參數(shù)資料
型號(hào)： AD9779ABSVZRL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 32/56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
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 38 of 56
Table 21. Inverse Sinc Filter
As shown in Table 20, the mixing functions of most of the
modes result in cross-coupling of samples between the I and Q
channels. The I and Q channels only operate independently
with the fS/2 mode. This means that real modulation using both
the I and Q DAC outputs can only be done in the fS/2 mode. All
other modulation modes require complex input data and
produce complex output signals.
Lower Coefficient
Upper Coefficient
Integer Value
H(1)
H(9)
+2
H(2)
H(8)
4
H(3)
H(7)
+10
H(4)
H(6)
35
H(5)
N/A
+401
Table 20. Modulation Mixing Sequences
Modulation
The inverse sinc filter is disabled by default. It can be enabled by
setting the inverse sinc enable bit (Bit 3) in Register 0x02.
Mixing Sequence
fDAC/2
I = I, I, I, I, …
0
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
0
0.05 0.10 0.15
0.20 0.25 0.30 0.35
0.40
0.45 0.50
f/fSAMPLE
(d
B
)
06
45
2-
08
8
SINC–1 RESPONSE
COMBINED SINC AND SINC–1 RESPONSE
Q = Q, Q, Q, Q, …
fDAC/4
I = I, Q, I, Q, …
Q = Q, I, Q, I, …
fDAC/4
I = I, Q, I, Q, …
Q = Q, I, Q, I, …
fDAC/8
I = I, r(I + Q), Q, r(I + Q), I, r(I + Q), Q, r(I Q),
…
Q = Q, r(Q I), I, r(Q + I), Q, r(Q + I), I, r(Q + I),
…
where r = √2/2
INVERSE SINC FILTER
The inverse sinc filter is implemented as a nine-tap FIR filter. It
is designed to provide less than ±0.05 dB pass-band ripple up to
a frequency of 0.4 × fDATA. To provide the necessary gain at the
upper end of the pass band, the inverse sinc filter has an intrinsic
insertion loss of 3.4 dB. The transfer function is shown in
Figure 71 and the tap coefficients are given in Table 21.
Figure 71. Transfer Function of Inverse Sinc Filter with the DAC sin(x)/x Output
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AD9779A-DPG2-EBZ 功能描述:BOARD EVALUATION FOR AD9779A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 數(shù)模轉(zhuǎn)換器 (DAC) 系列:* 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- DAC 的數(shù)量:4 位數(shù):12 采樣率（每秒）:- 數(shù)據(jù)接口:串行，SPI? 設(shè)置時(shí)間:3µs DAC 型:電流/電壓 工作溫度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581
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AD9779BSV 制造商:Analog Devices 功能描述:DAC 2CH INTERPOLATION FLTR 16BIT 100TQFP EP - Bulk
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