Datasheet

AD9218
Rev. C | Page 14 of 28
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
015.5
02001-020
ENCODE = 31MSPS
A
IN
= 8MHz AT –0.5dBFS
SNR = 59.23dB
SINAD = 59.1dB
H2 = –87dB
H3 = –81dB
Figure 20. FFT: FS = 31 MSPS, A
IN
= 8 MHz @ –0.5 dBFS, Differential,
1 V p-p Input Range
30
35
40
45
50
55
60
65
70
75
80
(dB)
02001-021
0 50 100 150 200 250
A
IN
FREQUENCY (MHz)
SFDR
THIRD
SECOND
Figure 21. Harmonic Distortion (Second and Third) and
SFDR vs. A
IN
Frequency (1 V p-p, FS = 105 MSPS)
30
35
40
45
50
55
60
65
70
75
80
(dB)
02001-022
0 50 100 150 200 250
A
IN
FREQUENCY (MHz)
SFDR
THIRD
SECOND
Figure 22. Harmonic Distortion (Second and Third) and
SFDR vs. A
IN
Frequency (1 V p-p, FS = 80 MSPS)
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
015.5
02001-023
ENCODE = 31MSPS
A
IN
= 8MHz AT –0.5dBFS
SNR = 59dB
SINAD = 58.8dB
H2 = –78.7dB
H3 = –72.9dB
Figure 23. FFT: FS = 31 MSPS, A
IN
= 8 MHz @ –0.5 dBFS, Differential, with
AD8138 Driving ADC Inputs,1 V p-p Input Range
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
052.5
02001-024
ENCODE = 105MSPS
A
IN
1 = 30.1MHz AT –7dBFS
A
IN
2 = 31.1MHz AT –7dBFS
SFDR = –67dBFS
Figure 24. Two-Tone Intermodulation Distortion
(30.1 MHz and 31.1 MHz; 1 V p-p, FS = 105 MSPS)
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
(dB)
040
02001-025
ENCODE = 80MSPS
A
IN
1 = 29.3MHz AT –7dBFS
A
IN
2 = 30.3MHz AT –7dBFS
SFDR = –77dBFS
Figure 25. Two-Tone Intermodulation Distortion
(29.3 MHz and 30.3 MHz; 1 V p-p, FS = 80 MSPS)