ADIDS18B20U+T&R
Overview
The DS18B20U+T&R is a digital temperature sensor providing 9-bit to 12-bit Celsius measurements with a unique 1-wire interface. This interface allows for multidrop capability, where multiple sensors can share a single data line, and enables the device to be powered directly from the data signal via parasite power. It operates over a wide supply range of 3V to 5.5V and covers a temperature range of -55 to +125 degrees Celsius.
Why Choose This Part
The primary advantage is the 1-wire protocol, which significantly reduces wiring complexity and PCB trace requirements. It requires no external components for operation and includes on-board EEPROM for storing alarm thresholds and configuration settings. The 8-uMAX package offers a compact surface-mount footprint for space-constrained designs while maintaining a broad 12-bit measurement resolution.
Applications
Key Specifications
Getting Started
To interface with this sensor, use a microcontroller with a 1-wire library, such as the OneWire library for Arduino or the DallasTemperature library. Ensure a 4.7k ohm pull-up resistor is placed between the DQ data line and VDD for stable communication. For initial evaluation, the DS18B20-PAR or a standard breadboard-friendly TO-92 variant is often used before transitioning to the 8-uMAX surface-mount version.
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