Datasheet

LTC2255/LTC2254
9
22554fa
LTC2254: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
O
VDD
= 1.8V
LTC2254: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2254: SFDR vs Input Level,
f
IN
= 70MHz, 2V Range, 105Msps
LTC2254: SNR vs Input Level,
f
IN
= 70MHz, 2V Range, 105Msps
INPUT LEVEL (dBFS)
–70
SNR (dBc AND dBFS)
70
–40
22554 G28
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 G29
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)
80
75
90
95
100
105
80
22554 G30
85
40
20
100
60 120
110
115
120
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
0
I
OVDD
(mA)
1
3
4
5
7
22554 G31
2
6
40
120100
20
60 80
LTC2254: SNR vs SENSE,
f
IN
= 5MHz, –1dB
SENSE PIN (V)
0.4
64
SNR (dBFS)
65
67
68
69
74
71
0.6
0.8
0.9
22554 G33
66
72
73
70
0.5
0.7
1.0
1.1
LTC2254: SFDR vs Input Frequency,
–1dB, 2V Range, 105Msps
LTC2254: SNR and SFDR vs
Sample Rate, 2V Range,
f
IN
= 5MHz, –1dB
INPUT FREQUENCY (MHz)
0
85
90
100
150 250
22554 G26
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 G27
100 120 140
SFDR
SNR