參數(shù)資料
型號(hào): LTC1264-7CSW#TRPBF
廠商: Linear Technology
文件頁(yè)數(shù): 11/16頁(yè)
文件大?。?/td> 0K
描述: IC FILTER 8TH ORDR LOWPASS16SOIC
標(biāo)準(zhǔn)包裝: 1,000
濾波器類型: 線性相位,低通開關(guān)電容器
頻率 - 截止或中心: 200kHz
濾波器數(shù): 1
濾波器階數(shù): 8th
電源電壓: ±2.37 V ~ 8 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
包裝: 帶卷 (TR)
LTC1264-7
12647fa
4
ELECTRICAL C
C
HARA TERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Input frequencies, f, are linearly phase shifted through the filter as
long as f
≤ fC; fC = cutoff frequency.
Figure 1 curve (A) shows the typical phase response of an LTC1264-7
operating at fCLK = 2.5MHz, fC = 100kHz. An endpoint straight line, curve
(B), depicts the ideal linear phase response of the filter. It is described by:
phase shift = 180
° – F (f/fC); f ≤ fC.
F is arbitrarily called the “phase factor” expressed in degrees. The phase
factor together with the specified deviation from the ideal straight line
allows the calculation of the phase at a given frequency. Note, the
maximum phase nonlinearity, Figure 1, occurs at the vicinity of f = 0.25 fC
and = 0.75 fC. Example: The phase shift at 70kHz of the LTC1264-7 shown
in Figure 1 is: phase shift = 180
° – 407° (70kHz/100kHz) ± nonlinearity =
–104.9
° ± 1% or –104.9°± 1.05°.
Note 3: Group delay and group delay deviation are calculated from the
measured phase factor and phase deviation specifications.
Note 4: The filter cutoff frequency is abbreviated as fCUTOFF or fC.
Note 5: The AC swing is typically 9VP-P, 5.6VP-P, 1.8VP-P with ±7.5V, ±5V,
±2.5V supply respectively. For more information refer to the THD + Noise
vs Input graphs.
Figure 1. Phase Response in the Passband (Note 2)
FREQUENCY (kHz)
0
–360
PHASE
(DEG)
–270
–180
–90
0
90
180
20
40
60
80
LTC1264-7 F01
100
10
30
50
70
90
A
B
fCLK = 2.5MHz
(fCLK/fC) = 25:1
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