规格

• Description:This is the latest DS18B20 1-Wire digital temperature sensor from Maxim IC.　Reports degrees C with 9 to 12-bit precision, -55C to 125C(+/-0.5C).　Each sensor has a unique 64-Bit Serial number etched into it - allows for a huge number of sensors to be d on one data bus.　This is a wonderful part that is the corner stone of many data-logging and temperature control projects.Features:Unique 1-WireR interface requires only one port pin for communication
• Each device has a unique 64-bit serial code stored in an onboard ROM
• Multidrop capability simplifies distributed temperature sensing applications
• Requires no external components
• Can be powered from data line.　Power supply range is 3.0V to 5.5V
• Measures temperatures from 55°C to +125°C
• ±0.5°C accuracy from 10°C to +85°C
• Thermometer resolution is r-selectable from 9 to 12 bits
• Converts temperature to 12-bit digital word in 750ms(max.)
• User-definable nonvolatile(NV) alarm settings
• Alarm search command identifies and addresses devices whose temperature is outside of programmed limits(temperature alarm condition)
• Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system