Datasheet

AD9649
Rev. 0 | Page 11 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
AD9649-80
AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate, 2 V p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle
clock, unless otherwise noted.
0
–15
–30
–45
–60
–75
–90
–105
–120
4 8 12 16 20 24 28 32 36
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
6
2
80MSPS
9.7MHz @ –1dBFS
SNR = 73.4dB (74.4dBFS)
SFDR = 94.4dBc
08539-033
Figure 4. AD9649-80 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
4
4
2
3
5
6
8 12162024283236
FREQUENCY (MHz)
AMPLITUDE (dBFS)
80MSPS
70.3MHz @ –1dBFS
SNR = 72.1dB (73.1dBFS)
SFDR = 93.5dBc
08539-062
Figure 5. AD9649-80 Single-Tone FFT with f
IN
= 70.3 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
4 8 12 16 20 24 28 32 36
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08539-200
80MSPS
30.5MHz @ –7dBFS
32.5MHz @ –7dBFS
SFDR = 89.5dBc (96.5dBFS)
F2–F1
F1 + F2
2F1 – F2
2F2 + F1
2F2 – F1
2F1 + F2
Figure 6. AD9649-80 Two-Tone FFT with f
IN1
= 30.5 MHz and f
IN2
= 32.5 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
4 8 12 16 20 24 28 32 36
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
6
2
80MSPS
30.5MHz @ –1dBFS
SNR = 73.2dB (74.2dBFS)
SFDR = 93.6dBc
08539-034
Figure 7. AD9649-80 Single-Tone FFT with f
IN
= 30.5 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
4
4
23
5
6
8 12162024283236
FREQUENCY (MHz)
AMPLITUDE (dBFS)
80MSPS
200MHz @ –1dBFS
SNR = 70.5dB (71.5dBFS)
SFDR = 80.2dBc
08539-036
Figure 8. AD9649-80 Single-Tone FFT with f
IN
= 200 MHz
0
–20
–40
–60
–80
–100
–120
–90 –78 –66 –54 –42 –30 –18 –6
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc/dBFS)
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
08539-054
Figure 9. AD9649-80 Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN)
with f
IN1
= 30.5 MHz and f
IN2
= 32.5 MHz