![](http://datasheet.mmic.net.cn/Linear-Technology/LTC1749IFW-PBF_datasheet_101514/LTC1749IFW-PBF_6.png)
6
LTC1749
1749f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
8192 Point FFT, fIN = 30.2MHz,
–10dB, PGA = 0
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G07
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G08
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G09
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
8192 Point FFT, fIN = 30.2MHz,
–20dB, PGA = 0
8192 Point FFT, fIN = 70.03MHz,
–1dB, PGA = 0
8192 Point FFT, fIN = 70.03MHz,
–10dB, PGA = 0
8192 Point FFT, fIN = 70.03MHz,
–20dB, PGA = 0
8192 Point FFT, fIN = 140.2MHz,
–1dB, PGA = 1
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G10
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G11
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G12
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
8192 Point FFT, fIN = 140.2MHz,
–10dB, PGA = 1
8192 Point FFT, fIN = 140.2MHz,
–20dB, PGA = 1
8192 Point FFT, fIN = 250.2MHz,
–1dB, PGA = 1
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G13
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G14
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110
FREQUENCY (MHz)
0
AMPLITUDE
(dBFS)
–60
–30
–20
40
1749 G15
–70
–80
–120
10
20
30
5
15
25
35
–100
0
–10
–40
–50
–90
–110