AD6644 Analog Devices, AD6644 Datasheet - Page 10

• Manufacturer Part Number: AD6644
• Description: 14-Bit, 40 MSPS/65 MSPS Analog-to-Digital Converter
• Manufacturer: Analog Devices

Specifications of AD6644

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 2.2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD6644
100
–100
–110
–120
–130
120
110
100
95
90
85
80
75
70
65
60
55
–10
–20
–30
–40
–50
–60
–70
–80
–90
90
80
70
60
50
40
30
20
10
0
0
–80
0
0
ENCODE = 65MSPS
AIN = 19MHz,
NO DITHER
Figure 10. Harmonics vs. Analog Frequency (IF)
Figure 12. Two Tones at 19 MHz and 19.5 MHz
10
ENCODE = 65MSPS
AIN = 15.5MHz
–70
WORST OTHER SPUR
HARMONICS (SECOND, THIRD)
19.5MHz @ –7dBFS
20
5
ANALOG INPUT POWER LEVEL (dBFS)
Figure 11. Single-Tone SFDR
–60
ANALOG FREQUENCY (MHz)
30
10
–50
FREQUENCY (MHz)
40
50
15
–40
60
–30
ENCODE = 65MSPS
AIN = –1dBFS
20
dBc
SFDR = 90dB
REFERENCE LINE
70
dBFS
–20
80
25
–10
90
30
100
0
Rev. D | Page 10 of 24
–100
–110
–120
–130
110
100
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
90
80
70
60
50
40
30
20
10
95
90
85
80
75
70
65
60
0
–77
0
0
0
Figure 13. Two Tones at 15 MHz and 15.5 MHz
ENCODE = 65MSPS
F1 = 15MHz
F2 = 15.5MHz
10
Figure 15. SNR, Worst Spurious vs. Encode
–67
5
INPUT POWER LEVEL [(F1 = F2) dBFS]
20
Figure 14. Two-Tone SFDR
ENCODE FREQUENCY (MHz)
–57
30
10
FREQUENCY (MHz)
WORST SPUR
–47
40
SNR
15
50
–37
AIN = 2.2MHz @ –1dBFS
ENCODE = 65MSPS
AIN = 15MHz,
NO DITHER
dBc
60
20
SFDR = 90dB
REFERENCE LINE
15.5MHz @ –7dBFS
–27
70
25
dBFS
80
–17
30
90
–7