LTC1668IG 查看數據表（PDF） - Linear Technology
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LTC1668IG Datasheet PDF : 24 Pages
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LTC1666/LTC1667/LTC1668
TYPICAL PERFOR A CE CHARACTERISTICS (LTC1668)
Single Tone SFDR at 50MSPS
0
SFDR = 87dB
–10
fCLOCK = 50MSPS
–20
fOUT = 1.002MHz
AMPL = 0dBFS
–30
= –8.25dBm
–40
–50
–60
–70
–80
–90
–100
0
5
10
15
20
25
FREQUENCY (MHz)
1666/7/8 G01
4-Tone SFDR, fCLOCK = 5MSPS
0
–10
–20
SFDR > 82dB
–30
fCLOCK = 5MSPS
fOUT1 = 0.5MHz
–40
fOUT2 = 0.65MHz
–50
fOUT3 = 1.10MHz
fOUT4 = 1.25MHz
–60
AMPL = 0dBFS
–70
–80
–90
–100
–110
0.1 0.46 0.82 1.18 1.54 1.9
FREQUENCY (MHz)
1666/7/8 G04
2-Tone SFDR
0
–10
–20
–30
SFDR > 86dB
fCLOCK = 50MSPS
fOUT1 = 4.9MHz
fOUT2 = 5.09MHz
AMPL = 0dBFS
–40
–50
–60
–70
–80
–90
–100
4.5
5.0
5.5
FREQUENCY (MHz)
1666/7/8 G02
SFDR vs fOUT and fCLOCK
100
5MSPS
90
25MSPS
80
50MSPS
70
60
50
0.1
DIGITAL AMPLITUDE = 0dBFS
1.0
10
fOUT (MHz)
100
1666/7/8 G05
4-Tone SFDR, fCLOCK = 50MSPS
0
–10
–20
SFDR > 74dB
–30
fCLOCK = 50MSPS
–40
fOUT1 = 5.02MHz
–50
fOUT2 = 6.51MHz
fOUT3 = 11.02MHz
–60
fOUT4 = 12.51MHz
AMPL = 0dBFS
–70
–80
–90
–100
–110
1
4.6 8.2 11.8 15.4 19
FREQUENCY (MHz)
1666/7/8 G03
SFDR vs fOUT and Digital Amplitude
(dBFS) at fCLOCK = 5MSPS
100
95
0dBFS
90 –6dBFS
85 –12dBFS
80
75
70
65
60
55
50
0
0.4
0.8
1.2
1.6
2.0
fOUT (MHz)
1666/7/8 G06
SFDR vs fOUT and Digital Amplitude
(dBFS) at fCLOCK = 25MSPS
95
0dBFS
90
85 –6dBFS
80
–12dBFS
75
70
65
60
55
50
0
2
4
6
fOUT (MHz)
8
10
1666/7/8 G07
SFDR vs fOUT and Digital Amplitude
(dBFS) at fCLOCK = 50MSPS
90
85
0dBFS
80
75
70
–12dBFS –6dBFS
65
60
55
50
0
5
10
fOUT (MHz)
15
20
1666/7/8 G08
SFDR vs fOUT and IOUTFS at
fCLOCK = 25MSPS
95
DIGITAL AMPLITUDE = 0dBFS
90
IOUTFS = 10mA
85
80
75
IOUTFS = 5mA
70
IOUTFS = 2.5mA
65
60
55
50
0
2.5
5
fOUT (MHz)
7.5
10
1666/7/8 G09
5
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