AD6645 Analog Devices, AD6645 Datasheet - Page 11

• Manufacturer Part Number: AD6645
• Description: 14-Bit, 80 MSPS/105 MSPS A/D Converter
• Manufacturer: Analog Devices

Specifications of AD6645

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 105MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 2.2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

–100
–110
–120
–130
100
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100
–10
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–80
–90
95
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75
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90
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20
10
0
Figure 18. SNR, Worst-Case Spurious vs. Encode @ 2.2 MHz
–77
0
15
0
Figure 16. Two-Tone SFDR @ 30.5 MHz and 31.5 MHz
Figure 17. Two-Tone SFDR @ 30.5 MHz and 31.5 MHz
ENCODE = 80MSPS
AIN = 30.5MHz,
31.5MHz (–7dBFS)
NO DITHER
ENCODE = 80MSPS
F1 = 30.5MHz
F2 = 31.5MHz
–67
5
30
INPUT POWER LEVEL (F1 = F2 dBFS)
WORST SPUR @ AIN = 2.2MHz
10
–57
ENCODE FREQUENCY (MHz)
SNR @ AIN = 2.2MHz
45
FREQUENCY (MHz)
15
–47
60
dBc
20
–37
dBFS
25
SFDR = 90dB
REFERENCE LINE
75
–27
30
90
–17
35
105
–7
40
Rev. D | Page 11 of 24
–100
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–120
–130
110
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
95
90
85
80
75
70
65
90
80
70
60
50
40
30
20
10
Figure 21. SNR, Worst-Case Spurious vs. Encode @ 69.1 MHz
0
0
–77
15
0
Figure 19. Two-Tone SFDR @ 55.25 MHz and 56.25 MHz
Figure 20. Two-Tone SFDR @ 55.25 MHz and 56.25 MHz
ENCODE = 80MSPS
AIN = 55.25MHz,
56.25MHz (–7dBFS)
NO DITHER
ENCODE = 80MSPS
F1 = 55.25MHz
F2 = 56.25MHz
–67
5
30
INPUT POWER LEVEL (F1 = F2 dBFS)
WORST SPUR @ AIN = 69.1MHz
10
–57
ENCODE FREQUENCY (MHz)
SNR @ AIN = 69.1MHz
45
FREQUENCY (MHz)
15
–47
dBc
60
20
–37
SFDR = 90dB
REFERENCE LINE
dBFS
25
75
–27
30
90
–17
35
AD6645
105
–7
40