1、 1 附附 录录： 外文资料与中文翻译外文资料与中文翻译 外文资料：外文资料： DS1820 FEATURESFEATURES Unique 1WireTM interface requires only one port pin for communication Multidrop capability simplifies distributed temperature sensing applications Requires no external components Can be powered from data line Zero standby power required
2、 Measures temperatures from 55C to +125C in 0.5C increments. Fahrenheit equivalent is 67F to +257F in 0.9F increments Temperature is read as a 9bit digital value. Converts temperature to digital word in 200 ms (typ.) Userdefinable, nonvolatile temperature alarm settings Alarm search command identifi
3、es 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 DESCRIPTIONDESCRIPTION The DS1820 Digital Thermometer provides 9
4、bit temperature readings which indicate the temperature of the device. Information is sent to/from the DS1820 over a 1Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS1820. Power for reading, writing, and performing temperature conversions
5、 can be derived from the data line itself with no need for an external power source. Because each DS1820 contains a unique silicon serial number, multiple DS1820s can exist on the same 1Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is
6、 useful include HVAC environmental 2 controls, sensing temperatures inside buildings, equipment or machinery, and in process monitoring and control. DETAILED PIN DESCRIPTION OVERVIEW The block diagram of Figure 1 shows the major components of the DS1820. The DS1820 has three main data components: 1) 64bit lasered ROM, 2) temperature and sensor, 3) nonvolatile temperature alarm triggers TH and TL. The device derives its power from the 1Wire communication
