11
21454314fa
LTC2145-14/
LTC2144-14/LTC2143-14
LTC2144-14: 64k Point FFT,
fIN = 140MHz, –1dBFS, 105Msps
TYPICAL PERFORMANCE CHARACTERISTICS
LTC2144-14: 64k Point FFT,
fIN = 30MHz, –1dBFS, 105Msps
LTC2144-14: 64k Point FFT,
fIN = 70MHz, –1dBFS, 105Msps
LTC2144-14: 64k Point 2-Tone
FFT, fIN = 69MHz, 70MHz,
–1dBFS, 105Msps
LTC2144-14: Shorted Input
Histogram
LTC2144-14: SNR vs Input
Frequency, –1dBFS, 105Msps,
2V Range
LTC2144-14: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
105Msps, 2V Range
LTC2144-14: 2nd, 3rd Harmonic
vs Input Frequency, –1dBFS,
105Msps, 1V Range
LTC2144-14: SFDR vs Input Level,
fIN = 70MHz, 105Msps, 2V Range
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE
(dBFS) –50
–30
–40
–20
–10
0
10
20
30
40
50
21454314 G19
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE
(dBFS) –50
–30
–40
–20
–10
0
10
20
30
40
50
21454314 G20
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE
(dBFS) –50
–30
–40
–20
–10
0
10
20
30
40
50
21454314 G21
FREQUENCY (MHz)
0
–100
–110
–120
–70
–60
–80
–90
AMPLITUDE
(dBFS) –50
–30
–40
–20
–10
0
10
20
30
40
50
21454314 G22
OUTPUT CODE
8190
0
COUNT
3000
4000
5000
8192
8194
8196
6000
2000
1000
8198
21454314 G23
INPUT FREQUENCY (MHz)
0
72
71
70
74
73
SNR
(dBFS)
50
100
150
200
250
300
21454314 G24
SINGLE-ENDED
ENCODE
DIFFERENTIAL
ENCODE
0
50
100
150
200
250
300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND
AND
3RD
HARMONIC
(dBFS)
21454314 G25
2ND
3RD
0
50
100
150
200
250
300
INPUT FREQUENCY (MHz)
90
85
80
75
70
65
100
95
2ND
AND
3RD
HARMONIC
(dBFS)
218543 G26
2ND
3RD
INPUT LEVEL (dBFS)
120
90
80
100
110
SFDR
(dBc
AND
dBFS)
70
50
60
40
30
21454314 G27
–80 –70 –60 –50 –40 –30 –20 –10
0
dBc
dBFS