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參數(shù)資料
| 型號(hào)： | LM95245CIMMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Precision Remote Diode Digital Temperature Sensor with TruTherm⑩ BJT Beta Compensation Technology for 45nm Process |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 3Cel, SQUARE, SURFACE MOUNT |
| 封裝： | MO-187, MSOP-8 |
| 文件頁(yè)數(shù)： | 10/24頁(yè) |
| 文件大?。?/td> | 342K |
| 代理商： | LM95245CIMMX |
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9.
Configuration Register 1 defaults to 00h. This sets the
LM95245 as follows:
A.
The STOP/RUN defaults to the active/converting
mode.
The Local and Remote TCRIT and OS Masks are
reset to 0.
10. Configuration Register 2 defaults to 1Fh. This sets the
LM95245 as follows:
B.
A.
B.
Remote Diode digital filter defaults on.
The Remote Diode mode defaults to a typical Intel
processor on 45/65/90 nm process.
Diode Fault Mask bit for TCRIT defaults to 1.
Diode Fault Mask bit for OS defaults to 0.
Pin 6 Function defaults to Address Input function
(A0).
C.
D.
E.
1.3 SMBus INTERFACE
The LM95245 operates as a slave on the SMBus, so the
SMBCLK line is an input and the SMBDAT line is bidirectional.
The LM95245 never drives the SMBCLK line and it does not
support clock stretching. According to SMBus specifications,
the LM95245 has a 7-bit slave address. Three SMBus ad-
dresses can be selected by connecting pin 6 (A0) to either
Low, Mid-Supply or High voltages. The address selection ta-
ble below shows two sets of possible selections for the
LM95245CIMM and the LM95245CIMM-1.
LM95245CIMM
SMBus Device
Address
HEX
Low
18
State of the A0
Pin
LM95245CIMM-1
SMBus Device
Address
HEX
19
Binary
001 1000
Binary
001
1001
010
1001
100
1100
Mid-Supply
29
010 1001
29
High
4C
100 1100
4D
The OS/A0 pin, after power-up, defaults as an address select
input pin (A0). After power-up, the OS/A0 pin can only be
programmed as an OS output when it is in the “High” state.
Therefore, 4Ch is the only valid slave address that can be
used when the OS/A0 pin is programmed to function as an
OS output. When the OS/A0 pin is programmed to function
as an A0 input the LM95245 will immediately detect the state
of this pin to determine its SMBus slave address. The
LM95245 does not latch the state of the A0 pin when it is
functioning as an input. If the OS/A0 pin is not used it must
be externally connected through hardware to some state, as
shown in the table, in order to guarantee that the proper ad-
dress is selected and not in an indeterminate state. The OS/
A0 does not have an internal pull-up.
1.4 DIGITAL FILTER
In order to suppress erroneous remote temperature readings
due to noise, the LM95245 incorporates a digital filter for the
Remote Temperature Channel. The filter is accessed in the
Configuration Register 2, bits D2 (FE1) and D1(FE0). The fil-
ter can be set according to the following table.
FE1
0
0
1
1
FE0
0
1
0
1
Filter Setting
Filter Off
Reserved
Reserved
Filter On
Figure 2
depicts the filter output in response to a step input
and an impulse input.
a) Seventeen and fifty degree step response
b) Impulse response with input transients less than 4°C
c) Impuse response with input transients
greater than 4°C
FIGURE 2. Filter Impulse and Step Response Curves
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM95245CIMMX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95245CIMMX-1 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Precision Remote Diode Digital Temperature Sensor with TruTherm㈢ BJT Beta Compensation Technology for 45nm Process |
| LM95245CIMMX-1/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95245CIMX | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM95245CIMX/NOPB | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)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(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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