- 您现在的位置：买卖IC网 > PDF目录22050 > LM75AD/G-T (NXP Semiconductors)IC I2C TEMP SNSR/WATCHDOG 8-SOIC PDF资料下载
参数资料
| 型号： | LM75AD/G-T |
| 厂商： | NXP Semiconductors |
| 文件页数： | 8/24页 |
| 文件大小： | 137K |
| 描述： | IC I2C TEMP SNSR/WATCHDOG 8-SOIC |
| 标准包装： | 1 |
| 功能： | 温度监视系统（传感器），监视器 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±3°C（最小值） |
| 拓扑： | ADC（三角积分型），比较器，振荡器，寄存器库 |
| 输出类型： | 2 线串行，I²C? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 2.8 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 剪切带 (CT) |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名称： | 568-1889-1 |
LM75A_4
?NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 04 10 July 2007
8 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
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 signicant bits should be used, and the 5 least
signicant 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) = (2s complement of Temp data) ?0.125 癈.
Examples of the Temp data and value are shown in
T
ab
le
10.
Obviously, for 9-bit Temp data application in replacing the industry standard LM75, just
use only 9 MSB bits of the two bytes and disregard 7 LSB of the LSByte. The 9-bit Temp
data with 0.5 癈 resolution of the LM75A is dened exactly in the same way as for the
standard LM75 and it is here similar to the Tos and Thyst registers.
7.4.4 Overtemperature shutdown threshold (Tos) and hysteresis (Thyst) registers
These two registers, are write/read registers, and also called set-point registers. They are
used to store the user-dened temperature limits, called overtemperature shutdown
threshold (Tos) and hysteresis temperature (Thyst), for the device watchdog operation. At
the end of each conversion the Temp data will be compared with the data stored in these
two registers in order to set the state of the device OS output; see
Section
7.1.
Each of the set-point registers contains two 8-bit data bytes consisting of one MSByte and
one LSByte the same as register Temp. However, only 9 bits of the two bytes are used to
store the set-point data in 2s complement format with the resolution of 0.5 癈.
T
ab
le
11
and
T
ab
le
12 show the bit arrangement of the Tos data and Thyst data in the data bytes.
Notice that because only 9-bit data are used in the set-point registers, the device uses
only the 9 MSB of the Temp data for data comparison.
Table 10. Temp register value
11-bit binary
(2s 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
111 0011 1000
738
200
25.000 癈
110 0100 1001
649
439
54.875 癈
110 0100 1000
648
440
55.000 癈
相关PDF资料 |
PDF描述 |
|---|---|
| EMC44DRYH | CONN EDGECARD 88POS .100 EXTEND |
| AIML-0805-R068K-T | INDUCTOR MULTILAYER 0.068UH 0805 |
| VJ1206A220KBLAT4X | CAP CER 22PF 630V 10% NP0 1206 |
| ECA14DTMD | CONN EDGECARD 28POS R/A .125 SLD |
| 1N4933RLG | DIODE FAST REC 1A 50V DO41 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM75ADP | 制造商:NXP Semiconductors 功能描述:Digital Temp Sensor 2-Wire,LM75ADP |
| LM75ADP,118 | 功能描述:板上安装温度传感器 TEMP SENSOR DIGITAL RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| LM75ADP,118 | 制造商:NXP Semiconductors 功能描述:IC, TEMP SENSOR, 0.125C, 3C, TSSOP-8 |
| LM75ADP,118-CUT TAPE | 制造商:NXP 功能描述:LM75A Series SMD 5.5 mA Digital Temperature Sensor w/ Thermal Watchdog TSSOP-8 |
| LM75ADP/DG,118 | 功能描述:板上安装温度传感器 DIGITAL TEMP SENSOR AND THERMAL WATCHDOG RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
发布紧急采购，3分钟左右您将得到回复。