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| 型號： | LM75AD,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 5/24頁 |
| 文件大小： | 137K |
| 描述： | IC TEMP SENSOR DIGITAL 8-SOIC |
| 特色產(chǎn)品： | NXP - I2C Interface |
| 標準包裝： | 100 |
| 功能： | 溫度監(jiān)視系統(tǒng)（傳感器），監(jiān)視器 |
| 傳感器類型： | 內(nèi)部 |
| 感應溫度： | -55°C ~ 125°C |
| 精確度： | ±3°C（最小值） |
| 拓撲： | ADC（三角積分型），比較器，振蕩器，寄存器庫 |
| 輸出類型： | 2 線串行，I²C? |
| 輸出警報： | 無 |
| 輸出風扇： | 是 |
| 電源電壓： | 2.8 V ~ 5.5 V |
| 工作溫度： | -55°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SO |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 846 (CN2011-ZH PDF) |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名稱： | 568-4226-5 935269775112 LM75AD LM75AD-ND |
LM75A_4
?NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 04 10 July 2007
5 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
In both cases, comparator mode and interrupt mode, the OS output is activated only if a
number of consecutive faults, dened by the device fault queue, has been met. The fault
queue is programmable and stored in the two bits, B3 and B4, of the Conguration
register. Also, the OS output active state is selectable as HIGH or LOW by setting
accordingly the conguration register bit B2.
At power-up, the device is put into normal operation mode, the T
os
is set to 80 癈, the T
hyst
is set to 75 癈, the OS active state is selected LOW and the fault queue is equal to 1. The
temp reading data is not available until the rst conversion is completed in about 100 ms.
The OS response to the temperature is illustrated in
Figure
4.
7.2 I
2
C-bus serial interface
The LM75A can be connected to a compatible 2-wire serial interface I
2
C-bus as a slave
device under the control of a controller or master device, using two device terminals, SCL
and SDA. The controller must provide the SCL clock signal and write/read data to/from the
device through the SDA terminal. Notice that if the I
2
C-bus common pull-up resistors have
not been installed as required for I
2
C-bus, then an external pull-up resistor, about 10 k&,
is needed for each of these two terminals. The bus communication protocols are
described in
Section
7.10.
7.3 Slave address
The LM75A slave address on the I
2
C-bus is partially dened by the logic applied to the
device address pins A2, A1 and A0. Each of them is typically connected either to GND for
logic 0, or to V
CC
for logic 1. These pins represent the three LSB bits of the device 7-bit
address. The other four MSB bits of the address data are preset to 1001 by hard wiring
inside the LM75A.
T
ab
le
4 shows the devices complete address and indicates that up to
(1) OS is reset by either reading register. It is assumed that the fault queue is met at each T
os
and
T
hyst
crossing point.
Fig 4. OS response to temperature
002aad032
(1)
(1)
(1)
T
os
T
hyst
OS reset
OS active
OS reset
OS active
OS output in comparator mode
OS output in interrupt mode
reading temperature limits
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| LM75ADP | 制造商:NXP Semiconductors 功能描述:Digital Temp Sensor 2-Wire,LM75ADP |
| LM75ADP,118 | 功能描述:板上安裝溫度傳感器 TEMP SENSOR DIGITAL RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
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