ADS62P49 / ADS62P29
ADS62P48 / ADS62P28
www.ti.com............................................................................................................................................................. SLAS635A–APRIL 2009–REVISED JUNE 2009
TYPICAL CHARACTERISTICS – ADS62P48
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 = 84.1 dBc
SFDR = 77.4 dBc
SINAD = 70.1 dBFS
SNR = 70.9 dBFS
THD = 77 dBc
SINAD = 73.1 dBFS
SNR = 73.4 dBFS
THD = 83.5 dBc
−40
−40
−60
−60
−80
−80
−100
−120
−140
−100
−120
−140
0
0
0
20
40
60
80
100
0
0
0
20
40
60
80
100
f − Frequency − MHz
f − Frequency − MHz
G018
G020
G022
G019
Figure 32.
Figure 33.
FFT FOR 300 MHz INPUT SIGNAL
FFT FOR 2-TONE INPUT SIGNAL
0
−20
0
−20
SFDR = 70.1 dBc
f
f
1 = 185 MHz, –7 dBFS
2 = 190 MHz, –7 dBFS
IN
SINAD = 66 dBFS
SNR = 68.8 dBFS
THD = 68.2 dBc
IN
2-Tone IMD = –84.7 dBFS
SFDR = –97.2 dBc
−40
−40
−60
−60
−80
−80
−100
−120
−140
−100
−120
−140
20
40
60
80
100
20
40
60
80
100
f − Frequency − MHz
f − Frequency − MHz
G021
Figure 34.
Figure 35.
FFT FOR 2-TONE INPUT SIGNAL
SFDR vs INPUT FREQUENCY
0
−20
92
88
84
80
76
72
68
f
f
1 = 185 MHz, –36 dBFS
2 = 190 MHz, –36 dBFS
IN
IN
2-Tone IMD = –107.1 dBFS
SFDR = –98.8 dBc
−40
−60
−80
−100
−120
−140
20
40
60
80
100
50 100 150 200 250 300 350 400 450 500
f − Frequency − MHz
f
IN
− Input Frequency − MHz
G023
Figure 36.
Figure 37.
Copyright © 2009, Texas Instruments Incorporated
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