6
LTC2239
2239fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
8192 Point FFT, fIN = 30MHz,
–1dB, 2V Range
8192 Point FFT, fIN = 70MHz,
–1dB, 2V Range
8192 Point FFT, fIN = 140MHz,
–1dB, 2V Range
Grounded Input Histogram
SNR vs Input Frequency,
–1dB, 2V Range
8192 Point 2-Tone FFT,
fIN = 28.2MHz and 26.8MHz,
–1dB, 2V Range
SFDR vs Input Frequency,
–1dB, 2V Range
SNR and SFDR vs Sample Rate,
2V Range, fIN = 5MHz, –1dB
SNR and SFDR
vs Clock Duty Cycle
FREQUENCY (MHz)
0
AMPLITUDE
(dB)
–60
–40
–20
0
35
2239 G04
–80
–100
–70
–50
–30
–10
–90
–110
–120
5
15
25
10
20
30
40
FREQUENCY (MHz)
0
AMPLITUDE
(dB)
–60
–40
–20
0
35
2239 G05
–80
–100
–70
–50
–30
–10
–90
–110
–120
5
15
25
10
20
30
40
FREQUENCY (MHz)
0
AMPLITUDE
(dB)
–60
–40
–20
0
35
2239 G06
–80
–100
–70
–50
–30
–10
–90
–110
–120
5
15
25
10
20
30
40
FREQUENCY (MHz)
0
AMPLITUDE
(dB)
–60
–40
–20
0
35
2239 G07
–80
–100
–70
–50
–30
–10
–90
–110
–120
5
15
25
10
20
30
40
CODE
100000
120000
140000
2239 G08
80000
60000
510
511
131072
512
00
40000
20000
0
COUNT
INPUT FREQUENCY (MHz)
0
55
SNR
(dBFS)
56
58
59
60
65
62
50
100
2239 G09
57
63
64
61
150
200
INPUT FREQUENCY (MHz)
0
85
90
100
150
2239 G10
80
75
50
100
200
70
65
95
SFDR
(dBFS)
SAMPLE RATE (Msps)
0
SNR
AND
SFDR
(dBFS)
80
90
100
80
2239 G11
70
60
50
10 20 30 40 50 60 70
90 100 110
SFDR
SNR
CLOCK DUTY CYCLE (%)
30
SNR
AND
SFDR
(dBFS)
75
80
85
60
2239 G12
70
65
40
50
35
65
45
55
70
60
55
90
SFDR: DCS ON
SNR: DCS ON
SNR: DCS OFF
SFDR: DCS OFF