- 您现在的位置：买卖IC网 > PDF目录19554 > LM92CIM/NOPB (National Semiconductor)IC SENSOR/THERM COMP DIG 8-SOIC PDF资料下载
参数资料
| 型号： | LM92CIM/NOPB |
| 厂商： | National Semiconductor |
| 文件页数： | 16/25页 |
| 文件大小： | 1472K |
| 描述： | IC SENSOR/THERM COMP DIG 8-SOIC |
| 标准包装： | 95 |
| 系列： | PowerWise® |
| 功能： | 温度监控系统（传感器） |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 150°C |
| 精确度： | ±1.5°C（最小值） |
| 拓扑： | ADC，比较器，寄存器库 |
| 输出类型： | 2 线串行，I²C? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -55°C ~ 150°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-SOP |
| 包装： | 管件 |
| 产品目录页面： | 1314 (CN2011-ZH PDF) |
| 其它名称： | *LM92CIM *LM92CIM/NOPB LM92CIM |
LM 92
SNIS110D MARCH 2000REVISED MARCH 2013
www.ti.com
APPLICATION HINTS
The temperature response graph in Figure 16 depicts a typical application designed to meet ACPI requirements.
In this type of application, the temperature scale is given an arbitrary value of "granularity", or the window within
which temperature notification events should occur. The LM92 can be programmed to the window size chosen by
the designer, and will issue interrupts to the processor whenever the window limits have been crossed. The
internal flags permit quick determination of whether the temperature is rising or falling.
The T_CRIT limit would typically use its separate output to activate hardware shutdown circuitry separate from
the processor. This is done because it is expected that if temperature has gotten this high that the processor may
not be responding. The separate circuitry can then shut down the system, usually by shutting down the power
supply.
Note that the INT and T_CRIT_A outputs are separate, but can be wire-ORed together. Alternatively the
T_CRIT_A can be diode ORed to the INT line in such a way that a T_CRIT_A event activates the INT line, but an
INT event does not activate the T_CRIT_A line. This may be useful in the event that it is desirable to notify both
the processor and separate T_CRIT_A shutdown circuitry of a critical temperature alarm at the same time
(maybe the processor is still working and can coordinate a graceful shutdown with the separate shutdown
circuit).
To implement ACPI compatible sensing it is necessary to sense whenever the temperature goes outside the
window, issue an interrupt, service the interrupt, and reprogram the window according to the desired granularity
of the temperature scale. The reprogrammed window will now have the current temperature inside it, ready to
issue an interrupt whenever the temperature deviates from the current window.
To understand this graph, assume that at the left hand side the system is at some nominal temperature. For the
1st event temperature rises above the upper window limit, T
HIGH
, causing INT to go active. The system responds
to the interrupt by querying the LM92's status bits and determines that T
HIGH
was exceeded, indicating that
temperature is rising. The system then programs the temperature limits to a value higher by an amount equal to
the desired granularity. Note that in Event Interrupt Mode, reprogramming the limits has caused a second,
known, interrupt to be issued since temperature has been returned within the window. In Comparator Interrupt
Mode, the LM92 simply stops issuing interrupts.
The 2nd event is another identical rise in temperature. The 3rd event is typical of a drop in temperature. This is
one of the conditions that demonstrates the power of the LM92, as the user receives notification that a lower limit
is exceeded in such a way that temperature is dropping.
The Critical Alarm Event activates the separate T_CRIT_A output. Typically, this would feed circuitry separate
from the processor on the assumption that if the system reached this temperature, the processor might not be
responding.
16
Submit Documentation Feedback
Copyright ?20002013, Texas Instruments Incorporated
Product Folder Links: LM92
相关PDF资料 |
PDF描述 |
|---|---|
| EMA50DRMT-S288 | CONN EDGECARD 100POS .125 EXTEND |
| 180-M62-213R011 | CONN DB62 FMAL HD SLD DIP NICKEL |
| VI-B4R-CW-B1 | CONVERTER MOD DC/DC 7.5V 100W |
| ADT7461ARMZ-R7 | IC TEMP SENSOR DGTL 2CH 8MSOP |
| TAP686M006CRW | CAP TANT 68UF 6.3V 20% RADIAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM92CIMX | 功能描述:板上安装温度传感器 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 |
| LM92CIMX/NOPB | 功能描述:板上安装温度传感器 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 |
| LM92CIMXNOPB | 制造商:National Semiconductor 功能描述:Temp Sensor Digital Serial (2-Wire) 8-Pin SOIC N T/R |
| LM93 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Hardware Monitor with Integrated Fan Control for Server Management |
| LM93-1001 | 制造商:FLOWLINE 功能描述:Two Indicator, Windowed, 1/8 DIN, PC (13.9"h x 8.5"w x 6.7"d) |
发布紧急采购，3分钟左右您将得到回复。