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| 型号： | LM75AD/G-T |
| 厂商： | NXP Semiconductors |
| 文件页数： | 10/24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
10 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
The main difference between the two modes is that in OS comparator mode, the OS
output becomes active when Temp has exceeded T
os
and reset when Temp has dropped
below T
hyst
, reading a register or putting the device into shutdown mode does not change
the state of the OS output; while in OS interrupt mode, once it has been activated either
by exceeding T
os
or dropping below T
hyst
, the OS output will remain active indenitely until
reading a register, then the OS output is reset.
Temperature limits T
os
and T
hyst
must be selected so that T
os
> T
hyst
. Otherwise, the OS
output state will be undened.
7.7 OS fault queue
Fault queue is dened as the number of faults that must occur consecutively to activate
the OS output. It is provided to avoid false tripping due to noise. Because faults are
determined at the end of data conversions, fault queue is also dened as the number of
consecutive conversions returning a temperature trip. The value of fault queue is
selectable by programming the two bits B4 and B3 (OS_F_QUE[1:0]) in register Conf.
Notice that the programmed data and the fault queue value are not the same.
T
ab
le
14
shows the one-to-one relationship between them. At power-up, fault queue data = 0 and
fault queue value = 1.
7.8 Shutdown mode
The device operation mode is selected by programming bit B0 (SHUTDOWN) of register
Conf. Setting bit SHUTDOWN to logic 1 will put the device into shutdown mode. Resetting
bit SHUTDOWN to logic 0 will return the device to normal mode.
In shutdown mode, the device draws a small current of approximately 3.5 礎 and the
power dissipation is minimized; the temperature conversion stops, but the I
2
C-bus
interface remains active and register write/read operation can be performed. The OS
output remains unchanged.
7.9 Power-up default and power-on reset
The LM75A always powers-up in its default state with:
" Normal operation mode
" OS comparator mode
" T
os
= 80 癈
" T
hyst
= 75 癈
" OS output active state is LOW
" Pointer value is logic 0
Table 14. Fault queue table
Fault queue data
Fault queue value
OS_F_QUE[1]
OS_F_QUE[0]
Decimal
0
0
1
0
1
2
1
0
4
1
1
6
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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 |
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