LTC1748_15 Datasheet, PDF (7/20 Pages) Linear Technology – 14-Bit, 80Msps Low Noise ADC

TYPICAL PERFOR A CE CHARACTERISTICS
8192 Point FFT,
Input Frequency = 69.1MHz,
–10dB, 3.2V Range
0
–10
T_A = 25°C
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
5 10 15 20 25 30 35 40
FREQUENCY (MHz)
1748 G16
8192 Point 2-Tone FFT,
Input Frequency = 25MHz and
30MHz, –7dB, 3.2V Range
0
–10
T_A = 25°C
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0 5 10 15 20 25 30 35 40
FREQUENCY (MHz)
1748 G19
SFDR vs 30MHz Input Level
120
110
T_A = 25°C
dBFS
100
90
80
70
dBc
60
50
40
30
20
10
0
–80 –70 –60 –50 –40 –30 –20 –10 0
INPUT LEVEL (dBFS)
1748 G22
8192 Point FFT,
Input Frequency = 69.1MHz,
–20dB, 3.2V Range
0
–10
T_A = 25°C
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
5 10 15 20 25 30 35 40
FREQUENCY (MHz)
1748 G17
8192 Point 2-Tone FFT,
Input Frequency = 65MHz and
70MHz, –7dB, 3.2V Range
0
–10
T_A = 25°C
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0 5 10 15 20 25 30 35 40
FREQUENCY (MHz)
1748 G20
SFDR vs 50.3MHz Input Level
120
110
T_A = 25°C
100
90
80
70
dBFS
60
dBc
50
40
30
20
10
0
–80 –70 –60 –50 –40 –30 –20 –10 0
INPUT LEVEL (dBFS)
1748 G23
LTC1748
8192 Point 2-Tone FFT,
Input Frequency = 5MHz and
7MHz, –7dB, 3.2V Range
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
T_A = 25°C
5 10 15 20 25 30 35 40
FREQUENCY (MHz)
1748 G18
SFDR vs 15MHz Input Level
120
110
dBFS
T_A = 25°C
100
90
80
70
dBc
60
50
40
30
20
10
0
–80 –70 –60 –50 –40 –30 –20 –10 0
INPUT LEVEL (dBFS)
1748 G21
SFDR vs 70.3MHz Input Level
120
110
T_A = 25°C
100
90
80
70
60
50
40
30
20
10
dBFS
dBc
0
–80 –70 –60 –50 –40 –30 –20 –10 0
INPUT LEVEL (dBFS)
1748 G24
1748fa
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