AD6645 Analog Devices, AD6645 Datasheet - Page 10

• 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

AD6645
Figure 12. Signal-to-Noise Ratio (SNR) vs. Analog Frequency (IF)
75.5
75.0
74.5
74.0
73.5
73.0
72.5
72.0
Figure 11. Worst-Case Harmonics vs. Analog Input Frequency
76
75
74
73
72
71
70
94
92
90
88
86
84
82
80
0
0
0
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = 25°C
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = –40°C, +25°C, +85°C
Figure 10. Signal-to-Noise Ratio (SNR) vs. Frequency
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = –40°C, +25°C, +85°C
20
10
10
40
T = +85°C
ANALOG INPUT FREQUENCY (MHz)
20
ANALOG FREQUENCY (MHz)
60
20
FREQUENCY (MHz)
80
30
30
100
T = +25°C
T = –40°C
40
40
120
T = –40°C, +85°C
140
50
50
160
T = +25°C
60
60
180
200
70
70
Rev. D | Page 10 of 24
100
120
110
100
120
110
100
95
90
85
80
75
70
65
60
90
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
–90
0
–90
0
ENCODE = 80MSPS @ AIN = –1dBFS
TEMP = 25°C
ENCODE = 80MSPS
AIN = 30.5MHz
ENCODE = 80MSPS
AIN = 69.1MHz
Figure 13. Harmonics vs. Analog Frequency (IF)
20
–80
–80
Figure 14. Single-Tone SFDR @ 30.5 MHz
Figure 15. Single-Tone SFDR @ 69.1 MHz
(SECOND, THIRD)
40
ANALOG INPUT POWER LEVEL (dBFS)
–70
ANALOG INPUT POWER LEVEL (dBFS)
–70
HARMONICS
ANALOG FREQUENCY (MHz)
60
–60
–60
80
WORST OTHER SPUR
–50
–50
100
dBc
dBc
–40
–40
SFDR = 90dB
REFERENCE LINE
120
SFDR = 90dB
REFERENCE LINE
–30
dBFS
–30
140
dBFS
–20
–20
160
180
–10
–10
200
0
0