- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377766 > LTC1966 (Linear Technology Corporation) Precision Micropower, SIGMA RMS-to-DC Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1966 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Precision Micropower, SIGMA RMS-to-DC Converter |
| 中文描述： | 精密微，適馬有效值- DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 20/32頁 |
| 文件大?。?/td> | 444K |
| 代理商： | LTC1966 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
20
LTC1966
sn1966 1966fas
APPLICATIOU
W
U
U
Figures 19 and 20 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 12 (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.
The other difference is the settling behavior of the filters
below the 1% level. Unlike the case of a 1st order filter, any
3rd order filter can have overshoot and ringing. The filter
designs presented here have minimal overshoot and
ringing, but are somewhat sensitive to component mis-
matches. Even the
±
12% tolerance of the LTC1966 output
impedance can be enough to cause some ringing. The
dashed lines indicate what can happen when
±
5% capaci-
tors and
±
1% resistors are used.
Although the settling times for the post-filtered configura-
tions shown on Figures 19 and 20 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
INPUT FREQUENCY (Hz)
1
–2.0
P
–1.6
–1.2
–0.8
–0.4
10
100
1966 F18
0
–1.8
–1.4
–1.0
–0.6
–0.2
C = 10
μ
F
C = 4.7
μ
F
C = 2.2
μ
F
C = 1.0
μ
F
C = 0.47
μ
F
C = 0.22
μ
F
C = 0.1
μ
F
Figure 18. Peak Error vs Input Frequency with DC-Accurate Post Filter
INPUT FREQUENCY (Hz)
1
–2.0
P
–1.6
–1.2
–0.8
–0.4
10
100
1966 F17
0
–1.8
–1.4
–1.0
–0.6
–0.2
C = 10
μ
F
C = 4.7
μ
F
C = 2.2
μ
F
C = 1.0
μ
F
C = 0.47
μ
F
C = 0.22
μ
F
C = 0.1
μ
F
Figure 17. Peak Error vs Input Frequency with Buffered Post Filter
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1966CMS8 | Precision Micropower, SIGMA RMS-to-DC Converter |
| LTC1967 | Precision Extended Bandwidth, RMS-to-DC Converter |
| LTC1967CMS8 | Precision Extended Bandwidth, RMS-to-DC Converter |
| LTC1967IMS8 | Precision Extended Bandwidth, RMS-to-DC Converter |
| LTTJ | Precision Extended Bandwidth, RMS-to-DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1966CMS8 | 功能描述:IC PREC RMS/DC CONV MCRPWR 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 |
| LTC1966CMS8#PBF | 功能描述:IC PREC RMS/DC CONV MCRPWR 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 |
| LTC1966CMS8#TR | 功能描述:IC PREC RMS/DC CONV MCRPWR 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 |
| LTC1966CMS8#TRPBF | 功能描述:IC PREC RMS/DC CONV MCRPWR 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 |
| LTC1966CMS8PBF | 制造商:Linear Technology 功能描述:RMS-to-DC Converter Prec. uPower MSOP8 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。