
LTC2281
7
2281fb
TYPICAL PERFORMANCE CHARACTERISTICS
SNR vs Input Frequency,
–1dB, 2V Range, 125Msps
SFDR vs Input Frequency,
–1dB, 2V Range, 125Msps
SNR and SFDR vs Sample Rate,
2V Range, fIN = 5MHz, –1dB
SNR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
SFDR vs Input Level,
fIN = 70MHz, 2V Range, 125Msps
IVDD vs Sample Rate,
5MHz Sine Wave Input, –1dB
IOVDD vs Sample Rate, 5MHz Sine
Wave Input, –1dB, 0VDD = 1.8V
SNR vs SENSE, fIN = 5MHz, –1dB
INPUT FREQUENCY (MHz)
0
55
SNR
(dBFS)
56
58
59
60
65
62
100
200
250
2281 G10
57
63
64
61
50
150
300
350
INPUT FREQUENCY (MHz)
0
SFDR
(dBFS)
85
90
95
150
250
2281 G11
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
2281 G12
100 120 140 160
SFDR
SNR
INPUT LEVEL (dBFS)
–50
SNR
(dBc
AND
dBFS)
30
40
50
–20
0
2281 G13
20
10
0
–40
–30
dBFS
dBc
–10
60
70
80
INPUT LEVEL (dBFS)
–50
SFDR
(dBc
AND
dBFS)
60
80
100
–10
2281 G14
40
20
50
70
90
30
10
0
–40
–30
–20
0
dBFS
dBc
SAMPLE RATE (Msps)
0
I VDD
(mA)
260
280
80
2281 G15
240
220
250
270
290
230
210
200
190
20
40
60
100
120
140
2V RANGE
1V RANGE
SAMPLE RATE (Msps)
0
I OVDD
(mA)
14
60
2281 G16
8
4
20
40
80
2
0
16
12
10
6
100
120
140
SENSE PIN (V)
0.4
SNR
(dBFS)
61.6
0.7
2281 G17
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
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