ADS62P49 / ADS62P29
ADS62P48 / ADS62P28
SLAS635A–APRIL 2009–REVISED JUNE 2009............................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS – ADS62P49
All plots are at 25°C, AVDD = 3.3 V, DRVDD = 1.8 V, maximum rated sampling frequency, sine wave input clock. 1.5 VPP
differential clock amplitude, 50% clock duty cycle, –1 dBFS differential analog input, internal reference mode, 0 dB gain,
LVDS output interface, 32K point FFT (unless otherwise noted)
FFT FOR 20 MHz INPUT SIGNAL
FFT FOR 170 MHz INPUT SIGNAL
0
−20
0
−20
SFDR = 89.5 dBc
SFDR = 75 dBc
SINAD = 73.1 dBFS
SNR = 73.2 dBFS
THD = 88.1 dBc
SINAD = 69.5 dBFS
SNR = 70.7 dBFS
THD = 74.5 dBc
−40
−40
−60
−60
−80
−80
−100
−120
−140
−100
−120
−140
0
0
0
25
50
75
100
125
0
0
0
25
50
75
100
125
f − Frequency − MHz
f − Frequency − MHz
G001
G002
Figure 15.
Figure 16.
FFT FOR 300 MHz INPUT SIGNAL
FFT FOR 2-TONE INPUT SIGNAL
0
−20
0
−20
SFDR = 76.5 dBc
SINAD = 67.6 dBFS
SNR = 68.6 dBFS
THD = 73.6 dBc
f
f
1 = 185 MHz, –7 dBFS
2 = 190 MHz, –7 dBFS
2-Tone IMD = –85 dBFS
SFDR = 90.2 dBc
IN
IN
−40
−40
−60
−60
−80
−80
−100
−120
−140
−100
−120
−140
25
50
75
100
125
25
50
75
100
125
f − Frequency − MHz
f − Frequency − MHz
G003
G004
Figure 17.
Figure 18.
FFT FOR 2-TONE INPUT SIGNAL
SFDR vs INPUT FREQUENCY
0
−20
92
88
84
80
76
72
68
64
f
f
1 = 185 MHz, –36 dBFS
2 = 190 MHz, –36 dBFS
2-Tone IMD = –100 dBFS
SFDR = 96.6 dBc
IN
IN
−40
−60
−80
−100
−120
−140
25
50
75
100
125
50 100 150 200 250 300 350 400 450 500
f − Frequency − MHz
f
IN
− Input Frequency − MHz
G005
G006
Figure 19.
Figure 20.
36
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