AD9776 Analog Devices, Inc., AD9776 Datasheet - Page 34

• Manufacturer Part Number: AD9776
• Description: Dual 12-/14-/16-bit, 1 Gsps, Digital-to-analog Converters
• Manufacturer: Analog Devices, Inc.

AD9776/AD9778/AD9779
Table 17. Interpolation Filter Modes, (Register 0x01, Bits<5:2>)
Interpolation
Factor <7:6>
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
4
4
4
4
4
4
4
4
2
2
2
2
1
Frequency normalized to f
DAC
.
Filter
Mode
<5:2>
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x00
0x01
0x02
0x03
Modulation
DC
DC shifted
F/8
F/8 shifted
F/4
F/4 shifted
3F/8
3F/8 shifted
F/2
F/2 shifted
−3F/8
−3F/8 shifted
−F/4
−F/4 shifted
−F/8
−F/8 shifted
DC
DC shifted
F/4
F/4 shifted
F/2
F/2 shifted
−F/4
−F/4 shifted
DC
DC shifted
F/2
F/2 shifted
Nyquist
Zone
Pass
Band
1
2
3
4
5
6
7
8
−8
−7
−6
−5
−4
−3
−2
−1
1
2
3
4
−4
−3
−2
−1
1
2
−2
−1
Rev. A | Page 34 of 56
F_Low
−0.05
0.0125
0.075
0.1375
0.2
0.2625
0.325
0.3875
−0.55
−0.4875
−0.425
−0.3625
−0.3
−0.2375
−0.175
−0.1125
−0.1
0.025
0.15
0.275
−0.6
−0.475
−0.35
−0.225
−0.2
0.05
−0.7
−0.45
1
Center
0
0.0625
0.125
0.1875
0.25
0.3125
0.375
0.4375
−0.5
−0.4375
−0.375
−0.25
−0.1875
−0.125
0
0.125
0.25
0.375
−0.5
−0.375
−0.25
0
0.25
−0.5
−0.25
−0.3125
−0.0625
−0.125
1
F_High
+0.05
0.1125
0.175
0.2375
0.3
0.3625
0.425
0.4875
−0.45
−0.3875
−0.343
−0.2625
−0.2
−0.1375
−0.075
−0.0125
+0.1
0.225
0.35
0.475
−0.4
−0.275
−0.15
−0.025
+0.2
0.45
−0.3
−0.05
1
Comments
In 8× interpolation;
BW (min) = 0.0375 × f
BW (max) = 0.1 × f
In 4× interpolation;
BW (min) = 0.075 × f
BW (max) = 0.2 × f
In 2× interpolation;
BW (min) = 0.15 × f
BW (max) = 0.4 × f
DAC
DAC
DAC
DAC
DAC
DAC