AD9776A Analog Devices, AD9776A Datasheet - Page 51

• 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

POWER DISSIPATION
Figure 91 to Figure 99 show the power dissipation of the 1.8 V and 3.3 V digital and clock supplies in single DAC mode and dual DAC
mode. In addition to this, the power dissipation/current of the 3.3 V analog supply (mode and speed independent) in single DAC mode is
102 mW/31 mA. In dual DAC mode, this is 182 mW/55 mA. When the PLL is enabled, it adds 50 mA/90 mW to the 1.8 V clock supply.
Figure 92. Power Dissipation, Digital 1.8 V Supply, I Data Only, Real Mode,
Figure 93. Power Dissipation, Clock 1.8 V Supply, I Data Only, Real Mode,
0.08
0.06
0.04
0.02
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.4
0.3
0.2
0.1
Includes Modulation Modes, Does Not Include Zero Stuffing
Figure 91. Total Power Dissipation, I Data Only, Real Mode
0
0
0
0
0
0
8× INTERPOLATION
25
25
25
8× INTERPOLATION,
ZERO STUFFING
8× INTERPOLATION
50
50
50
Does Not Include Zero Stuffing
75
75
75
100
100
100
f
f
f
DATA
DATA
DATA
8× INTERPOLATION
125
125
125
(MSPS)
(MSPS)
(MSPS)
4× INTERPOLATION,
4× INTERPOLATION
4× INTERPOLATION
ZERO STUFFING
150
150
150
2× INTERPOLATION
2× INTERPOLATION
1× INTERPOLATION
1× INTERPOLATION
175
175
175
2× INTERPOLATION,
1× INTERPOLATION,
4× INTERPOLATION
2× INTERPOLATION
1× INTERPOLATION
ZERO STUFFING
ZERO STUFFING
200
200
200
225
225
225
250
250
250
Rev. B | Page 51 of 56
Figure 96. Power Dissipation, Digital 1.8 V Supply, I and Q Data, Dual DAC
Figure 94. Power Dissipation, Digital 3.3 V Supply, I Data Only, Real Mode,
0.075
0.050
0.025
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0
0
0
0
4× INTERPOLATION,
ZERO STUFFING
8× INTERPOLATION, f
Figure 95. Total Power Dissipation, Dual DAC Mode
8× INTERPOLATION,
ZERO STUFFING
ALL INTERPOLATION MODES
25
Includes Modulation Modes and Zero Stuffing
25
25
Mode, Does Not Include Zero Stuffing
50
NO MODULATION
50
50
AD9776A/AD9778A/AD9779A
75
75
75
100 125 150 175 200 225
2× INTERPOLATION,
ZERO STUFFING
f
f
DAC
DAC
DAC
100
100
f
f
f
DATA
DATA
DATA
/8,
/4,
/2,
8× INTERPOLATION, ALL
MODULATION MODES
125
125
(MSPS)
(MSPS)
(MSPS)
1× INTERPOLATION,
ZERO STUFFING
4× INTERPOLATION
150
150
1× INTERPOLATION,
NO MODULATION
2× INTERPOLATION,
ALL MODULATION MODES
2× INTERPOLATION
175
175
4× INTERPOLATION,
ALL MODULATION
MODES
1× INTERPOLATION
200
200
250 275
225
225
250
300
250