ADS5474_14 Datasheet, PDF (14/41 Pages) Texas Instruments – 14-Bit, 400-MSPS Analog-to-Digital Converter

ADS5474
SLAS525B – JULY 2007 – REVISED FEBRUARY 2012
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TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C, sampling rate = 400 MSPS, 50% clock duty cycle, 3-V_PP differential sinusoidal clock, analog input amplitude
= –1 dBFS, AVDD5 = 5 V, AVDD3 = 3.3 V, and DVDD3 = 3.3 V, unless otherwise noted.
AC PERFORMANCE
vs
INPUT AMPLITUDE (70 MHz Input Signal)
AC PERFORMANCE
vs
INPUT AMPLITUDE (230 MHz Input Signal)
120
120
SFDR (dBFS)
100
SFDR (dBFS)
100
SNR (dBFS)
80
SNR (dBFS)
80
60
60
40
SFDR (dBc)
20
40
SFDR (dBc)
20
0
SNR (dBc)
-20
f_S = 400 MSPS
f_IN = 70 MHz
-40
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0
Input Amplitude - dBFS
Figure 18.
TWO-TONE PERFORMANCE
vs
INPUT AMPLITUDE (f₁ = 297.5 MHz and f₂ = 302.5 MHz)
100
2f₂ - f₁ (dBc)
90
80
2f₁ - f₂ (dBc)
70
60
50
40
30
20
Worst Spur (dBc)
10
0
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0
A_IN - dBFS
Figure 20.
0
SNR (dBc)
-20
f_S = 400 MSPS
f_IN = 230 MHz
-40
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0
Input Amplitude - dBFS
Figure 19.
SFDR
vs
AVDD5 OVER TEMPERATURE
90
f_S = 400 MSPS
88 ^fIN ^{= 230 MHz}
86
84
+40°C
82
+65°C
+25°C
80
78
76
-40°C
74
0°C +85°C
+100°C
72
70
4.7
4.8
4.9
5.0
5.1
5.2
5.3
AVDD5 - Supply Voltage - V
Figure 21.
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