AD6644 View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD6644 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
0
–10
ENCODE = 65MSPS
AIN = 2.2MHz @ –1dBFS
–20
SNR = 74.5dB
SFDR = 92dBc
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
5
10
15
20
25
30
FREQUENCY (MHz)
Figure 4. Single Tone at 2.2. MHz
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
ENCODE = 65MSPS
AIN = 15.5MHz @ –1dBFS
SNR = 74dB
SFDR = 90dBc
5
10
15
20
25
30
FREQUENCY (MHz)
Figure 5. Single Tone at 15.5 MHz
0
–10
ENCODE = 65MSPS
AIN = 30MHz @ –1dBFS
–20
SNR = 73.5dB
SFDR = 85dBc
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
5
10
15
20
25
30
FREQUENCY (MHz)
Figure 6. Single Tone at 30 MHz
AD6644
75.0
ENCODE = 65MSPS, AIN = –1dBFS
TEMP = –25°C, +25°C, +85°C
74.5
T = –25°C
74.0
T = +85°C
T = +25°C
73.5
73.0
72.5
72.0
0
5
10
15
20
25
30
FREQUENCY (MHz)
Figure 7. Noise vs. Analog Frequency (Nyquist)
94
ENCODE = 65MSPS, AIN = –1dBFS
TEMP = –25°C, +25°C, +85°C
92
90
T = –25°C, +85°C
88
T = +25°C
86
84
82
80
0
5
10
15
20
25
30
ANALOG INPUT FREQUENCY (MHz)
Figure 8. Harmonics vs. Analog Frequency (Nyquist)
75
LOW NOISE ANALOG SOURCE
74
73
72
71
PHASE NOISE OF ANALOG SOURCE
DEGRADES PERFORMANCE
70
69
AIN = –1dBFS
ENCODE = 65MSPS
68
0 10 20 30 40 50 60 70 80 90 100
ANALOG FREQUENCY (MHz)
Figure 9. Noise vs. Analog Frequency (IF)
Rev. D | Page 9 of 24
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