Datasheet

AD9277
Rev. 0 | Page 16 of 48
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0246810121416
SECOND-ORDER H
A
RMONIC DISTORTION (dBc)
INPUT FREQUENCY (MHz)
08181-018
GAIN+ = 1.6V
GAIN+ = 1.0V
GAIN+ = 0.4V
Figure 17. Second-Order Harmonic Distortion vs. Frequency, AIN = −1.0 dBFS
–80
–90
–70
–60
–50
–40
–30
–20
–10
0
0 2 4 6 8 10 12 14 16
THIRD-ORDE
R
H
A
RMONIC DISTORTION (dBc)
INPUT FREQUENCY (MHz)
GAIN+ = 1.6V
GAIN+ = 1.0V
GAIN+ = 0.4V
08181-019
Figure 18. Third-Order Harmonic Distortion vs. Frequency, AIN = −1.0 dBFS
–120
–100
–80
–60
–40
–20
0
–50 –40 –30 –20 –10–45 –35 –25 –15 –5 0
SECOND-ORDER H
A
RMONIC DISTORTION (dBFS)
ADC OUTPUT LEVEL (dBFS)
08181-020
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
Figure 19. Second-Order Harmonic Distortion vs. ADC Output Level
–120
–100
–80
–60
–40
–20
0
–40–45–50 –35 –30 –25 –20 –15 –10 –5 0
THIRD-ORDE
R
H
A
RMONIC DISTORTION (dBc)
ADC OUTPUT LEVEL (dBFS)
08181-021
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
Figure 20. Third-Order Harmonic Distortion vs. ADC Output Level
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
0.4 0.6 0.8 1.0 1.2 1.4 1.6
IMD3 (dBFS)
GAIN+ (V)
8MHz
2.3MHz 5MHz
f
IN2
= f
IN1
+0.01MHz
f
IN1
= –1dBFS, f
IN2
= –21dBFS
08181-022
Figure 21. IMD3 vs. GAIN+
–120
–100
–80
–60
–40
–20
0
–40 –35 –30 –25 –20 –15 –10 –5 0
IMD3 (dBFS)
AMPLITUDE LEVEL (dBFS)
GAIN+ = 0.8V
GAIN+ = 1.6V
GAIN+ = 0V
f
IN1
= 5.00MHz, f
IN2
= 5.01MHz
FUND2 LEVEL = FUND1 LEVEL – 20dB
08181-023
Figure 22. IMD3 vs. Amplitude Level