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Design Tools: ADIsimDDS
(Direct Digital Synthesis)
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AD9858
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Select DDS
AD5930
AD5932
AD9830
AD9831
AD9832
AD9833
AD9834
AD9835
AD9850
AD9851
AD9852
AD9854
AD9858
AD9859
AD9951
AD9952
AD9953
AD9954
AD9956
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Ref Clock Frequency
Hz
kHz
MHz
GHz
Desired Output Frequency
Hz
kHz
MHz
GHz
Ref Clock Multiplier
Bypass (no multiplier)
Actual Output Frequency
8.09999997727573
MHz
Frequency Tuning Word
0212D773
hex
bin
dec
Frequency Domain:
Time Domain:
Legend:
(DAC Images)
(DH3)
(DH2)
(PPT)
(FR)
Input Change Detected, Please Rerun the Model.
Start Frequency:
Hz
kHz
MHz
GHz
End Frequency:
Hz
kHz
MHz
GHz
Enable Filter:
View Tabular Display of Spurs
Display
DAC Images
DAC Harmonic Spurs
(DH2, DH3)
Configure
(to set level -dBc)
Primary Phase Truncation Spur
(PPT)
Configure
(to set level -dBc)
Filter Response
(FR)
Configure
(to set up filter)
Log:
No Messages
Tabular Display of Spurs
(hide)
(top)
KEY: f1 = Desired Output Frequency, f2 = Ref Clock, PPT Spur = Primary Phase Truncation Spur
DAC Images
DAC Harmonics 2nd Order
DAC Harmonics 3rd Order
Other Spurs
Formula
Frequency
(Hz)
Attenuation
(dBc)
Formula
Frequency
(Hz)
Attenuation
(dBc)
Formula
Frequency
(Hz)
Attenuation
(dBc)
Name
Frequency
(Hz)
Attenuation
(dBc)
DAC Harmonic Spurs Configuration
(hide)
(top)
Level of spurs relative to a full scale carrier:
dBc
Display 2nd Level Harmonics
(DH2)
Display 3rd Level Harmonics
(DH3)
The magnitudes of these spurs are dependent on layout and the properties of the clock and therefore are not predictable. A reasonable estimate of their level is -50dBc, but a large range may be observed.
Angle to Amplitude Spurs Configuration
(hide)
(top)
Level of spurs relative to a full scale carrier:
dBc
The magnitudes of these spurs are dependent on layout and the properties of the clock and therefore are not predictable. A reasonable estimate of their level is -70dBc, but a large range may be observed.
Primary Phase Truncation Spur Configuration
(hide)
(top)
Level of spurs relative to a full scale carrier:
dBc
The magnitude of this spur is dependent on layout and other factors and is therefore not predictable. A reasonable estimate of its level is -70dBc, but a large range may be observed.
Filter Response Configuration
(hide)
(top)
Filter Type
Lowpass
Bandpass
Filter Topology
Butterworth
Bessel
Elliptical
Chebyshev
Inverse Chebyshev
Off
Fc
Hz
kHz
MHz
GHz
Passband Ripple
dB
Filter Order
1
2
3
4
5
6
7
Stop Band Attenuation
dB
F1
Hz
kHz
MHz
GHz
F2
Hz
kHz
MHz
GHz
Passband Ripple
dB
Filter Order
1
2
3
4
5
6
7
Stop Band Attenuation
dB