Datasheet

Data Sheet AD9645
Rev. 0 | Page 13 of 36
120
–20
–90 0
SNR/SFDR (dBFS/dBc)
INPUT AMPLITUDE (dBFS)
10537-015
SFDRFS
SFDR
SNRFS
SNR
0
20
40
60
80
100
–80 –70 –60 –50 –40 –30 –20 –10
Figure 15. SNR/SFDR vs. Analog Input Level; f
IN
= 9.7 MHz, f
SAMPLE
= 80 MSPS
0
–140
–120
–100
–80
–60
–40
–20
0 10 20 30 40
AMPLITUDE (dBFS)
FREQUENCY (MHz)
10537-016
AIN1 AND AIN2 = –7dBFS
SFDR = 90.8dBc
IMD2 = –94.2dBc
IMD3 = –92.7dBc
Figure 16. Two-Tone 16k FFT with f
IN1
= 70.5 MHz and f
IN2
= 72.5 MHz,
f
SAMPLE
= 80 MSPS
0
–20
–40
–60
–80
–100
–120
–90 –10–30–50–70
SFDR/IMD3 (dBc/dBFS)
INPUT AMPLITUDE (dBFS)
10537-017
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
Figure 17. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with
f
IN1
= 70.5 MHz and f
IN2
= 72.5 MHz, f
SAMPLE
= 80 MSPS
110
0
0 260
SNR/SFDR (dBFS/dBc)
INPUT FREQUENCY (MHz)
10537-018
70
10
20
30
40
50
60
80
90
100
100 120 1408020 40 60 240160 180 200 220
SFDR
SNR
Figure 18. SNR/SFDR vs. f
IN
; f
SAMPLE
= 80 MSPS
120
0
–40 –20 0 20 40 60 80
SNR/SFDR (dBFS/dBc)
TEMPERATURE (°C)
10
20
30
40
50
60
70
80
90
100
110
10537-019
SFDR
SNR
Figure 19. SNR/SFDR vs. Temperature; f
IN
= 9.7 MHz, f
SAMPLE
= 80 MSPS
1.0
–0.8
1
INL (LSB)
OUTPUT CODE
10537-020
–0.6
–0.4
–0.2
0
0.4
0.2
0.6
0.8
1367 2733 4099 5465 6831 8197 9563
10929 12295 13661 15027 16393
Figure 20. INL; f
IN
= 9.7 MHz, f
SAMPLE
= 80 MSPS