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參數(shù)資料
型號(hào): LM75BD,112
廠商: NXP Semiconductors
文件頁(yè)數(shù): 9/37頁(yè)
文件大小: 520K
描述: IC TEMP SENSOR DIGITAL 8-SOIC
特色產(chǎn)品: Digital Temperature Sensor / Thermal Watchdog
標(biāo)準(zhǔn)包裝: 100
功能: 溫度監(jiān)視系統(tǒng)(傳感器),監(jiān)視器
傳感器類(lèi)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(三角積分型),比較器,振蕩器,寄存器庫(kù)
輸出類(lèi)型: 2 線串行,I²C?
輸出警報(bào): 無(wú)
輸出風(fēng)扇:
電源電壓: 2.8 V ~ 5.5 V
工作溫度: -55°C ~ 125°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SO
包裝: 管件
其它名稱(chēng): 935285837112
LM75BD
LM75BD-ND
LM75B
All information provided in this document is subject to legal disclaimers.
?NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 5  22 January 2014
9 of 37
NXP Semiconductors
LM75B
Digital temperature sensor and thermal watchdog
7.4.3   Temperature register
The Temperature register (Temp) holds the digital result of temperature measurement or
monitor at the end of each analog-to-digital conversion. This register is read-only and
contains two 8-bit data bytes consisting of one Most Significant Byte (MSByte) and one
Least Significant Byte (LSByte). However, only 11 bits of those two bytes are used to store
the Temp data in twos complement format with the resolution of 0.125 癈. Table 9
 shows
the bit arrangement of the Temp data in the data bytes.
 
When reading register Temp, all 16 bits of the two data bytes (MSByte and LSByte) are
provided to the bus and must be all collected by the controller to complete the bus
operation. However, only the 11 most significant bits should be used, and the 5 least
significant bits of the LSByte are zero and should be ignored. One of the ways to calculate
the Temp value in 癈 from the 11-bit Temp data is:
1. If the Temp data MSByte bit D10 = 0, then the temperature is positive and Temp value
(癈) = +(Temp data) ?0.125 癈.
2. If the Temp data MSByte bit D10 = 1, then the temperature is negative and
Temp value (癈) = -(twos complement of Temp data) ?0.125 癈.
Examples of the Temp data and value are shown in Table 10
.
 
B1
OS_COMP_INT   R/W
OS operation mode selection
0*
OS comparator
1
OS interrupt
B0
SHUTDOWN
R/W
device operation mode selection
0*
normal
1
shutdown
Table 8.
Conf register &continued
Legend: * = default value.
Bit
Symbol
Access
Value
Description
Table 9.
Temp register
MSByte
LSByte
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
D10    D9    D8    D7    D6    D5    D4    D3    D2    D1    D0
X
X
X
X
X
Table 10.   Temp register value
11-bit binary
(twos complement)
Hexadecimal value
Decimal value
Value
011 1111 1000
3F8
1016
+127.000 癈
011 1111 0111
3F7
1015
+126.875 癈
011 1111 0001
3F1
1009
+126.125 癈
011 1110 1000
3E8
1000
+125.000 癈
000 1100 1000
0C8
200
+25.000 癈
000 0000 0001
001
1
+0.125 癈
000 0000 0000
000
0
0.000 癈
111 1111 1111
7FF
-1
-0.125 癈
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