AD9854/PCBZ Analog Devices Inc, AD9854/PCBZ Datasheet - Page 14

• Manufacturer Part Number: AD9854/PCBZ
• Description: 300 MHZ QUADRATURE DDS SYN. Eval Board
• Manufacturer: Analog Devices Inc
• Series: AgileRF™r

Specifications of AD9854/PCBZ

• Main Purpose: Timing, Direct Digital Synthesis (DDS)
• Utilized Ic / Part: AD9854
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9854
Figure 16 and Figure 17 show the narrow-band performance of the AD9854 when operating with a 200 MHz reference clock with the
REFCLK multiplier bypassed vs. a 20 MHz reference clock and the REFCLK multiplier enabled at 10×.
–100
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
–160
–170
0
0
CENTER 39.1MHz
CENTER 39.1MHz
10
Figure 16. Narrow-Band SFDR, 39.1 MHz, 50 kHz BW,
Figure 17. Narrow-Band SFDR, 39.1 MHz, 50 kHz BW,
200 MHz REFCLK with REFCLK Multiplier Bypassed
300 MHz REFCLK with REFCLK Multiplier Bypassed
A
20 MHz REFCLK with REFCLK Multiplier = 10×
OUT
= 5MHz
100
Figure 18. Residual Phase Noise,
FREQUENCY (Hz)
1k
A
5kHz/
5kHz/
OUT
= 80MHz
10k
100k
SPAN 50kHz
SPAN 50kHz
1M
Rev. E | Page 14 of 52
Figure 21. Supply Current vs. Output Frequency (Variation Is Minimal,
Expressed as a Percentage, and Heavily Dependent on Tuning Word)
–100
–110
–120
–130
–140
–150
–160
620
615
610
605
600
595
590
–90
55
54
53
52
51
50
49
48
0
10
0
300 MHz REFCLK with REFCLK Multiplier Bypassed
A
30 MHz REFCLK with REFCLK Multiplier = 10×
OUT
Figure 20. SFDR vs. DAC Current, 59.1 A
20
= 5MHz
100
5
Figure 19. Residual Phase Noise,
40
A
DAC CURRENT (mA)
OUT
FREQUENCY (MHz)
FREQUENCY (Hz)
10
1k
= 80MHz
60
80
15
10k
100
100k
20
OUT
120
,
140
25
1M