Datasheet

LTC2255/LTC2254
8
22554fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2254: 8192 Point FFT,
f
IN
= 30MHz, –1dB, 2V Range,
105Msps
LTC2254: 8192 Point FFT,
f
IN
= 70MHz, –1dB, 2V Range,
105Msps
LTC2254: 8192 Point FFT,
f
IN
= 140MHz, –1dB, 2V Range,
105Msps
LTC2254: 8192 Point 2-Tone FFT,
f
IN
= 28.2MHz and 26.8MHz,
–1dB, 2V Range, 105Msps
LTC2254: Grounded Input
Histogram, 105Msps
LTC2254: SNR vs Input Frequency,
–1dB, 2V Range, 105Msps
LTC2254: 8192 Point FFT,
f
IN
= 5MHz, –1dB, 2V Range,
105Msps
FREQUENCY (MHz)
AMPLITUDE (dB)
22554 G19
0
10 20
30 40
50
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
FREQUENCY (MHz)
AMPLITUDE (dB)
22554 G20
0
10 20
30 40
50
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
FREQUENCY (MHz)
AMPLITUDE (dB)
22554 G21
0
10 20
30 40
50
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
FREQUENCY (MHz)
AMPLITUDE (dB)
22554 G22
0
10 20
30 40
50
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
FREQUENCY (MHz)
AMPLITUDE (dB)
22554 G23
0
10 20
30 40
50
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
CODE
8183 8185 8187 8189 8191 8193
31
54 68
581 637
COUNT
12000
16000
20000
22554 G24
8000
4000
10000
14000
18000
6000
2000
0
3380 3316
11299
10516
17646
18027
INPUT FREQUENCY (MHz)
0
65
SNR (dBFS)
66
68
69
70
75
72
100
200
250
33554 G25
67
73
74
71
50
150
300
350
LTC2254: Typical INL,
2V Range, 105Msps
LTC2254: Typical DNL,
2V Range, 105Msps
CODE
0
DNL ERROR (LSB)
12288
22554 G018
4096 8192 16384
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
CODE
0
INL ERROR (LSB)
12288
22554 G17
4096 8192 16384
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0