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| 型號(hào)： | LM75BD |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 工業(yè)控制 |
| 英文描述： | Digital temperature sensor and thermal watchdog |
| 封裝： | LM75BD<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<Always Pb-free,;LM75BD<SOT96-1 (SO8)|<<http://www.nxp.com/packages/SOT96-1.html<1<Always Pb-free,; |
| 文件頁(yè)數(shù)： | 8/29頁(yè) |
| 文件大?。?/td> | 164K |
| 代理商： | LM75BD |
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LM75B_2
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 9 December 2008
8 of 29
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 2’s complement format with the resolution of 0.125
°
C.
Table 8
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
°
C from the 11-bit Temp data is:
1. If the Temp data MSByte bit D10 = 0, then the temperature is positive and Temp value
(
°
C) = +(Temp data)
×
0.125
°
C.
2. If the Temp data MSByte bit D10 = 1, then the temperature is negative and
Temp value (
°
C) =
(2’s complement of Temp data)
×
0.125
°
C.
Examples of the Temp data and value are shown in
Table 9
.
B1
OS_COMP_INT R/W
OS operation mode selection
OS comparator
OS interrupt
device operation mode selection
normal
shutdown
0*
1
B0
SHUTDOWN
R/W
0*
1
Table 7.
Legend: * = default value.
Bit
Symbol
Conf register
…continued
Access Value Description
Table 8.
MSByte
7
D10
Temp register
LSByte
7
D2
6
5
4
3
2
1
0
6
5
4
X
3
X
2
X
1
X
0
X
D9
D8
D7
D6
D5
D4
D3
D1
D0
Table 9.
11-bit binary
(2’s complement)
011 1111 1000
011 1111 0111
011 1111 0001
011 1110 1000
000 1100 1000
000 0000 0001
000 0000 0000
111 1111 1111
Temp register value
Hexadecimal value
Decimal value
Value
3F8
3F7
3F1
3E8
0C8
001
000
7FF
1016
1015
1009
1000
200
1
0
1
+127.000
°
C
+126.875
°
C
+126.125
°
C
+125.000
°
C
+25.000
°
C
+0.125
°
C
0.000
°
C
0.125
°
C
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| LM75BDP | 制造商:NXP Semiconductors 功能描述:IC TEMP SENSOR DIGITAL 8-TSSOP 制造商:NXP Semiconductors 功能描述:IC, TEMP SENSOR, DIGITAL, 8-TSSOP |
| LM75BDP,118 | 功能描述:板上安裝溫度傳感器 I2C LOCAL +/- 20C TS DIGITAL TEMP SENSOR RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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