Datasheet

LTC2251/LTC2250
9
22510fa
LTC2250: I
OVDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB,
O
VDD
= 1.8V
LTC2250: I
VDD
vs Sample Rate,
5MHz Sine Wave Input, –1dB
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LTC2250: SFDR vs Input Level,
f
IN
= 70MHz, 2V Range, 105Msps
LTC2250: SNR vs Input Level,
f
IN
= 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,
f
IN
= 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,
f
IN
= 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