AD9852ASQ Analog Devices Inc, AD9852ASQ Datasheet - Page 40

• Manufacturer Part Number: AD9852ASQ
• Manufacturer: Analog Devices Inc

Specifications of AD9852ASQ

• Lead Free Status / RoHS Status: Not Compliant

AD9852
As can be seen in Figure 60, the inverse sinc filter function
requires a significant amount of power. As an alternative
approach to maintaining flatness across the output bandwidth,
the digital multiplier function can be used to adjust the output
signal level at a dramatic savings in power consumption.
Careful planning and management when using this feature set
minimizes power dissipation and avoids exceeding junction
temperature requirements within the IC.
Figure 59 shows the supply current consumed by the AD9852
over a range of frequencies for two possible configurations. All
circuits enabled means the output scaling multiplier, the inverse
sinc filter, both DACs, and the on-board comparator are all
enabled. Basic configuration means the output scaling
multipliers, the inverse sinc filter, the control DAC, and the on-
board comparator are all disabled.
Figure 60 shows the approximate current consumed by each of
the four functions.
1400
1200
1000
800
600
400
200
0
Figure 59. Current Consumption vs. Clock Frequency
20
60
ALL CIRCUITS ENABLED
100
FREQUENCY (MHz)
140
180
BASIC CONFIGURATION
220
260
300
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Figure 60. Current Consumption by Function vs. Clock Frequency
500
450
400
350
300
250
200
150
100
50
0
20
60
CONTROL DAC
100
FREQUENCY (MHz)
140
INVERSE SINC FILTER
180
OUTPUT SCALING
MULTIPLIERS
220
COMPARATOR
260
300