Datasheet

Data Sheet AD9245
Rev. E | Page 13 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
DUT = AD9245-80, AVDD = 3.0 V, DRVDD = 2.5 V, maximum sample rate, DCS disabled, T
A
= 25°C, 2 V p-p differential input,
AIN = −0.5 dBFS, VREF = 1.0 V external, unless otherwise noted.
FREQUENCY (MHz)
AMPLITUDE (dBFS)
0 5 10 15 20 25 30 35
–120
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
40
03583-032
AIN = –0.5dBFS
SNR = 73.2dBc
ENOB = 11.8 BITS
SFDR = 92.8dBc
Figure 8. Single Tone 8K FFT @ 2.5 MHz
FREQUENCY (MHz)
AMPLITUDE (dBFS)
0 5 10 15 20 25 30 35
–120
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
40
03583-023
AIN = –0.5dBFS
SNR = 72.7dBc
ENOB = 11.8 BITS
SFDR = 87.6dBc
Figure 9. Single Tone 8K FFT @ 39 MHz
FREQUENCY (MHz)
AMPLITUDE (dBFS)
0 5 10 15 20 25 30 35
–120
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
40
03583-024
AIN = –0.5dBFS
SNR = 71.7dBc
ENOB = 11.5 BITS
SFDR = 81.6dBc
Figure 10. Single Tone 8K FFT @ 70 MHz
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc AND dBFS)
–30 –25 –20 –15 –10 –5
40
50
60
70
80
90
100
0
03583-033
SFDR (dBFS)
SNR (dBc)
SFDR = 90dBc
REFERENCE LINE
SFDR (dBc)
SNR (dBFS)
Figure 11. Single Tone SNR/SFDR vs. Input Amplitude (AIN) @ 2.5 MHz
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBc AND dBFS)
–30 –25 –20 –15 –10 –5
40
50
60
70
80
90
100
0
03583-034
SFDR (dBFS)
SNR (dBc)
SFDR = 90dBc
REFERENCE LINE
SFDR (dBc)
SNR (dBFS)
Figure 12. Single Tone SNR/SFDR vs. Input Amplitude (AIN) @ 39 MHz
SAMPLE RATE (MSPS)
SNR/SFDR (dBc)
0 20406080
50
60
70
80
90
100
100
03583-025
SFDR (DIFF)
SFDR (SE)
SNR (DIFF)
SNR (SE)
Figure 13. SNR/SFDR vs. Sample Rate @ 40 MHz