Datasheet

AD9629
Rev. 0 | Page 11 of 32
TYPICAL PERFORMANCE CHARACTERISTICS
AD9629-80
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
–135
40 8 12 16 20 24 28 32 36 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
6
+
2
5
80MSPS
9.7MHz @ –1dBFS
SNR = 70.2dB (71.2dBFS)
SFDR = 93.6dBc
08540-054
Figure 4. AD9629-80 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
40 8 12 16 20 24 28 32 36 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
6
+
2
80MSPS
69MHz @ –1dBFS
SNR = 69.9dB (70.9dBFS)
SFDR = 94.3dBc
08540-056
Figure 5. AD9629-80 Single-Tone FFT with f
IN
= 69 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
40 8 12 16 20 24 28 32 36 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
F2 – F1 2F2 – F1
2F1 + F2
F1 + F2
2F2 – F1 2F1 – F2
80MSPS
28.3 @ –7dBFS
30.6 @ –7dBFS
SFDR = 90dBc
08540-059
Figure 6. AD9629-80 Two-Tone FFT with f
IN1
= 28.3 MHz and f
IN2
= 30.6 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
40 8 12 16 20 24 28 32 36 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
+
2
6
80MSPS
30.6MHz @ –1dBFS
SNR = 70.1dB (71.1dBFS)
SFDR = 94.4dBc
08540-055
Figure 7. AD9629-80 Single-Tone FFT with f
IN
= 30.6 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
40 8 12 16 20 24 28 32 36 40
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
6
2
5
+
80MSPS
210.3MHz @ –1dBFS
SNR = 67.9dB (68.9dBFS)
SFDR = 83.2dBc
08540-058
Figure 8. AD9629-80 Single-Tone FFT with f
IN
= 210.3 MHz
–120
–100
–80
–60
–40
–20
0
–70 –60 –50 –40
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc/dBFS)
–30 –20 –10
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
08540-060
Figure 9. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with f
IN1
= 30.5 MHz
and f
IN2
= 32.5 MHz