in the -10°C to +85°C range.
- What are the power consumption characteristics of the DS18B20U+?
The standby current is 750 nA to 1000 nA, and the active current is 1 mA to 1.5 mA at VDD = 5V.
- Is the DS18B20U+ RoHS compliant?
- What are the available package types for the DS18B20U+?
The available packages include TO-92, Micro-MAX, Thin Shrink Small-Outline, and Small-Outline IC.
