AD9251 Analog Devices, AD9251 Datasheet - Page 14

• 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
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.
Figure 12. SNR/SFDR vs. Input Frequency (AIN) with 2 V p-p Full Scale
–0.1
–0.2
–0.3
–0.4
–0.5
100
120
100
0.5
0.4
0.3
0.2
0.1
90
80
70
60
50
40
30
20
10
80
60
40
20
0
0
0
Figure 13. SNR/SFDR vs. Sample Rate with AIN = 9.7 MHz
10
0
0
2048
20
Figure 14. DNL Error with f
4096
50
30
INPUT FREQUENCY (MHz)
SAMPLE RATE (MSPS)
6144
SNR (dBFS)
OUTPUT CODE
SNR (dBFS)
SFDR (dBc)
40
8192
100
SFDR (dBc)
50
10,240 12,288 14,336 16,384
IN
= 9.7 MHz
60
150
70
200
80
Rev. A | Page 14 of 36
Figure 15. SNR/SFDR vs. Input Amplitude (AIN) with f
450,000
400,000
350,000
300,000
250,000
200,000
150,000
100,000
–0.5
–1.0
–1.5
–2.0
50,000
120
100
2.0
1.5
1.0
0.5
80
60
40
20
0
0
–90
0
0
N – 4 N – 3 N – 2 N – 1
2048
–80
Figure 16. Grounded Input Histogram
SNRFS
Figure 17. INL with f
4096
INPUT AMPLITUDE (dBFS)
–60
6144
SFDR
OUTPUT CODE
SFDRFS
OUTPUT CODE
8192
–40
N
IN
10,240 12,288 14,336 16,384
= 9.7 MHz
SNR
N + 1 N + 2 N + 3 N + 4
–20
IN
= 9.7 MHz
0