參數(shù)資料
型號: DS1775R7+T&R
廠商: Maxim Integrated
文件頁數(shù): 3/14頁
文件大?。?/td> 394K
描述: IC THERMOM/STAT DIG 111 SOT-23-5
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 3,000
功能: 溫度計,恒溫計
傳感器類型: 內(nèi)部
感應(yīng)溫度: -55°C ~ 125°C
精確度: ±3°C(最小值)
拓?fù)洌?/td> ADC,比較器,寄存器庫
輸出類型: I²C?/SMBus?
輸出警報:
輸出風(fēng)扇:
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -55°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SC-74A,SOT-753
供應(yīng)商設(shè)備封裝: SOT-23-5
包裝: 帶卷 (TR)
DS1775
 
 
3 of 14
 
Figure 1. Block Diagram
 
 
 
OPERATION
Measuring Temperature
The core of DS1775 functionality is its direct-to-digital temperature sensor. The DS1775 measures
temperature through the use of an on-chip temperature measurement technique with an operating range
from -55癈 to +125癈. Temperature conversions are initiated upon power-up, and the most recent result
is stored in the thermometer register. Conversions are performed continuously unless the user intervenes
by altering the configuration register to put the DS1775 into a shutdown mode. Regardless of the mode
used, the digital temperature can be retrieved from the temperature register by setting the pointer to that
location (00h, power-up default). The DS1775 power-up default has the sensor automatically performing
9-bit conversions continuously. Details on how to change the settings after power-up are contained in the
Programming section. 
 
The resolution of the temperature conversion is configurable (9, 10, 11, or 12 bits), with 9-bit readings the
default state. This equates to a temperature resolution of 0.5癈, 0.25癈, 0.125癈, or 0.0625癈. Following
each conversion, thermal data is stored in the thermometer register in twos complement format; the
information can be retrieved over the 2-wire interface with the device pointer set to the temperature
register. Table 2 describes the exact relationship of output data to measured temperature. The table
assumes the DS1775 is configured for 12-bit resolution; if the device is configured in a lower resolution
mode, those bits contain zeros. The data is transmitted serially over the 2-wire serial interface, MSb first.
The MSb of the temperature register contains the sign (S) bit, denoting whether the temperature is
positive or negative. For Fahrenheit usage, a lookup table or conversion routine must be used.
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