fOUT (× Input Data Rate)
參數(shù)資料
型號(hào)： AD9779ABSVZRL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 28/56頁(yè)
文件大?。?/td> 0K
描述： DAC 16BIT 1.0GSPS 100-TQFP
產(chǎn)品培訓(xùn)模塊： Data Converter Fundamentals
DAC Architectures
設(shè)計(jì)資源： Interfacing ADL5370 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0016)
Interfacing ADL5371 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0017)
Interfacing ADL5372 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0018)
Interfacing ADL5373 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0019)
Interfacing ADL5374 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0020)
Interfacing ADL5375 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0021)
標(biāo)準(zhǔn)包裝： 1,000
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
功率耗散（最大）： 300mW
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 100-TQFP 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 100-TQFP-EP（14x14）
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 4 電流，單極
采樣率（每秒）： 1G
AD9776A/AD9778A/AD9779A
Rev. B | Page 34 of 56
10
–100
–4
4
fOUT (× Input Data Rate)
AT
T
E
N
UAT
IO
N
(
d
B
)
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
45
2-
0
55
Figure 58. 4× Interpolation, Low-Pass Response to ±4× Input Data Rate
(Dotted Lines Indicate 1 dB Roll-Off)
10
–100
–4
4
fOUT (× Input Data Rate)
AT
T
E
N
UAT
IO
N
(
d
B
)
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
06
45
2-
0
56
Figure 59. 8× Interpolation, Low-Pass Response to ±4× Input Data Rate
(Dotted Lines Indicate 1 dB Roll-Off)
With the interpolation filter and modulator combined, the
incoming signal can be placed anywhere within the Nyquist
region of the DAC output sample rate. When the input signal
is complex, this architecture allows modulation of the input
signal to positive or negative Nyquist regions (see Table 19).
The Nyquist regions of up to 4× the input data rate can be seen
–4
–8
–3×
–6
–2×
–4
–1×
–2
DC
1
1×
3
2×
5
3×
7
–7
–5
–3
–12
4
6
4×
08
06
45
2-
08
6
Figure 60. Nyquist Zones
Figure 57, Figure 58, and Figure 59 show the low-pass response
of the digital filters with no modulation. By turning on the modu-
lation feature, the response of the digital filters can be tuned to
anywhere within the DAC bandwidth. As an example, Figure 61
to Figure 67 show the nonshifted mode filter responses for 8×
interpolation (refer to Table 19 for shifted/nonshifted mode
filter responses).
10
–100
–4
4
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
fOUT (× Input Data Rate)
AT
T
E
N
UAT
IO
N
(
d
B
)
06
45
2-
0
58
Figure 61. Interpolation/Modulation Combination of 4fDAC/8 Filter
10
–100
–4
4
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
fOUT (× Input Data Rate)
AT
T
E
N
UAT
IO
N
(
d
B
)
06
45
2-
0
59
Figure 62. Interpolation/Modulation Combination of 3fDAC/8 Filter
10
–100
–4
4
–3
–2
–1
0123
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
fOUT (× Input Data Rate)
AT
T
E
N
UAT
IO
N
(
d
B
)
06
45
2-
0
60
Figure 63. Interpolation/Modulation Combination of 2fDAC/8 Filter
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