AD9251 Analog Devices, AD9251 Datasheet - Page 17

• 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

AD9251-20
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
–15
–30
–45
–60
–75
–90
–15
–30
–45
–60
–75
–90
0
0
20MSPS
9.7MHz @ –1dBFS
SNR = 73.5dBFS (74.5dBFS)
SFDR = 97.2dBc
20MSPS
30.5MHz @ –1dBFS
SNR = 73.2dB (74.2dBFS)
SFDR = 98.1dBc
2
Figure 27. Single-Tone FFT with f
950k
950k
Figure 26. Single-Tone FFT with f
2
4
1.90
1.90
6
4
2.85 3.80 4.75 5.70 6.65 7.60 8.55 9.50
2.85 3.80 4.75 5.70 6.65 7.60 8.55 9.50
6
FREQUENCY (MHz)
FREQUENCY (MHz)
IN
IN
= 30.5 MHz
= 9.7 MHz
5
3
5
3
Rev. A | Page 17 of 36
Figure 28. SNR/SFDR vs. Input Amplitude (AIN) with f
120
100
80
60
40
20
–100
0
–90
–80
SFDR (dBc)
–70
INPUT AMPLITUDE (dBFS)
–60
SFDR (dBFS)
SNR (dBFS)
–50
–40
SNR (dBc)
–30
–20
IN
= 9.7 MHz
–10
AD9251
0