AD9644 Analog Devices, AD9644 Datasheet - Page 15

• Manufacturer Part Number: AD9644
• Description: 14-Bit, 80 MSPS/155 MSPS, 1.8V Dual, Serial Output A/D Converter
• Manufacturer: Analog Devices

Specifications of AD9644

• Resolution (bits): 14bit
• # Chan: 2
• Sample Rate: 155MSPS
• Analog Input Type: Diff-Bip
• Ain Range: 1.75 V p-p
• Adc Architecture: Pipelined

Data Sheet
Figure 17. AD9644-80 Two-Tone FFT with f
Figure 19. AD9644-80 Single-Tone SNR/SFDR vs. Sample Rate (f
–100
–120
–140
–100
–120
–140
100
–20
–40
–60
–80
–20
–40
–60
–80
95
90
85
80
75
70
Figure 18. AD9644-80 Two-Tone FFT with f
0
0
45
0
0
80MSPS
29.9MHz @ –7dBFS
32.9MHz @ –7dBFS
SFDR = 94.4dBc (101.4dBFS)
SNR CHANNEL B
SFDR CHANNEL B
SNR CHANNEL A
SFDR CHANNEL A
50
10
10
55
with f
SAMPLE RATE (MSPS)
f
FREQUENCY (MHz)
FREQUENCY (MHz)
IN2
= 172.1 MHz
60
IN
= 70. MHz
20
20
80MSPS
169.1MHz @ –7dBFS
172.1MHz @ –7dBFS
SFDR = 91.9dBc (98.9dBFS)
65
IN1
= 29.9 MHz and f
IN1
70
= 169.1 MHz and
30
30
75
IN2
= 32.9 MHz
80
40
40
S
)
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–0.25
–0.50
14,000
12,000
10,000
0.50
0.25
–0.2
–0.4
–0.6
–0.8
–1.0
8000
6000
4000
2000
1.0
0.8
0.6
0.4
0.2
0
0
0
0
0
Figure 20. AD9644-80 Grounded Input Histogram
N – 4 N – 3 N – 2 N – 1
Figure 22. AD9644-80 DNL with f
Figure 21. AD9644-80 INL with f
2000
200
4000
400
6000
600
OUTPUT CODE
OUTPUT CODE
OUTPUT CODE
8000
800
N
10,000 12,000 14,000 16,000
1000
N + 1 N + 2 N + 3 N + 4
IN
IN
= 30.3 MHz
= 30.3 MHz
1200
1400
AD9644
1600