AD9251 Analog Devices, AD9251 Datasheet - Page 15

• Manufacturer Part Number: AD9251
• Description: 14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
• Manufacturer: Analog Devices

Specifications of AD9251

• Resolution (bits): 14bit
• # Chan: 2
• Sample Rate: 80MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP

AD9251-65
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, DCS
disabled, unless otherwise noted.
–105
–120
–105
–120
–105
–120
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
0
0
0
65MSPS
30.5MHz @ –1dBFS
SNR = 73.3dB (74.3dBFS)
SFDR = 99.3dBc
Figure 19. Single-Tone FFT with f
Figure 20. Single-Tone FFT with f
Figure 18. Single-Tone FFT with f
3
3
3
2
6
6
6
6
4
9
9
9
2
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
12
12
12
6
15
15
15
3
5
18
18
18
65MSPS
9.7MHz @ –1dBFS
SNR = 73.5dB (74.5dBFS)
SFDR = 97.7dBc
65MSPS
70.3MHz @ –1dBFS
SNR = 72.6dB (73.6dBFS)
SFDR = 94.1dBc
2
21
21
IN
21
IN
IN
4
= 70.3 MHz
= 30.5 MHz
= 9.7 MHz
5
24
24
24
4
27
5
27
3
27
3
30
30
30
6
Rev. A | Page 15 of 36
Figure 21. SNR/SFDR vs. Input Amplitude (AIN) with f
100
120
100
90
80
70
60
50
40
30
20
10
80
60
40
20
0
0
–90
0
Figure 22. SNR/SFDR vs. Input Frequency (AIN) with
–80
SNRFS
50
INPUT FREQUENCY (MHz)
INPUT AMPLITUDE (dBFS)
–60
2 V p-p Full Scale
SNR (dBFS)
SFDR
SFDRFS
100
–40
SFDR (dBc)
SNR
150
–20
IN
= 9.7 MHz
AD9251
200
0