
LTC2251/LTC2250
9
22510fa
LTC2250: IOVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OVDD = 1.8V
LTC2250: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2250: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 105Msps
LTC2250: SNR vs Input Level,
fIN = 70MHz, 2V Range, 105Msps
INPUT LEVEL (dBFS)
–50
SNR
(dBc
AND
dBFS)
30
40
50
–20
0
22510 G27
20
10
0
–40
–30
dBFS
dBc
–10
60
70
80
INPUT LEVEL (dBFS)
–50
SFDR
(dBc
AND
dBFS)
60
80
100
–10
22510 G28
40
20
50
70
90
30
10
0
–40
–30
–20
0
dBFS
dBc
SAMPLE RATE (Msps)
0
80
75
I VDD
(mA)
85
95
100
105
80
22510 G29
90
40
20
100
60
120
110
115
120
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
7
6
5
4
3
2
1
0
60
100
22510 G30
20
40
80
120
I OVDD
(mA)
LTC2250: SNR vs SENSE,
fIN = 5MHz, –1dB
SENSE PIN (V)
0.4
SNR
(dBFS)
61.6
0.7
22510 G32
61.0
60.6
0.5
0.6
0.8
60.4
60.2
61.8
61.4
61.2
60.8
0.9
1
1.1
LTC2250: SFDR vs Input Frequency,
–1dB, 2V Range, 105Msps
LTC2250: SNR and SFDR vs
Sample Rate, 2V Range,
fIN = 5MHz, –1dB
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
85
90
95
150
250
55210 G25
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
22510 G26
100
120
140
SFDR
SNR