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參數(shù)資料
型號: LM82CIMQAX
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 溫度/濕度傳感器
英文描述: Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface
中文描述: DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, RECTANGULAR, SURFACE MOUNT
封裝: QSOP-16
文件頁數(shù): 16/17頁
文件大小: 341K
代理商: LM82CIMQAX
4.0 Application Hints
(Continued)
6.
Avoid running diode traces close to or parallel to high
speed digital and bus lines. Diode traces should be kept
at least 2cm. apart from the high speed digital traces.
If it is necessary to cross high speed digital traces, the
diode traces and the high speed digital traces should
cross at a 90 degree angle.
The ideal place to connect the LM82’s GND pin is as
close as possible to the Processors GND associated
with the sense diode.
Leakage current between D+ and GND should be kept
to a minimum. One nano-ampere of leakage can cause
as much as 1C of error in the diode temperature read-
ing. Keeping the printed circuit board as clean as pos-
sible will minimize leakage current.
7.
8.
9.
Noise coupling into the digital lines greater than 300mVp-p
(typical hysteresis), overshoot greater than 500mV above
V
CC
, and undershoot less than 500mV below GND, may pre-
vent successful SMBus communication with the LM82. SM-
Bus no acknowledge is the most common symptom, causing
unnecessary traffic on the bus. Although, the SMBus maxi-
mum frequency of communication is rather low (100kHz
max) care still needs to be taken to ensure proper termina-
tion within a system with multiple parts on the bus and long
printed circuit board traces. An R/C lowpass filter with a 3db
corner frequency of about 40MHz has been included on the
LM82’s SMBCLK input. Additional resistance can be added
in series with the SMBData and SMBCLK lines to further
help filter noise and ringing. Minimize noise coupling by
keeping digital traces out of switching power supply areas as
well as ensuring that digital lines containing high speed data
communications cross at right angles to the SMBData and
SMBCLK lines.
DS101297-17
FIGURE 10. Ideal Diode Trace Layout
L
www.national.com
16
相關(guān)PDF資料
PDF描述
LM82CIMQA Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM82CIMQAX/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
LM83 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Triple-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface
LM8300 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout
LM8300HLQ9 功能描述:IC TOUCHSCREEN CONTROLLER 44LLP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標準包裝:96 系列:- 類型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率(位):- 評估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS,BPS):- 電壓基準:- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
LM8300HMT9 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout
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