參數(shù)資料
型號: AD9267BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 15/24頁
文件大?。?/td> 0K
描述: IC MOD SIGMA-DELTA DUAL 64LFCSP
標(biāo)準(zhǔn)包裝: 1
類型: 三角積分調(diào)制器
應(yīng)用: 無線通信系統(tǒng)
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 64-LFCSP-VQ(9x9)
包裝: 托盤
AD9267
Rev. 0 | Page 22 of 24
Referring to Figure 46, the 3 dB cutoff frequency of the low-
pass Chebyshev II filter response resides at 15.75 MHz, and at
10 MHz, there is 0.43 dB of attenuation due to the sharp roll-off
of the filter. Table 15 summarizes the components and
manufacturers used to build the circuit.
Table 15. Chebyshev II Filter Components
Parameter
Value
Unit
Manufacturer
C1
39
pF
Murata GRM188 series, 0603
L1
180
nH
Coil Craft 0402AF, 2%
C2
390
pF
Murata GRM188 series, 0603
C3
220
pF
Murata GRM188 series, 0603
–20
0
2
4
6
8
1012
14161820
–18
–16
–14
–12
–10
–8
–6
–4
–2
0
–60
–50
–40
–30
–20
–10
0
10
20
30
40
GR
OU
P
D
E
L
A
Y
(
n
s
)
FREQUENCY (MHz)
AM
P
L
IT
UDE
(
d
B)
07
773
-05
0
Figure 46. Low-Pass Chebyshev II Filter Response
In addition to matching the profile of Figure 44, group delay
and channel matching are important filter design criteria. Low
tolerance components are highly recommended for improved
channel matching, which translates to minimal degradation in
image rejection for quadrature systems.
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