AD9648 Analog Devices, AD9648 Datasheet - Page 20

• Manufacturer Part Number: AD9648
• Description: 14-Bit, 125 MSPS/105 MSPS, 1.8 V Dual Analog-to-Digital Converter
• Manufacturer: Analog Devices

Specifications of AD9648

• Resolution (bits): 14bit
• # Chan: 2
• Sample Rate: 125MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9648
AD9648-125
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input, 1.0 V internal reference, and DCS enabled, unless
otherwise noted.
100
Figure 15. SNR/SFDR vs. Input Frequency (AIN) with 2 V p-p Full Scale
95
90
85
80
75
70
65
60
55
50
–105
–105
–120
–120
–135
–135
120
100
–15
–15
–30
–30
–45
–45
–60
–60
–75
–75
–90
–90
Figure 16. SNR/SFDR vs. Input Amplitude (AIN) with f
80
60
40
20
0
Figure 14. Two-Tone FFT with f
0
0
0
–90
–80
6M
6M
SFDRFS
SNRFS
50
12M 18M 24M 30M 36M 42M 48M 54M 60M
12M 18M 24M 30M 36M 42M 48M 54M 60M
ANALOG INPUT FREQUENCY (MHz)
–70
SFDR
INPUT AMPLITUDE (dBFS)
–60
2F1 – F2
FREQUENCY (MHz)
SNR
100
–50
IN1
SNR (dBFS)
SFDR (dBc)
= 29 MHz and f
–40
150
2F1 + F2
2F2 – F1
–30
–20
IN2
200
IN
= 32 MHz
= 9.7 MHz
–10
0
250
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Figure 17. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with f
120
100
80
60
40
20
–110
120
100
0
–10
–30
–50
–70
–90
80
60
40
20
5
0
– 90
5
Figure 19. SNR/SFDR vs. Sample Rate with AIN = 70.1 MHz
Figure 18. SNR/SFDR vs. Sample Rate with AIN = 9.7 MHz
15
IMD3(dBc)
15
SFDR (dBFS)
– 80
25
25
SFDR (dBc)
– 70
35
35
INPUT AMPLITUDE (dBFS)
45
SAMPLE RATE (MSPS)
45
SAMPLE RATE (MSPS)
– 60
and f
IMD3 (dBFS)
SNR (dBFS)
SFDR (dBc)
55
SFDR (dBc)
55
SNR (dBFS)
IN2
– 50
= 32 MHz
65
65
75
– 40
75
85
85
– 30
95
95
105 115 125
– 20
105 115 125
IN1
– 10
= 29 MHz