LTC2255/LTC2254
7
22554fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2255: SNR and SFDR vs
Sample Rate, 2V Range,
fIN = 5MHz, –1dB
LTC2255: SNR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
LTC2255: IOVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OVDD = 1.8V
LTC2255: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2255: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
LTC2255: SFDR vs Input Frequency,
–1dB, 2V Range, 125Msps
INPUT FREQUENCY (MHz)
0
85
90
100
150
250
22554 G10
80
75
50
100
200
300
350
70
65
95
SFDR
(dBRS)
SAMPLE RATE (Msps)
0
50
SNR
AND
SFDR
(dBFS)
60
70
80
90
20
40
60
80
22554 G11
100 120 140 160
SFDR
SNR
INPUT LEVEL (dBFS)
–70
SNR
(dBc
AND
dBFS)
70
–40
22554 G13
40
20
–60
–50
–30
10
0
80
dBFS
dBc
60
50
30
–20
–10
0
INPUT LEVEL (dBFS)
–80
SFDR
(dBc
AND
dBFS)
60
90
100
0
22554 G14
50
40
0
–60
–40
–20
–70
–50
–30
–10
20
110
dBFS
dBc
80
70
30
10
SAMPLE RATE (Msps)
0
I VDD
(mA)
130
140
80
22554 G15
120
110
125
135
145
115
105
100
95
20
40
60
100
120
140
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
I OVDD
(mA)
7
60
22554 G16
4
2
20
40
80
1
0
8
6
5
3
100
120
140
LTC2255: SNR vs SENSE,
fIN = 5MHz, –1dB
SENSE PIN (V)
0.4
64
SNR
(dBFS)
65
67
68
69
74
71
0.6
0.8
0.9
22554 G32
66
72
73
70
0.5
0.7
1.0
1.1