LTC2251/LTC2250
7
22510fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2251: SNR and SFDR vs
Sample Rate, 2V Range,
fIN = 5MHz, –1dB
LTC2251: SNR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
LTC2251: IOVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB,
OVDD = 1.8V
LTC2251: IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
LTC2251: SFDR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
LTC2251: SFDR vs Input Frequency,
–1dB, 2V Range, 125Msps
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
85
90
95
150
250
55210 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
22510 G11
100 120 140 160
SFDR
SNR
INPUT LEVEL (dBFS)
–50
SNR
(dBc
AND
dBFS)
30
40
50
–20
0
22510 G12
20
10
0
–40
–30
dBFS
dBc
–10
60
70
80
INPUT LEVEL (dBFS)
–50
SFDR
(dBc
AND
dBFS)
60
80
100
–10
22510 G13
40
20
50
70
90
30
10
0
–40
–30
–20
0
dBFS
dBc
SAMPLE RATE (Msps)
0
I VDD
(mA)
130
140
80
22510 G14
120
110
125
135
145
115
105
100
95
20
40
60
100
140
120
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
I OVDD
(mA)
7
60
22510 G15
4
2
20
40
80
1
0
8
6
5
3
100
120
140
LTC2251: SNR vs SENSE,
fIN = 5MHz, –1dB
SENSE PIN (V)
0.4
SNR
(dBFS)
61.6
0.7
22510 G31
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