Datasheet

LTC2253/LTC2252
9
22532fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2252: SFDR vs Input
Frequency, –1dB, 2V Range,
105Msps
LTC2252: SNR and SFDR vs
Sample Rate, 2V Range,
f
IN
= 5MHz, –1dB
LTC2252: SNR vs Input Level,
f
IN
= 70MHz, 2V Range, 105Msps
LTC2252: SFDR vs Input Level,
f
IN
= 70MHz, 2V Range, 105Msps
LTC2252: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2252: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OV
DD
= 1.8V
INPUT FREQUENCY (MHz)
0
SFDR (dBFS)
85
90
95
150 250
22532 G26
80
75
50 100
200 300 350
70
65
SAMPLE RATE (Msps)
0
50
SNR AND SFDR (dBFS)
60
70
80
90
20 40 60 80
22532 G27
100 120 140
SFDR
SNR
INPUT LEVEL (dBFS)
–60
SNR (dBc AND dBFS)
30
40
50
–30
–10
22532 G28
20
10
0
–50 –40
dBFS
dBc
–20
60
70
80
0
INPUT LEVEL (dBFS)
–60
0
SFDR (dBc AND dBFS)
20
40
50
10
30
60
80
–40 –20–50 –30 –10
22532 G29
0
100
110
70
90
dBFS
dBc
SAMPLE RATE (Msps)
0
80
75
I
VDD
(mA)
85
95
100
105
80
22532 G30
90
4020 10060 120
110
115
120
1V RANGE
2V RANGE
SAMPLE RATE (Msps)
0
7
6
5
4
3
2
1
0
60 100
22532 G31
20 40
80 120
I
OVDD
(mA)
LTC2252: SNR vs SENSE,
f
IN
= 5MHz, –1dB
SENSE PIN (V)
0.4
SNR (dBFS)
71
0.7
22532 G33
68
66
0.5 0.6 0.8
65
64
72
70
69
67
0.9 1.0 1.1