- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358878 > LM99CIMMX (National Semiconductor Corporation) 【1C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-Wire Interface PDF資料下載
參數(shù)資料
| 型號： | LM99CIMMX |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | 【1C Accurate, High Temperature, Remote Diode Temperature Sensor with Two-Wire Interface |
| 中文描述： | 【集成電路準確，高溫，遠程二極管溫度傳感器，兩線接口 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 349K |
| 代理商： | LM99CIMMX |
1.0 Functional Description
(Continued)
Remote temperature data is represented by an 11-bit, two’s
complement word with an LSB (Least Significant Bit) equal
to 0.125C. The data format is a left justified 16-bit word
available in two 8-bit registers:
Actual vs. LM99 Remote Temperature Conversion
Actual Remote Diode
Temperature,C
LM99 Remote Diode
Temperature Register, C
Binary Results in LM99
Remote Temperature Register
Hex Remote
Temperature
Register
6800h
6D00h
7100h
7200h
7700h
7200h
120
125
126
130
135
140
+104
+109
+110
+114
+119
+124
0110 1000 0000 0000
0110 1101 0000 0000
0110 1110 0000 0000
0111 0010 0010 0000
0111 0111 0000 0000
0111 1100 0000 0000
Output is 11-bit two’s complement word. LSB = 0.125 C.
Actual vs. Remote T_Crit Setpoint
Actual Remote Diode
T_Crit Setpoint,C
Factory-Programmed
Remote T_CRIT High
Setpoint, C
+110
Binary Remote T_CRIT High
Setpoint Value
Hex Remote T_CRIT
High Setpoint Value
126
0110 1110
71h
Local Temperature data is represented by an 8-bit, two’s
complement byte with an LSB (Least Significant Bit)
equal to 1C:
Local
Temperature
Digital Output
Binary
0111 1101
0001 1001
0000 0001
0000 0000
1111 1111
1110 0111
1100 1001
Hex
7Dh
19h
01h
00h
FFh
E7h
C9h
+125C
+25C
+1C
0C
1C
25C
55C
1.7 OPEN-DRAIN OUTPUTS
The SMBData, ALERT 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 by some external source, typically a pull-up resis-
tor. Choice of resistor value depends on many system fac-
tors but, in general, the pull-up resistor should be as large as
possible. This will minimize any internal temperature reading
errors due to internal heating of the LM99. The maximum
resistance of the pull-up to provide a 2.1V high level, based
on LM99 specification for High Level Output Current with the
supply voltage at 3.0V, is 82 k
(5%) or 88.7 k
(1%).
1.8 DIODE FAULT DETECTION
The LM99 is equipped with operational circuitry designed to
detect fault conditions concerning the remote diode. In the
event that the D+ pin is detected as shorted to V
or
floating, the Remote Temperature High Byte (RTHB) register
is loaded with +127C, the Remote Temperature Low Byte
(RTLB) register is loaded with 0, and the OPEN bit (D2) in
the status register is set. As a result, if the Remote T_CRIT
setpoint register (RCS) is set to a value less than +127C the
ALERT and T_Crit output pins will be pulled low, if the Alert
Mask and T_Crit Mask are disabled. If the Remote HIGH
Setpoint High Byte Register (RHSHB) is set to a value less
than +127C then ALERT will be pulled low, if the Alert Mask
is disabled. The OPEN bit itself will not trigger and ALERT.
In the event that the D+ pin is shorted to ground or D, the
Remote Temperature High Byte (RTHB) register is loaded
with 128C (1000 0000) and the OPEN bit (D2) in the status
register will not be set. Since operating the LM99 at 128C
is beyond it’s operational limits, this temperature reading
represents this shorted fault condition. If the value in the
Remote Low Setpoint High Byte Register (RLSHB) is more
than 128C and the Alert Mask is disabled, ALERT will be
pulled low.
Remote diode temperature sensors that have been previ-
ously released and are competitive with the LM99 output a
code of 0C if the external diode is short-circuited. This
change is an improvement that allows a reading of 0C to be
truly interpreted as a genuine 0C reading and not a fault
condition.
L
www.national.com
10
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM9V381 | Color STN-LCD Module |
| LMC-S1D16 | 16 Characters X 1Lines LCD Mode |
| LMC6001AIH | JT 11C 11#16 PIN PLUG |
| LMC6001CIN | Ultra Ultra-Low Input Current Amplifier |
| LMC6001BIN | Ultra Ultra-Low Input Current Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM99CIMMX/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: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| LM99EVAL | 功能描述:BOARD EVALUATION LM99 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 傳感器 系列:PowerWise® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| LM99EVAL/NOPB | 功能描述:溫度傳感器開發(fā)工具 LM99 EVAL 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: |
| LM9V381 | 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:Color STN-LCD Module |
| LMA100.A.BI.001 | 功能描述:829MHz, 1.9GHz, 2.6GHz Panel RF Antenna 698MHz ~ 960MHz, 1.71GHz ~ 2.17GHz, 2.5GHz ~ 2.7GHz 5.1dBi Connector, SMA Male Base Mount 制造商:taoglas limited 系列:- 包裝:散裝 零件狀態(tài):有效 頻率組:寬帶 頻率（中心/帶）:829MHz，1.9GHz，2.6GHz 頻率范圍:698MHz ~ 960MHz，1.71GHz ~ 2.17GHz，2.5GHz ~ 2.7GHz 天線類型:面板 頻帶數(shù):3 VSWR:- 回波損耗:- 增益:5.1dBi 功率 - 最大值:- 特性:- 端接:連接器，SMA 公型 侵入防護:IP67 安裝類型:基座 高度（最大值）:1.437"（36.50mm） 應(yīng)用:- 標準包裝:1 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。