TYPICAL CHARACTERISTICS: AVDD = 3.3V (Cont.)
TMIN = –40°C, TMAX = +85°C, typical values are at TA = +25°C, sampling rate = 40MSPS, 50% clock duty cycle, AVDD = 3.3V, DVDD = 3.3V, VDRV = 2.5V, –1dBFS,
DCA off, internal reference voltage, and 2VPP differential input, unless otherwise noted.
SWEPT POWER (SNR)
EXTERNAL REFERENCE
SFDR/SNR vs CLOCK DUTY CYCLE
(DCA = Duty Cycle Adjust)
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
dBFS
SFDR: DCA off
SFDR: DCA on
SNR: DCA off
SNR: DCA on
dBc
−10
−20
fIN = 9.7MHz
–20 –10
–80
–70
–60
–50
–40
–30
0
30
35
40
45
50
55
60
65
70
Analog Input Level (dBFS)
Duty Cycle (%)
SWEPT POWER (SFDR)
SNR, SFDR vs INPUT FREQUENCY
100
90
80
70
60
50
40
30
20
10
0
90
85
80
75
70
65
60
55
50
45
dBFS
SFDR
SNR
dBc
fIN = 9.7MHz
–20 –10
–80
–70
–60
–50
–40
–30
0
1
10
100
Analog Input Level (dBFS)
Frequency (MHz)
DYNAMIC PERFORMANCE vs TEMPERATURE
fIN = 2.4MHz
DYNAMIC PERFORMANCE vs TEMPERATURE
fIN = 9.7MHz
95
90
85
80
75
70
65
60
55
95
90
85
80
75
70
65
60
SFDR
SFDR
SNR
SNR
−50
−25
0
25
50
75
100
−50
−25
0
25
50
75
100
Temperature (°C)
Temperature (°C)
ADS5220
8
SBAS261A
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