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參數(shù)資料
| 型號： | LM95213CISDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 2-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface and TCRIT Outputs |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 11BIT(s), 2Cel, SQUARE, SURFACE MOUNT |
| 封裝： | LLP-14 |
| 文件頁數(shù)： | 12/34頁 |
| 文件大?。?/td> | 415K |
| 代理商： | LM95213CISDX |
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Temperature
Digital Output
Binary
1110 0111 0000 0000
1100 1001 0000 0000
Hex
E700h
C900h
25°C
55°C
11-bit, unsigned binary
Temperature
Digital Output
Binary
1111 1111 1110 0000
1111 1111 0000 0000
1100 1001 0000 0000
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0010 0000
0000 0000 0000 0000
Hex
FFE0h
FF00h
C900h
7D00h
1900h
0100h
0020h
0000h
+255.875°C
+255°C
+201°C
+125°C
+25°C
+1°C
+0.125°C
0°C
When the digital filter is enabled on Remote 1 and 2 channels
temperature data is represented by a 13-bit unsigned binary
or 12-bit plus sign (two's complement) word with an LSb equal
to 0.03125°C.
13-bit, 2's complement (12-bit plus sign)
Temperature
Digital Output
Binary
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0000 1000
0000 0000 0000 0000
1111 1111 1111 1000
1111 1111 0000 0000
1110 0111 0000 0000
1100 1001 0000 0000
Hex
7D00h
1900h
0100h
0008h
0000h
FFF8h
FF00h
E700h
C900h
+125°C
+25°C
+1°C
+0.03125°C
0°C
0.03125°C
1°C
25°C
55°C
13-bit, unsigned binary
Temperature
Digital Output
Binary
1111 1111 1110 0000
1111 1111 0000 0000
1100 1001 0000 0000
0111 1101 0000 0000
0001 1001 0000 0000
0000 0001 0000 0000
0000 0000 0000 1000
0000 0000 0000 0000
Hex
FFE0h
FF00h
C900h
7D00h
1900h
0100h
0008h
0000h
+255.875°C
+255°C
+201°C
+125°C
+25°C
+1°C
+0.03125°C
0°C
Local Temperature data is only represented by an 11-bit,
two's complement, word with an LSb equal to 0.125°C.
11-bit, 2's complement (10-bit plus sign)
Temperature
Digital Output
Binary
0111 1101 0000 0000
0001 1001 0000 0000
Hex
7D00h
1900h
+125°C
+25°C
Temperature
Digital Output
Binary
0000 0001 0000 0000
0000 0000 0010 0000
0000 0000 0000 0000
1111 1111 1110 0000
1111 1111 0000 0000
1110 0111 0000 0000
1100 1001 0000 0000
Hex
0100h
0020h
0000h
FFE0h
FF00h
E700h
C900h
+1°C
+0.125°C
0°C
0.125°C
1°C
25°C
55°C
1.7 SMBDAT OPEN-DRAIN OUTPUT
The SMBDAT output is an open-drain output and does not
have internal pull-ups. A “high” level will not be observed on
this pin until pull-up current is provided by some external
source, typically a pull-up resistor. Choice of resistor value
depends on many system factors but, in general, the pull-up
resistor should be as large as possible without effecting the
SMBus desired data rate. This will minimize any internal tem-
perature reading errors due to internal heating of the
LM95213. The maximum resistance of the pull-up to provide
a 2.1V high level, based on LM95213 specification for High
Level Output Current with the supply voltage at 3.0V, is 82
k
Ω (
5%) or 88.7 k
Ω (1%).
1.8 TCRIT1, TCRIT2, AND TCRIT3 OUTPUTS
The LM95213's TCRIT pins are active-low open-drain outputs
and do not include internal pull-up resistors. A “high” level will
not be observed on these pins until pull-up current is provided
by some external source, typically a pull-up resistor. Choice
of resistor value depends on many system factors but, in gen-
eral, the pull-up resistor should be as large as possible without
effecting the performance of the device receiving the signal.
This will minimize any internal temperature reading errors due
to internal heating of the LM95213. The maximum resistance
of the pull-up to provide a 2.1V high level, based on LM95213
specification for High Level Output Current with the supply
voltage at 3.0V, is 82 k
Ω (
5%) or 88.7 k
Ω (
1%). The three
TCRIT pins can each sink 6 mA of current and still guarantee
a "Logic Low" output voltage of 0.4V. If all three pins are set
at maximum current this will cause a power dissipation of 7.2
mW. This power dissipation combined with a thermal resis-
tance of 77.8°C/W will cause the LM95213's junction temper-
ature to rise approximately 0.6°C and thus cause the Local
temperature reading to shift. This can only be cancelled out if
the environment that the LM95213 is enclosed in has stable
and controlled air flow over the LM95213, as airflow can
cause the thermal resistance to change dramatically.
1.9 TCRIT LIMITS AND TCRIT OUTPUTS
Figure 4
describes a simplified diagram of the temperature
comparison and status register logic.
Figure 5
describes a
simplified logic diagram of the circuitry associated with the
status registers, mask registers and the TCRIT output pins.
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM95213CISDX/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 |
| LM95213EB/NOPB | 功能描述:溫度傳感器開發(fā)工具 LM95213EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:Temperature Sensors and Control ICs 工具用于評估:MSP430G2553 接口類型:USB 工作電源電壓: 工作電源電流: |
| LM95214 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Quad Remote Diode and Local Temperature Sensor with SMBus Interface |
| LM95214CISD | 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 |
| LM95214CISD/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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