- 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(hào)： | 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(zhǔn)確，高溫，遠(yuǎn)程二極管溫度傳感器，兩線接口 |
| 文件頁(yè)數(shù)： | 9/20頁(yè) |
| 文件大小： | 349K |
| 代理商： | LM99CIMMX |
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)第18頁(yè)第19頁(yè)第20頁(yè)
1.0 Functional Description
(Continued)
1.
2.
Master Senses SMBus alert line low
Master sends a START followed by the Alert Response
Address (ARA) with a Read Command.
Alerting Device(s) send ACK.
Alerting Device(s) send theirAddress. While transmitting
their address, alerting devices sense whether their ad-
dress has been transmitted correctly. (The LM99 will
reset its ALERT output and set theALERT mask bit once
its complete address has been transmitted successfully.)
Master/slave NoACK
Master sends STOP
Master attends to conditions that caused the ALERT to
be triggered. The STATUS REGISTER is read and fan
started, setpoint limits adjusted, etc.
Master resets the ALERT mask (D7 in the Configuration
register).
The ARA, 000 1100, is a general call address. No device
should ever be assigned this address.
Bit D0 (the ALERT configure bit) in the FILTER and ALERT
CONFIGURE REGISTER (xBF) must be set low in order for
the LM99 to respond to the ARA command.
The ALERT output can be disabled by setting the ALERT
mask bit, D7, of the Configuration register. The power on
default is to have the ALERT mask bit and the ALERT
configure bit low.
3.
4.
5.
6.
7.
8.
1.3 T_CRIT_A OUTPUT and T_CRIT LIMIT
T_CRIT_A is activated when any temperature reading is
greater than the limit preset in the critical temperature set-
point register (T_CRIT), as shown in
Figure 6
. The Status
Register can be read to determine which event caused the
alarm. A bit in the Status Register is set high to indicate
which temperature reading exceeded the T_CRIT setpoint
temperature and caused the alarm, see Section 2.3.
Local and remote temperature diodes are sampled in se-
quence by the A/D converter. The T_CRIT_A output and the
Status Register flags are updated after every Local and
Remote temperature conversion. T_CRIT_A follows the
state of the comparison, it is reset when the temperature falls
below the setpoint RCS-TH. The Status Register flags are
reset only after the Status Register is read and if a tempera-
ture conversion(s) is/are below the T_CRIT setpoint, as
shown in
Figure 6
.
1.4 POWER ON RESET DEFAULT STATES
LM99 always powers up to these known default states. The
LM99 remains in these states until after the first conversion.
1.
Command Register set to 00h
2.
Local Temperature set to 0C
3.
Remote Diode Temperature set to 0C until the end of
the first conversion.
4.
Status Register set to 00h.
5.
Configuration register set to 00h; ALERT enabled, Re-
mote T_CRIT alarm enabled and Local T_CRIT alarm
enabled
6.
85C Local T_CRIT temperature setpoint
7.
110C Remote T_CRIT temperature setpoint (126C Re-
mote diode junction temperature)
8.
70C Local and Remote HIGH temperature setpoints
9.
0C Local and Remote LOW temperature setpoints
10. Filter and Alert Configure Register set to 00h; filter dis-
abled, ALERT output set as an SMBus ALERT
11. Conversion Rate Register set to 8h; conversion rate set
to 16 conv./sec.
1.5 SMBus INTERFACE
The LM99 operates as a slave on the SMBus, so the
SMBCLK line is an input and the SMBData line is bi-
directional. The LM99 never drives the SMBCLK line and it
does not support clock stretching. According to SMBus
specifications, the LM99 has a 7-bit slave address.All bitsA6
through A0 are internally programmed and can not be
changed by software or hardware. The LM99 and LM99-1
have the following slave addresses:
Version
LM99
LM99-1
A6
1
1
A5
0
0
A4
0
0
A3
1
1
A2
1
1
A1
0
0
A0
0
1
1.6 TEMPERATURE DATA FORMAT
Temperature data can only be read from the Local and
Remote
Temperature
registers;
(T_CRIT, LOW, HIGH) are read/write.
the
setpoint
registers
20053829
FIGURE 5. ALERT Output as an SMBus ALERT
Temperature Response Diagram
20053806
FIGURE 6. T_CRIT_A Temperature Response Diagram
L
www.national.com
9
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(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 |
| LM99EVAL | 功能描述:BOARD EVALUATION LM99 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 傳感器 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| LM99EVAL/NOPB | 功能描述:溫度傳感器開(kāi)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(píng)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(hù):IP67 安裝類型:基座 高度（最大值）:1.437"（36.50mm） 應(yīng)用:- 標(biāo)準(zhǔn)包裝:1 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。