0
ENCODE = 31MSPS
–10 AIN = 8MHz AT –0.5dBFS
SNR = 59.23dB
–20 SINAD = 59.1dB
H2 = –87dB
–30 H3 = –81dB
–40
–50
–60
–70
–80
–90
–100
0
15.5
TPC 7. FFT: FS = 31 MSPS, AIN = 8 MHz @ –0.5 dBFS,
Differential, 1 V p-p Input Range
AD9218
0
ENCODE = 31MSPS
–10 AIN = 8MHz AT –0.5dBFS
SNR = 59dB
–20 SINAD = 58.8dB
H2 = –78.7dB
–30 H3 = –72.9dB
–40
–50
–60
–70
–80
–90
–100
0
15.5
TPC 10. FFT: FS = 31 MSPS, AIN = 8 MHz @ –0.5 dBFS;
with AD8138 Driving ADC Inputs, 1 V p-p Input Range
80
75
2ND
3RD
70
65
60
SFDR
55
50
45
40
35
30
0
50
100
150
200
250
AIN FREQUENCY – MHz
TPC 8. Harmonic Distortion (Second and Third) and SFDR
vs. AIN Frequency (1 V p-p, FS = 105 MSPS)
0
–10
ENCODE = 105MSPS
AIN1 = 30.1MHz AT –7dBFS
–20 AIN2 = 31.1MHz AT –7dBFS
SFDR = –67dBFS
–30
–40
–50
–60
–70
–80
–90
–100
0
52.5
TPC 11. Two–Tone Intermodulation Distortion (30 MHz
and 31 MHz; 1 V p-p, FS = 105 MSPS)
80
75
2ND
70
3RD
65
60
SFDR
55
50
45
40
35
30
0
50
100
150
200
250
AIN FREQUENCY – MHz
TPC 9. Harmonic Distortion (Second and Third) and SFDR
vs. AIN Frequency (1 V p-p, FS = 80 MSPS)
0
ENCODE = 80MSPS
–10
AIN1 = 29.3MHz AT –7dBFS
–20
AIN2 = 30.3MHz AT –7dBFS
SFDR = –77dBFS
–30
–40
–50
–60
–70
–80
–90
–100
0
40
TPC 12. Two–Tone Intermodulation Distortion (29.3 MHz,
30.3 MHz; 1 V p-p, FS = 80 MSPS)
REV. 0
–11–