AD9777BSV Analog Devices Inc, AD9777BSV Datasheet - Page 36
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AD9777BSV
Manufacturer Part Number
AD9777BSV
Description
IC DAC 16BIT DUAL 160MSPS 80TQFP
Manufacturer
Analog Devices Inc
Series
TxDAC+®r
Datasheet
1.AD9777BSVZ.pdf
(60 pages)
Specifications of AD9777BSV
Rohs Status
RoHS non-compliant
Settling Time
11ns
Number Of Bits
16
Data Interface
Parallel
Number Of Converters
2
Voltage Supply Source
Analog and Digital
Power Dissipation (max)
410mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
For Use With
AD9777-EBZ - BOARD EVALUATION FOR AD9777
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AD9777
MODULATION, INTERMODULATION = 4×
With Control Register 01h, Bit 7 and Bit 6 set to 10, the
interpolation rate of the AD9777 is 4×. Modulation is achieved
by multiplying successive samples at the interpolation filter
output by the sequence (0, +1, 0, −1).
The Effects of Digital Modulation on DAC Output Spectrum, Interpolation = 4x
–100
–100
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
Figure 67. 4x Interpolation, Modulation Disabled
Figure 68. 4x Interpolation, Modulation = f
1
1
f
f
OUT
OUT
( ×
( ×
2
2
f
f
DATA
DATA
)
)
3
3
DAC
/2
4
4
Rev. C | Page 36 of 60
Figure 67 to Figure 70 represent the spectral response of the
AD9777 DAC output with 4× interpolation in the various
modulation modes to a narrow band baseband signal.
–100
–100
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
Figure 69. 4x Interpolation, Modulation = f
Figure 70. 4x Interpolation, Modulation = f
1
1
f
f
OUT
OUT
( ×
( ×
2
2
f
f
DATA
DATA
)
)
3
3
DAC
DAC
/4
/8
4
4