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| 型号： | LM75BD,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 6/37页 |
| 文件大小： | 520K |
| 描述： | IC TEMP SENSOR DIGITAL 8-SOIC |
| 特色产品： | Digital Temperature Sensor / Thermal Watchdog |
| 标准包装： | 100 |
| 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： | 管件 |
| 其它名称： | 935285837112 LM75BD LM75BD-ND |
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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
6 of 37
NXP Semiconductors
LM75B
Digital temperature sensor and thermal watchdog
In OS comparator mode, the OS output behaves like a thermostat. It becomes active
when the Temp exceeds the T
th(ots)
, and is reset when the Temp drops below the T
hys
.
Reading the device registers or putting the device into shutdown does not change the
state of the OS output. The OS output in this case can be used to control cooling fans or
thermal switches.
In OS interrupt mode, the OS output is used for thermal interruption. When the device is
powered-up, the OS output is first activated only when the Temp exceeds the T
th(ots)
; then
it remains active indefinitely until being reset by a read of any register. Once the OS output
has been activated by crossing T
th(ots)
and then reset, it can be activated again only when
the Temp drops below the T
hys
; then again, it remains active indefinitely until being reset
by a read of any register. The OS interrupt operation would be continued in this sequence:
T
th(ots)
trip, Reset, T
hys
trip, Reset, T
th(ots)
trip, Reset, T
hys
trip, Reset, etc. Putting the
device into the shutdown mode by setting the bit 0 of the configuration register also resets
the OS output.
In both cases, comparator mode and interrupt mode, the OS output is activated only if a
number of consecutive faults, defined by the device fault queue, has been met. The fault
queue is programmable and stored in the two bits, B3 and B4, of the Configuration
register. Also, the OS output active state is selectable as HIGH or LOW by setting
accordingly the configuration register bit B2.
At power-up, the device is put into normal operation mode, the T
th(ots)
is set to 80 癈, the
T
hys
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 first conversion is completed in about
100 ms.
The OS response to the temperature is illustrated in Figure 6
.
(1) OS is reset by either reading register or putting the device in shutdown mode. It is assumed that
the fault queue is met at each T
th(ots)
and T
hys
crossing point.
Fig 6. OS response to temperature
(1)
(1)
(1)
T
th(ots)
T
hys
OS reset
S active
OS reset
S active
OS output in comparator mode
OS output in interrupt mode
reading temperature limits
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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 |
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| LM75BDP/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 |
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