AD9777-EB Analog Devices Inc, AD9777-EB Datasheet - Page 33

• Manufacturer Part Number: AD9777-EB
• Description: BOARD EVAL FOR AD9777
• Manufacturer: Analog Devices Inc
• Series: TxDAC+®r

Specifications of AD9777-EB

• Rohs Status: RoHS non-compliant
• Number Of Dac's: 2
• Number Of Bits: 16
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 160M
• Data Interface: Parallel
• Settling Time: 11ns
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9777

Amplitude modulating a baseband signal with a sine or a cosine
convolves the baseband signal with the modulating carrier in
the frequency domain. Amplitude scaling of the modulated
signal reduces the positive and negative frequency images by a
factor of 2. This scaling is very important in the discussion of
the various modulation modes.
e
e
–jωt
Figure 57. Real and Imaginary Components of
–jωt
Sinusoidal and Cosinusoidal Waveforms
/2j
/2
DC
DC
e
e
–jωt
–jωt
SINE
COSINE
/2j
/2
Rev. C | Page 33 of 60
The phase relationship of the modulated signals is dependent
on whether the modulating carrier is sinusoidal or cosinusoidal,
again with respect to the reference point of the viewer.
Examples of sine and cosine modulation are given in Figure 58.
Figure 58. Baseband Signal, Amplitude Modulated with Sine and Cosine Carriers
Ae
Ae
–jωt
–jωt
/2j
/2
DC
DC
Ae
Ae
–jωt
–jωt
/2j
/2
SINUSOIDAL
MODULATION
COSINUSOIDAL
MODULATION
AD9777