AD9775-EBZ Analog Devices Inc, AD9775-EBZ Datasheet - Page 34

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AD9775-EBZ

Manufacturer Part Number
AD9775-EBZ
Description
14Bit 160 MSPS Dual TxDAC+ D/A Converter
Manufacturer
Analog Devices Inc
Series
TxDAC+®r
Datasheet

Specifications of AD9775-EBZ

Number Of Dac's
2
Number Of Bits
14
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
AD9775
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
AD9775
MODULATION, INTERPOLATION = 4×
With Control Register 0x01, Bit 7 and Bit 6 set to 10, the
interpolation rate of the AD9775 is 4×. Modulation is achieved
by multiplying successive samples at the interpolation filter
output by the sequence (0, +1, 0, −1).
The Effects of the Digital Modulation on the DAC Output Spectrum, Interpolation = 4×
–100
–100
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
Figure 67. 4× Interpolation, Modulation Disabled
Figure 68. 4× Interpolation, Modulation = f
1
1
f
f
OUT
OUT
2
2
f
f
DATA
DATA
)
)
3
3
DAC
/4
4
4
Rev. E | Page 34 of 56
Figure 67 through Figure 70 represent the spectral response of
the AD9775 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. 4× Interpolation, Modulation = f
Figure 70. 4× Interpolation, Modulation = f
1
1
f
f
OUT
OUT
2
2
f
f
DATA
DATA
)
)
3
3
DAC
DAC
/2
/8
4
4

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