AD9776A Analog Devices, AD9776A Datasheet - Page 36

• Manufacturer Part Number: AD9776A
• Description: Dual 12-Bit, 1 GSPS, Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9776A

• Resolution (bits): 12bit
• Dac Update Rate: 1GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: Par

AD9776A/AD9778A/AD9779A
Table 19. 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
Filter Modulation
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
f
f
f
3f
3f
f
f
−3f
−3f
−f
−f
−f
−f
DC
DC shifted
f
f
f
f
−f
−f
DC
DC shifted
f
f
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
/8
/8 shifted
/4
/4 shifted
/2
/2 shifted
DAC
DAC
/4
/4 shifted
/2
/2 shifted
/2
/2 shifted
/8
/8 shifted
/4
/4 shifted
/8
/8 shifted
/4
/4 shifted
/8
/8 shifted
Nyquist Zone
Pass Band
0
+1
+2
+3
+4
+5
+6
+7
±8
−7
−6
−5
−4
−3
−2
−1
0
+1
+2
+3
±4
−3
−2
−1
0
+1
±2
−1
Rev. B | Page 36 of 56
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
Frequency Normalized to f
Center
0
+0.0625
+0.125
+0.1875
+0.25
+0.3125
+0.375
+0.4375
−0.5
−0.4375
−0.375
−0.3125
−0.25
−0.1875
−0.125
−0.0625
0
+0.125
+0.25
+0.375
−0.5
−0.375
−0.25
−0.125
0
+0.25
−0.5
−0.25
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
DAC
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