參數(shù)資料
型號(hào)： LTC1967IMS8#TRPBF
廠商： Linear Technology
文件頁數(shù)： 17/28頁
文件大?。?/td> 327K
描述： IC CONVERTER RMS-DC PREC 8MSOP
標(biāo)準(zhǔn)包裝： 2,500
電流 - 電源： 320µA
電源電壓： 4.5 V ~ 5.5 V
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 帶卷 (TR)
17
LTC1967
1967f
APPLICATIO S I FOR ATIO
U
U
U
Figures 18 and 19 show the settling time versus settling
accuracy for the Buffered and DC accurate post filters,
respectively. The different curves represent different
scalings of the filters, as indicated by the C
AVE
 value. These
are comparable to the curves in Figure 11 (single capacitor
case), with somewhat less settling time for the buffered
post filter, and somewhat more settling time for the
DC-accurate post filter. These differences are due to the
change in overall bandwidth as mentioned earlier.
Although the settling times for the post-filtered configura-
tions shown on Figures 18 and 19 are not that much
different from those with a single capacitor, the point of
using a post filter is that the settling times are far better for
a given level peak error. The filters dramatically reduce the
low frequency averaging ripple with far less impact on
settling time.
Crest Factor and AC + DC Waveforms
In the preceding discussion, the waveform was assumed
to be AC coupled, with a modest crest factor. Both
assumptions ease the requirements for the averaging
capacitor. With an AC-coupled sine wave, the calculation
engine squares the input, so the averaging filter that
follows is required to filter twice the input frequency,
making its job easier. But with a sinewave that includes
DC offset, the square of the input has frequency content
at the input frequency and the filter must average out that
lower frequency. So with AC + DC waveforms, the re-
quired value for C
AVE
 should be based on half of the lowest
input frequency, using the same design curves presented
in Figures 6, 8, 16 and 17.
Figure 17. Peak Error vs Input Frequency with DC-Accurate Post Filter
Figure 16. Peak Error vs Input Frequency with Buffered Post Filter
INPUT FREQUENCY (Hz)
1
2.0
1.6
1.2
0.8
0.4
10
100
1967 F16
0
1.8
1.4
1.0
0.6
0.2
C = 22礔
C = 10礔
C = 4.7礔
C = 2.2礔
C = 1礔
C = 0.47礔
C = 0.22礔
INPUT FREQUENCY (Hz)
1
2.0
1.6
1.2
0.8
0.4
10
100
1967 F17
0
1.8
1.4
1.0
0.6
0.2
C = 10礔
C = 4.7礔
C = 2.2礔
C = 1礔
C = 0.47礔
C = 0.22礔
C = 0.1礔
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1968CMS8 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件
LTC1968CMS8#PBF 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件
LTC1968CMS8#TR 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件
LTC1968CMS8#TRPBF 功能描述:IC CONVERTER RMS-DC PREC 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V，36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC W 包裝:管件
LTC1968CMS8PBF 制造商:Linear Technology 功能描述:RMS-to-DC Converter Prec. 500kHz MSOP8
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