參數(shù)資料
型號(hào)： AD9782
廠商： Analog Devices, Inc.
英文描述： 12-Bit, 200 MSPS/500 MSPS TxDAC+ with 2 x /4 x /8 x Interpolation and Signal Processing
中文描述： 12位，200 MSPS/500 MSPS的TxDAC系列與2 × / 4 × / 8 ×插值與信號(hào)處理
文件頁(yè)數(shù)： 32/52頁(yè)
文件大小： 1619K
代理商： AD9782
AD9782
Preliminary Technical Data
Table 32. Dual Channel Complex Modulation
MODSING
REALIMAG
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
Rev. PrC | Page 32 of 52
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
Imag output, modulation by f
DAC
/2
Imag output, modulation by f
DAC
/4
Imag 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 that the complex
modulating signal is defined for a positive frequency only; this
causes the output spectrum to be translated 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. Figure 52 shows the
complex modulations.
Table 33.
Modulation
None
f
DAC
/2
f
DAC
/4
f
DAC
/8
Modulated passband edges sinc shaping(lower/upper).
Interpolation
×2
0
–0.6708
–1.1932
–9.1824
–0.0175
–3.3447
–0.1160
–1.7195
None
0
–2.8241
–0.0701
–22.5378
–0.4680
–6.0630
–1.3723
–4.9592
×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 51. Complex Modulation
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