AD6644PCB AD [Analog Devices], AD6644PCB Datasheet - Page 9

• Manufacturer Part Number: AD6644PCB
• Description: 14-Bit, 40 MSPS/65 MSPS A/D Converter
• Manufacturer: AD [Analog Devices]

REV. 0
–100
–110
–120
–130
–100
–110
–120
–130
–100
–110
–120
–130
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
0
0
0
0
Figure 9. Single Tone at 15.5 MHz
Figure 10. Single Tone at 30 MHz
Figure 8. Single Tone at 2.2 MHz
ENCODE = 65MSPS
AIN = 2.2MHz @ –1dBFS
SNR = 74.5dB
SFDR = 92dBc
ENCODE = 65MSPS
AIN = 30MHz @ –1dBFS
SNR = 73.5dB
SFDR = 85dBc
5
5
5
10
10
10
FREQUENCY – MHz
FREQUENCY – MHz
FREQUENCY – MHz
15
15
15
ENCODE = 65MSPS
AIN = 15.5MHz @ –1dBFS
SNR = 74dB
SFDR = 90dBc
20
20
20
25
25
25
30
30
30
Typical Performance Characteristics–
–9–
Figure 12. Harmonics vs. Analog Frequency (Nyquist)
Figure 11. Noise vs. Analog Frequency (Nyquist)
75.0
74.5
74.0
73.5
73.0
72.5
72.0
75
74
73
72
71
70
69
68
Figure 13. Noise vs. Analog Frequency (IF)
94
92
90
88
86
84
82
80
0
0
0
10
PHASE NOISE OF ANALOG SOURCE
DEGRADES PERFORMANCE
T =
5
5
20
T =
25 C,
ANALOG INPUT FREQUENCY – MHz
ANALOG FREQUENCY – MHz
30
85 C
10
10
FREQUENCY – MHz
85 C
ENCODE = 65MSPS, AIN = –1dBFS
TEMP =
40
LOW NOISE ANALOG SOURCE
ENCODE = 65MSPS, AIN = –1dBFS
TEMP = –25 C,
15
50
15
25 C,
T =
60
25 C
AIN = –1dBFS
ENCODE = 65MSPS
20
20
25 C,
25 C,
70
T =
80
85 C
T = –25 C
85 C
25
25
AD6644
25 C
90
100
30
30