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參數(shù)資料
| 型號： | AD9777BSV |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 16-Bit, 160 MSPS 2X/4X/8X Interpolating Dual TxDAC+ D/A Converter |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 0.011 us SETTLING TIME, DAC WITH PROGRAMMABLE PLL, PQFP80 |
| 封裝： | MO-026ADD-HD, TQFP-80 |
| 文件頁數(shù)： | 27/48頁 |
| 文件大?。?/td> | 6021K |
| 代理商： | AD9777BSV |
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REV. 0
AD9777
–27–
MODULATION, INTERPOLATION = 2
×
With Control Register 01h, Bits 7 and 6 set to “01,” the inter-
polation rate of the AD9777 is 2
×
. Modulation is achieved by
multiplying successive samples at the interpolation filter output
by the sequence (1, –1). Figures 26a–26d represent the spectral
response of the AD9777 DAC output with 2
×
interpolation in the
various modulation modes to a narrow band baseband signal (again,
the tall rectangles in the graphic). The advantage of interpolation
becomes clear in Figures 26a–26d, where it can be seen that the
images that would normally appear in the spectrum around the
input data rate frequency are suppressed by >70 dB. Another
significant point is that the interpolation filtering is done previous
to the digital modulator. For this reason, as Figures 26a–26d
show, the pass band of the interpolation filters can be frequency
shifted, giving the equivalent of a high-pass digital filter.
Note that when using the f
S
/4 modulation mode, there is no true
stop band as the band edges coincide with each other. In the f
S
/8
modulation mode, amplitude scaling occurs over only a portion of
the digital filter pass band due to constructive addition over just
that section of the band.
Figure 26. Effects of Digital Modulation on DAC Output Spectrum, Interpolation = 2
×
f
OUT
(
f
DATA
)
0
0.5
A
–100
0
–80
–60
–40
–20
1.0
1.5
2.0
Figure 26a. 2
×
Interpolation, Modulation = Disabled
f
OUT
(
f
DATA
)
0
0.5
A
–100
0
–80
–60
–40
–20
1.0
1.5
2.0
Figure 26b. 2
×
Interpolation, Modulation = f
DAC
/2
f
OUT
(
f
DATA
)
0
0.5
A
–100
0
–80
–60
–40
–20
1.0
1.5
2.0
Figure 26c. 2
×
Interpolation, Modulation = f
DAC
/4
f
OUT
(
f
DATA
)
0
0.5
A
–100
0
–80
–60
–40
–20
1.0
1.5
2.0
Figure 26d. 2
×
Interpolation, Modulation = f
DAC
/8
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| AD9777BSVRL | 制造商:Analog Devices 功能描述:DAC 2-CH R-2R 16-bit 80-Pin TQFP EP T/R |
| AD9777BSVZ | 功能描述:IC DAC 16BIT DUAL 160MSPS 80TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TxDAC+® 標準包裝:1 系列:- 設置時間:4.5µs 位數(shù):12 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 電壓電源:單電源 功率耗散（最大）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:8-SOICN 包裝:剪切帶 (CT) 輸出數(shù)目和類型:1 電壓，單極；1 電壓，雙極 采樣率（每秒）:* 其它名稱:MCP4921T-E/SNCTMCP4921T-E/SNRCTMCP4921T-E/SNRCT-ND |
| AD9777BSVZ | 制造商:Analog Devices 功能描述:IC 16-BIT DAC ((NW)) 制造商:Analog Devices 功能描述:IC, DAC, 16BIT, 400MSPS, TQFP-80 |
| AD9777BSVZ | 制造商:Analog Devices 功能描述:IC DAC 16BIT 400MSPS 80TQFP |
| AD9777BSVZRL | 功能描述:IC DAC 16BIT DUAL 160MSPS 80TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)模轉(zhuǎn)換器 系列:TxDAC+® 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1,000 系列:- 設置時間:1µs 位數(shù):8 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:8 電壓電源:雙 ± 功率耗散（最大）:941mW 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC W 包裝:帶卷 (TR) 輸出數(shù)目和類型:8 電壓，單極 采樣率（每秒）:* |
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