欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號： LTC1968IMS8#TRPBF
廠商： Linear Technology
文件頁數： 19/28頁
文件大小： 296K
描述： IC CONVERTER RMS-DC PREC 8MSOP
標準包裝： 2,500
電流 - 電源： 2.3mA
電源電壓： 5.0V
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應商設備封裝： 8-MSOP
包裝： 帶卷 (TR)
19
LTC1968
1968f
waveform dynamics and the type of filtering used. The
above method is conservative for some cases and about
right for others.
The LTC1968 works well with signals whose crest factor
is 4 or less. At higher crest factors, the internal ?/DIV>
modulator will saturate, and results will vary depending on
the exact frequency, shape and (to a lesser extent) ampli-
tude of the input waveform. The output voltage could be
higher or lower than the actual RMS of the input signal.
The ?modulator may also saturate when signals with
crest factors less than 4 are used with insufficient averag-
ing. This will only occur when the output droops to less
than 1/4 of the input voltage peak. For instance, a DC-
coupled pulse train with a crest factor of 4 has a duty cycle
of 6.25% and a 1V
PEAK
 input is 250mV
RMS
. If this input is
50Hz, repeating every 20ms, and C
AVE
 = 10礔, the output
will droop during the inactive 93.75% of the waveform.
This droop is calculated as:
V
V
e
MIN
RMS
INACTIVETIME
=
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>

?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
2
1
2 " Z  " C
OUT  AVE
For the LTC1968, whose output impedance (Z
OUT
) is
12.5k&, this droop works out to 3.6%, so the output
would be reduced to 241mV at the end of the inactive
portion of the input. When the input signal again climbs to
1V
PEAK
, the peak/output ratio is 4.15.
With C
AVE
 = 100礔, the droop is only 0.37% to 249.1mV
and the peak/output ratio is just 4.015, which the LTC1968
has enough margin to handle without error.
For crest factors less than 3.5, the selection of C
AVE
 as
previously described should be sufficient to avoid this
droop and modulator saturation effect. But with crest
factors above 3.5, the droop should also be checked for
each design.
Error Analyses
Once the RMS-to-DC conversion circuit is working, it is
time to take a step back and do an analysis of the accuracy
of that conversion. The LTC1968 specifications include
three basic static error terms, V
OOS
, V
IOS
 and GAIN. The
output offset is an error that simply adds to (or subtracts
APPLICATIO S I FOR ATIO
U
U
U
from) the voltage at the output. The conversion gain of the
LTC1968 is nominally 1.000 V
DCOUT
/V
RMSIN
 and the gain
error reflects the extent to which this conversion gain is
not perfectly unity. Both of these affect the results in a
fairly obvious way.
Input offset on the other hand, despite its conceptual
simplicity, effects the output in a nonobvious way. As its
name implies, it is a constant error voltage that adds
directly with the input. And it is the sum of the input and
V
IOS
 that is RMS converted.
This means that the effect of V
IOS
 is warped by the
nonlinear RMS conversion. With 0.4mV (typ) V
IOS
, and a
200mV
RMS
 AC input, the RMS calculation will add the DC
and AC terms in an RMS fashion and the effect is
negligible:
V
OUT
= (200mV AC)
2
 + (0.4mV DC)
2
= 200.0004mV
= 200mV + 2ppm
But with 10?less AC input, the error caused by V
IOS
 is
100?larger:
V
OUT
= (20mV AC)
2
 + (0.4mV DC)
2
= 20.004mV
= 20mV + 200ppm
This phenomena, although small, is one source of the
LTC1968s residual nonlinearity.
On the other hand, if the input is DC coupled, the input
offset voltage adds directly. With +200mV and a +0.4mV
V
IOS
, a 200.4mV output will result, an error of 0.2% or
2000ppm. With DC inputs, the error caused by V
IOS
 can be
positive or negative depending if the two have the same or
opposing polarity.
The total conversion error with a sine wave input using the
typical values of the LTC1968 static errors is computed as
follows:
V
OUT
  = ((500mV AC)
2
 + (0.4mV DC)
2
) " 1.001 + 0.2mV
= 500.700mV
= 500mV + 0.140%
V
OUT
  = ((50mV AC)
2
 + (0.4mV DC)
2
) " 1.001 + 0.2mV
= 50.252mV
= 50mV + 0.503%
相關PDF資料
PDF描述
LTC3100EUD#TRPBF IC REG BUCK/BOOST/LINEAR 16-QFN
LTC3104IMSE#TRPBF IC REG DL BCK/LINEAR SYNC 16MSOP
LTC3445EUF#TRPBF IC REG TRPL BUCK/LINEAR 24-QFN
LTC3446IDE#PBF IC REG TRPL BCK/LINEAR 14-DFN
LTC3537EUD#TRPBF IC REG DL BST/LINEAR SYNC 16-QFN
相關代理商/技術參數
參數描述
LTC1980EGN 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR)
LTC1980EGN#PBF 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR)
LTC1980EGN#TR 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR)
LTC1980EGN#TRPBF 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監控器 電池化學:堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:帶卷 (TR)
LTC1981ES5 制造商:Linear Technology 功能描述:MOSFET DRVR 1-OUT Hi Side 5-Pin TSOT-23
發布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發布成功！您可以繼續發布采購。也可以進入我的后臺，查看報價

發布成功！您可以繼續發布采購。也可以進入我的后臺，查看報價

*型號 *數量 廠商 批號 封裝
添加更多采購

我的聯系方式

*
*
*
主站蜘蛛池模板： 高雄市| 青龙| 呼图壁县| 阿坝县| 东光县| 收藏| 恩平市| 昌都县| 泰和县| 安乡县| 郑州市| 磐石市| 清新县| 隆昌县| 辉县市| 高平市| 池州市| 绩溪县| 澄江县| 吴忠市| 绥棱县| 金门县| 黔东| 策勒县| 西贡区| 中超| 福鼎市| 宾阳县| 得荣县| 从江县| 林芝县| 揭东县| 永州市| 恭城| 汶上县| 通许县| 哈密市| 始兴县| 荣成市| 莲花县| 凤山市|