Datasheet

AD9273
Rev. B | Page 17 of 48
0
25
50
75
100
125
150
0 5 10 15 20 25 30 35 40
GROUP DELAY (ns)
FREQUENCY (MHz)
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
07030-121
Figure 18. Antialiasing Filter (AAF) Group Delay Response
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0 2 4 6 8 10 12 14 16
SECOND-ORDER H
A
RMONIC DISTORTION (dBFS)
INPUT FREQUENCY (MHz)
GAIN+ = 1.6V
GAIN+ = 1.0V
GAIN+ = 0.5V
07030-122
Figure 19. Second-Order Harmonic Distortion vs. Input Frequency,
AIN = −1.0 dBFS
–80
–70
–60
–50
–40
–30
–20
–10
0
0246810121416
THIRD-ORDER HARMONIC DISTORTION (dBFS)
INPUT FREQUENCY (MHz)
GAIN+ = 1.6V
GAIN+ = 1.0V
GAIN+ = 0.5V
07030-123
Figure 20. Third-Order Harmonic Distortion vs. Input Frequency,
AIN = −1.0 dBFS
–120
–100
–80
–60
–40
–20
0
–40 –35 –30 –25 –20 –15 –10 –5 0
SECOND-ORDER HARMONIC DISTORTION (dBFS)
ADC OUTPUT LEVEL (dBFS)
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
07030-124
Figure 21. Second-Order Harmonic Distortion vs. ADC Output Level
–120
–100
–80
–60
–40
–20
0
–40 –35 –30 –25 –20 –15 –10 –5 0
THIRD-ORDER HARMONIC DISTORTION (dBFS)
ADC OUTPUT LEVEL (dBFS)
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
07030-125
Figure 22. Third-Order Harmonic Distortion vs. ADC Output Level
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.5 0.6 0.7 0.9 1.1 1.3 1.50.8 1.0 1.2 1.4 1.6
IMD3 (dBFS)
GAIN+ (V)
f
IN1
= f
IN2
+0.01MHz
A
IN
1 = –1dBFS, A
IN
2 = –21dBFS
07030-126
8MHz
5MHz
2.3MHz
Figure 23. IMD3 vs. GAIN+