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| 型號(hào)： | AD9786BSV |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 16-Bit, 200 MSPS/500 MSPS TxDAC+ with 2】/4】/8】 Interpolation and Signal Processing |
| 中文描述： | PARALLEL, WORD INPUT LOADING, 16-BIT DAC, PQFP80 |
| 封裝： | PLASTIC, MS-026-ADD, TQFP-80 |
| 文件頁數(shù)： | 37/60頁 |
| 文件大?。?/td> | 1497K |
| 代理商： | AD9786BSV |
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AD9786
Table 33. Dual Channel Complex Modulation
MODSING
REALIMAG
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
Rev. 0 | Page 37 of 60
MOD[1]
0
0
1
1
0
0
1
1
MOD[0]
0
1
0
1
0
1
0
1
Mode
Real output, no modulation
Real output, modulation by f
DAC
/2
Real output, modulation f
DAC
/4
Real output, modulation f
DAC
/8
Image output, no modulation
Image output, modulation by f
DAC
/2
Image output, modulation by f
DAC
/4
Image output, modulation by f
DAC
/8
In dual channel mode, the two channels may be modulated by
a complex signal, with either the real or imaginary modulation
result directed to the DAC. Assume initially, as in Figure 63,
that the complex modulating signal is defined for a positive
frequency only. This causes the output spectrum to be trans-
lated in frequency by the modulation factor only. No additional
sidebands are created as a result of the modulation process, and
therefore the bandwidth to the first image from the baseband
bandwidth is the same as the output of the interpolation filters.
Furthermore, pass bands will not overlap or touch. The sinc
shaping at the corners of the modulated signal band are
tabulated in Table 34. Figure 64, Figure 65, and Figure 66 show
the effects of complex modulation with varying interpolation
rates.
Table 34. Complex Modulated Pass-Band Edges Sinc Shaping
(Lower/Upper)
Interpolation
Modulation
None
×2
None
0
0
–2.8241
–0.6708
f
DAC
/2
–0.0701
–1.1932
–22.5378
–9.1824
f
DAC
/4
–0.4680
–0.0175
–6.0630
–3.3447
f
DAC
/8
–1.3723
–0.1160
–4.9592
–1.7195
×4
0
–0.1657
–2.3248
–6.1190
–0.2921
–1.9096
–0.0044
–0.7866
×8
0
–0.0413
–3.0590
–4.9337
–0.5974
–1.3607
–0.0727
–0.4614
–
f
D
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
0
f
D
/
f
D
/
3
D
/
f
D
/
5
D
/
3
D
/
7
D
/
f
D
FILTERED INTERPOLATION IMAGES
f
S
/8 MODULATION
NO NEGATIVE
SIDEBAND
–
f
D
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
–
f
D
/
0
f
D
/
f
D
/
3
D
/
f
D
/
5
D
/
3
D
/
7
D
/
f
D
0
Figure 63. Complex Modulation
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| AD9786BSVZ | 功能描述:IC DAC 16BIT INTERPOL/SP 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(biāo)準(zhǔn)包裝:1 系列:- 設(shè)置時(shí)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(yīng)商設(shè)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 |
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