- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358873 > LM77CIMM-5 (National Semiconductor Corporation) 9-Bit Sign Digital Temperature Sensor and Thermal Window Comparator with Two-Wire Interface PDF資料下載
參數(shù)資料
| 型號(hào)： | LM77CIMM-5 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 9-Bit Sign Digital Temperature Sensor and Thermal Window Comparator with Two-Wire Interface |
| 中文描述： | 9位注冊(cè)數(shù)字溫度傳感器和熱窗口比較器的兩線接口 |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大小： | 373K |
| 代理商： | LM77CIMM-5 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)
1.0 Functional Description
(Continued)
1.4 TEMPERATURE DATA FORMAT
Temperature data can be read from the Temperature and Set
Point registers; and written to the Set Point registers. Tem-
perature data can be read at any time, although reading
faster than the conversion time of the LM77 will prevent data
from being updated. Temperature data is represented by a
10-bit, two’s complement word with an LSB (Least Signifi-
cant Bit) equal to 0.5C:
Temperature
Digital Output
Binary
01 0000 0100
00 1111 1010
00 0011 0010
00 0000 0001
00 0000 0000
11 1111 1111
11 1100 1110
11 1001 0010
Hex
104h
0FAh
032h
001h
000h
3FFh
3CEh
392h
+130C
+125C
+25C
+0.5C
0C
0.5C
25C
55C
1.5 SHUTDOWN MODE
Shutdown mode is enabled by setting the shutdown bit in the
Configuration register via the Serial Bus. Shutdown mode
reduces power supply current to 5 μA typical. T_CRIT_A is
reset if previously set. Since conversions are stoped during
shutdown, T_CRIT_A and INT will not be operational. The
Serial Bus interface remains active. Activity on the clock and
data lines of the Serial Bus may slightly increase shutdown
mode quiescent current. Registers can be read from and
written to in shutdown mode. The LM77 takes miliseconds to
respond to the shutdown command.
1.6 INT AND T_CRIT_A OUTPUT
The INT and T_CRIT_A outputs are open-drain outputs and
do not have internal pull-ups. A
″
high
″
level will not be
observed on these pins until pull-up current is provided from
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. This
will minimize any errors due to internal heating of the LM77.
The maximum resistance of the pull up, based on LM77
specification for High Level Output Current, to provide a 2
volt high level, is 30K ohms.
1.7 FAULT QUEUE
A fault queue of up to 4 faults is provided to prevent false
tripping when the LM77 is used in noisy environments. The 4
faults must occur consecutively to set flags as well as INT
and T_CRIT_A outputs. The fault queue is enabled by set-
ting bit 4 of the Configuration Register high (see Section
1.11).
DS100136-6
Note:
Event Interrupt mode is drawn as if the user is reading the part. If the user doesn’t read, the outputs would go low and stay that way until the LM77 is read.
FIGURE 3. Temperature Response Diagram
L
www.national.com
9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM7800C | Series 3-Terminal Positive Regulators |
| LM7805 | 1.5A Positive Voltage Regulator |
| LM7805ECT | 3-Terminal 1A positive voltage regulators |
| LM7805 | 3-terminal 1A positive volitage regulator |
| LM7805A | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM77CIMM-5/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 |
| LM77CIMMX-3 | 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 |
| LM77CIMMX-3/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 |
| LM77CIMMX-5 | 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 |
| LM77CIMMX-5/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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。