TYPICAL CHARACTERISTICS(Cont.)
At TA = full specified temperature range, differential input range = 2V to 3V, sampling rate = 50MHz, and internal reference, unless otherwise noted.
SPECTRAL PERFORMANCE
(Sampling Frequency = 53MHz)
UNDERSAMPLING
(Sampling Frequency = 27MHz)
0
–20
0
–20
fIN = 50MHz
SNR = 65dBFS
SFDR = 73dBFS
fIN = 21MHz
SNR = 68dBFS
SFDR = 72dBFS
–40
–40
–60
–60
–80
–80
–100
–100
0
5.3
10.6
15.9
21.2
26.5
0
4.5
9.0
13.5
Frequency (MHz)
Frequency (MHz)
SWEPT POWER SFDR
dBFS
OUTPUT NOISE HISTOGRAM (DC INPUT)
3V Full-Scale
100
80
60
40
20
0
800k
600k
400k
200k
0
fIN = 10MHz
dBc
N – 2
N – 1
N
N + 1
N + 2
0
–10
–20
–30
–40
–50
–60
Code
Input Amplitude (dBFS)
DYNAMIC PERFORMANCE
vs SAMPLING FREQUENCY
(Differential Input)
SINAD vs SAMPLING FREQUENCY
(Differential Input)
75
70
65
60
55
90
fIN = 5MHz
fIN = 5MHz
SFDR (2Vp-p)
85
80
75
70
65
60
3Vp-p
SFDR (3Vp-p)
2Vp-p
SNR (3Vp-p)
SNR (2Vp-p)
45
35
40
45
50
55
60
35
40
50
55
60
Sampling Frequency (MHz)
Sampling Frequency (MHz)
ADS807
SBAS072A
7
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