AD9858/FDPCB Analog Devices Inc, AD9858/FDPCB Datasheet - Page 27

• Manufacturer Part Number: AD9858/FDPCB
• Description: BOARD EVAL FOR AD9858/FD
• Manufacturer: Analog Devices Inc

Specifications of AD9858/FDPCB

• Rohs Status: RoHS non-compliant
• Design Resources: Low Jitter Sampling Clock Generator for High Performance ADCs Using AD9958/9858 and AD9515 (CN0109)
• Lead Free Status / Rohs Status: Not Compliant

APPLICATIONS INFORMATION
TUNING WORD
FREQUENCY
TUNING WORD
FREQUENCY
32
32
1GSPS
DDS
Figure 39. DDS Synthesizer AD9858 as Fractional N Synthesizer (Implemented in Fractional Divide Evaluation Board)
DIVIDER
DDS/DAC CLOCK
1GSPS
150MHz
DDS
REFERENCE
1/2
Figure 37. DDS Synthesizer Translation Loop Oscillator (Implemented in Translation Loop Evaluation Board)
150MHz
2GHz
CLOCK 1000MHz
10
DDS/DAC
10
FILTER
DAC
DAC
Figure 38. DDS Synthesizer Single-Loop PLL Up-Conversion
DC TO 400MHz
AD9858
DC TO 400MHz
DIVIDER
FILTER
1/2/4
AD9858
DAC
FILTER
Rev. C | Page 27 of 32
TUNING WORD
FREQUENCY
FREQUENCY
DETECTOR
AD9858
DIVIDER
PHASE/
150MHz
1GSPS
32
1/2/4
DDS
DIVIDER
1/2/4
DC TO 150MHz
DC TO 150MHz
f
REF
1000
MHz
f
REF
FREQUENCY
DETECTOR
CHARGE PUMP
(0.5mA STEPS)
0.5mA TO 2mA
PHASE/
150MHz
FREQUENCY
DETECTOR
DIVIDER
PHASE/
150MHz
FILTER
1/2
CHARGE PUMP
0.5mA TO 2mA
(0.5mA STEPS)
CHARGE PUMP
(0.5mA STEPS)
0.5mA TO 2mA
ANALOG
FILTER
MIXER
2GHz MAX
FIXED
LOOP
LOOP
(LO1)
2GHz
VCO
FILTER
LOOP
2GHz ±150MHz
DIVIDER
FILTER
LOOP
VCO
F = M ×
VCO
AD9858
f
REF