Datasheet

LTC2253/LTC2252
7
22532fa
LTC2253: SFDR vs Input Frequency,
–1dB, 2V Range, 125Msps
LTC2253: SNR and SFDR vs Sample
Rate, 2V Range, f
IN
= 5MHz, –1dB
LTC2253: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OV
DD
= 1.8V
LTC2253: SNR vs Input Level,
f
IN
= 70MHz, 2V Range, 125Msps
INPUT FREQUENCY (MHz)
0
SFDR (dBFS)
85
90
95
150 250
22532 G10
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 G11
100 120 140 160
SFDR
SNR
INPUT LEVEL (dBFS)
–60
SNR (dBc AND dBFS)
30
40
50
–30
–10
22532 G13
20
10
0
–50 –40
dBFS
dBc
–20
60
70
80
0
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2253: SFDR vs Input Level,
f
IN
= 70MHz, 2V Range, 125Msps
LTC2253: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
INPUT LEVEL (dBFS)
–60
0
SFDR (dBc AND dBFS)
20
40
50
10
30
60
80
–40 –20–50 –30 –10
22532 G14
0
100
110
70
90
dBFS
dBc
SAMPLE RATE (Msps)
0
I
VDD
(mA)
130
140
80 100
22532 G15
120
110
125
135
145
115
105
100
95
20
40
60
120
140
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
I
OVDD
(mA)
4
6
8
80 100
22532 G16
2
3
5
7
1
0
20
40
60
120
140
LTC2253: SNR vs SENSE,
f
IN
= 5MHz, –1dB
SENSE PIN (V)
0.4
SNR (dBFS)
71
0.7
22532 G32
68
66
0.5 0.6 0.8
65
64
72
70
69
67
0.9 1.0 1.1