參數(shù)資料
型號： AD9146BCPZ
廠商： Analog Devices Inc
文件頁數(shù)： 27/56頁
文件大?。?/td> 0K
描述： IC DAC 16BIT SRL DUAL 48LFCSP
標準包裝： 1
系列： TxDAC+®
設(shè)置時間： 20ns
位數(shù)： 16
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-WFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 48-LFCSP-WQ（7x7）
包裝： 托盤
輸出數(shù)目和類型： 2 電流，單極
采樣率（每秒）： 1.23G
Data Sheet
AD9146
Rev. A | Page 33 of 56
Figure 41 shows the pass-band filter response for HB1. In most
applications, the usable bandwidth of the filter is limited by the
image suppression provided by the stop-band rejection and not
by the pass-band flatness. Table 16 shows the pass-band flatness
and the stop-band rejection supported by the HB1 filter at dif-
ferent bandwidths.
0.02
–0.10
–0.08
–0.06
–0.04
–0.02
0
0.40
0.36
0.32
0.28
0.24
0.20
0.16
0.12
0.08
0.04
M
AG
NI
T
UDE
(
d
B)
FREQUENCY (×
fIN1) (Hz)
09691-
046
Figure 41. Pass-Band Detail of HB1
Table 16. HB1 Pass-Band and Stop-Band Performance by
Bandwidth
Bandwidth (% of fIN1)
Pass-Band
Flatness (dB)
Stop-Band
Rejection (dB)
80
0.001
85
80.4
0.0012
80
81.2
0.0033
70
82
0.0076
60
83.6
0.0271
50
85.6
0.1096
40
Half-Band Filter 2 (HB2)
HB2 has eight modes of operation, as shown in Figure 42 and
Figure 43. The shape of the filter response is identical in each
of the eight modes. The eight modes are distinguished by two
factors: the filter center frequency and whether the input signal
is modulated by the filter.
0
–20
–40
–60
–80
–100
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
MODE 0
MODE 2
MODE 6
MODE 4
09691-
047
M
AG
NI
T
UDE
(
d
B)
FREQUENCY (×
fIN2) (Hz)
Figure 42. HB2, Even Filter Modes
0
–20
–40
–60
–80
–100
0
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
MODE 1
MODE 3
MODE 7
MODE 5
09691-
048
M
AG
NI
T
UDE
(
d
B)
FREQUENCY (×
fIN2) (Hz)
Figure 43. HB2, Odd Filter Modes
As shown in Figure 42 and Figure 43, the center frequency in
each mode is offset by one-fourth the input data rate (fIN2) of
the filter. Mode 0 through Mode 3 do not modulate the input
signal. Mode 4 through Mode 7 modulate the input signal by
fIN2. When operating in Mode 0 and Mode 4, the I and Q paths
operate independently and no mixing of the data between chan-
nels occurs. When operating in the other six modes, mixing of
the data between the I and Q paths occurs; therefore, the data
input to the filter is assumed to be complex. Table 17 summarizes
the HB2 modes.
Table 17. HB2 Filter Modes
Mode
fCENTER
fMOD
Input Data
0
DC
None
Real or complex
1
fIN/4
None
Complex
2
fIN/2
None
Complex
3
3fIN/4
None
Complex
4
fIN
Real or complex
5
5fIN/4
fIN
Complex
6
3fIN/2
fIN
Complex
7
7fIN/4
fIN
Complex
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