Datasheet

AD9218
Rev. C | Page 15 of 28
10
20
30
40
50
60
(dB)
70
80
90
0 20 40 60 80 100 120 140 160 180
A
IN
FREQUENCY (MHz)
02001-026
H2 1V
H2 2V
H3 2V
2V SINGLE-ENDED DRIVE
1V DIFFERENTIAL DRIVE
SFDR 2V
SFDR 1V
H3 1V
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
03
02001-029
2.5
ENCODE = 65MSPS
A
IN
1 = 28.1MHz AT –7dBFS
A
IN
2 = 29.1MHz AT –7dBFS
SFDR = –72.9dBFS
Figure 29. Two-Tone Intermodulation Distortion
(28 MHz, 29 MHz; 1 V p-p, FS = 65 MSPS)
Figure 26. Harmonic Distortion (Second and Third) and
SFDR vs. A
IN
Frequency (FS = 65 MSPS)
50
55
60
65
70
75
(dB)
80
85
90
30 4010 20 50 60 70
A
IN
FREQUENCY (MHz)
02001-027
SFDR
THIRD
SECOND
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
02
02001-030
0
ENCODE = 40MSPS
A
IN
1 = 10MHz AT –7dBFS
A
IN
2 = 11MHz AT –7dBFS
SFDR = 74dBc
Figure 30. Two-Tone Intermodulation Distortion
(10 MHz, 11 MHz; 1 V p-p, FS = 40 MSPS)
Figure 27. Harmonic Distortion (Second and Third) and
SFDR vs. A
IN
Frequency (1 V p-p, FS = 40 MSPS)
45
50
55
60
65
70
75
(dB)
40 60020 80100120
ENCODE RATE (MSPS)
02001-028
SFDR
SINAD
45
50
55
60
65
70
75
80
(dB)
403010 2005060
ENCODE RATE (MHz)
02001-031
SFDR
SNR
SINAD
7080
Figure 31. SINAD and SFDR vs. Encode Rate (A
Figure 28. SINAD and SFDR vs. Encode Rate (A
IN
= 10.3 MHz, 105 MSPS
Grade) A
IN
= 10.3 MHz, 65 MSPS Grade)
A
IN
= –0.5 dBFS Differential, 1 V p-p Analog Input Range )
IN
= –0.5 dBFS Differential, 1 V p-p Analog Input Range