THS1240 Datasheet, PDF (14/20 Pages) Texas Instruments – 12-BIT 40 MSPS IF SAMPLING COMMUNICATIONS ANALOG-TO-DIGITAL CONVERTER

THS1240
12-BIT 40 MSPS IF SAMPLING COMMUNICATIONS
ANALOG-TO-DIGITAL CONVERTER
SLAS279D – JUNE 2000 – REVISED JANUARY 2001
TYPICAL CHARACTERISTICS
OUTPUT POWER SPECTRUM
0
–10 _{FS = 40 MSPS}
–20 _{fIN = 69 MHz}
–30 _{VIN = –2 dBFS}
–40 8K Point Discrete
–50 Fourier Transform
–60
–70
–80
–90
–100
–110
0
5
10
15
20
f – Frequency – MHz
Figure 19
TWO-TONE OUTPUT POWER SPECTRUM
0
–10 _{FS = 40 MSPS}
–20 _{fIN = 14.9 MHz and 15.6 MHz}
–30 _{VIN = –8 dBFS Each}
–40 8K Point Discrete
–50 Fourier Transform
–60
–70
–80
–90
–100
–110
0
5
10
15
20
f – Frequency – MHz
Figure 20
100
90 ^{FS = 40 MSPS}
fIN = 15.5 MHz
80
DYNAMIC POWER PERFORMANCE
vs
ANALOG INPUT POWER
SNR (dB)
3rd Harmonic (dBc)
70
60
50
D
40
SINAD (dB)
2nd Harmonic (dBc)
SFDR (dBc)
30
–60
–50
–40
–30
–20
–10
0
Analog Input Power – dBFS
Figure 21
14
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