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AD9830AST Datasheet(PDF) 3 Page - Analog Devices

Part # AD9830AST
Description  CMOS Complete DDS
Download  16 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9830AST Datasheet(HTML) 3 Page - Analog Devices

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AD9830
REV. A
–3–
TIMING CHARACTERISTICS
Limit at
TMIN to TMAX
Parameter
(A Version)
Units
Test Conditions/Comments
t1
20
ns min
MCLK Period
t2
8
ns min
MCLK High Duration
t3
8
ns min
MCLK Low Duration
t4
1
8
ns min
WR
Rising Edge Before MCLK Rising Edge
t4A
1
8
ns min
WR
Rising Edge After MCLK Rising Edge
t5
8
ns min
WR
Pulse Width
t6
t1
ns min
Duration Between Consecutive WR Pulses
t7
5
ns min
Data/Address Setup Time
t8
3
ns min
Data/Address Hold Time
t9
1
8
ns min
FSELECT, PSEL0, PSEL1 Setup Time Before MCLK Rising Edge
t9A
1
8
ns min
FSELECT, PSEL0, PSEL1 Setup Time After MCLK Rising Edge
t10
t1
ns min
RESET
Pulse Duration
NOTES
1See Pin Description section.
Guaranteed by design, but not production tested.
t1
t2
t3
t4A
t4
t5
t6
MCLK
WR
Figure 2. WR–MCLK Relationship
A0, A1, A2
DATA
WR
t6
t8
t7
t5
VALID DATA
VALID DATA
Figure 3. Writing to a Phase/Frequency Register
t9
VALID DATA
VALID DATA
VALID DATA
t9A
t10
MCLK
FSELECT
PSEL0, PSEL1
RESET
Figure 4. Control Timing
(VDD = +5 V
5%; AGND = DGND = 0 V, unless otherwise noted)


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