Datasheet

AD9148 Data Sheet
Rev. B | Page 16 of 72
–90
–85
–80
–75
–70
–65
–60
–55
–50
–45
–40
–35
–30
0 50 100 150 200 250 300
f
OUT
(MHz)
HARMONIC LEVEL (dBc)
0dBFS, SECOND HARMONIC
–6dBFS, SECOND HARMONIC
–12dBFS, SECOND HARMONIC
–18dBFS, SECOND HARMONIC
08910-012
Figure 12. Second Harmonic vs. f
OUT
over Digital Scale,
Full-Scale Current = 20 mA, 4× Interpolation, f
DATA
= 150 MSPS
–90
–85
–80
–75
–70
–65
–60
–55
–50
–45
–40
–35
–30
0 50 100 150 200 250 300
f
OUT
(MHz)
HARMONIC LEVEL (dBc)
10mA, SECOND HARMONIC
20mA, SECOND HARMONIC
30mA, SECOND HARMONIC
10mA, THIRD HARMONIC
20mA, THIRD HARMONIC
30mA, THIRD HARMONIC
08910-013
Figure 13. Second Harmonic vs. f
OUT
over Full-Scale Current,
Digital Scale = 0 dBFS, 4× Interpolation, f
DATA
= 150 MSPS
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0 100 200 300 400 500 600
POWER LEVEL (dBm)
FREQUENCY (MHz)
08910-014
Figure 14. 4× Interpolation, f
DATA
= 150 MSPS, f
OUT
= 131 MHz
–90
–85
–80
–75
–70
–65
–60
–55
–50
–45
–40
–35
–30
0 50 100 150 200 250 300
f
OUT
(MHz)
HARMONIC LEVEL (dBc)
0dBFS, THIRD HARMONIC
–6dBFS, THIRD HARMONIC
–12dBFS, THIRD HARMONIC
–18dBFS, THIRD HARMONIC
08910-015
Figure 15. Third Harmonic vs. f
OUT
over Digital Scale,
Full-Scale Current = 20 mA, 4× Interpolation, f
DATA
= 150 MSPS
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0 100 200 300 400 500 600
POWER LEVEL (dBm)
FREQUENC
Y (MHz)
08910-016
Figure 16. 2× Interpolation, f
DATA
= 310 MSPS, f
OUT
= 131 MHz
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0 100 200 300 400 500 600
700 800 900 1000
POWER LEVEL (dBm)
FREQUENCY (MHz)
08910-017
Figure 17. 8× Interpolation, f
DATA
= 125 MSPS, f
OUT
= 131 MHz