Datasheet

AD9279
Rev. 0 | Page 15 of 44
8
7
6
5
4
3
2
1
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
100k 1M 10M 100M
FREQUENCY (Hz)
FREQUENCY (Hz)
PHASE (Degrees) MAGNITUDE (kΩ)
09423-017
100k 1M 10M 100M
Figure 18. LNA Input Impedance Magnitude and Phase, Unterminated
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
0.4 0.6 0.8 1.0 1.2 1.4 1.6
GAIN+ (V)
IMD3 (dBFS)
09423-070
f = 2.3MHz
f = 5MHz
f = 80MHz
f
IN1
= 5.00MHz
f
IN2
= 5.01MHz
FUND1 LEVEL = –1dBFS
FUND2 LEVEL = –21dBFS
Figure 19. IMD3 vs. Gain+
0
–20
–40
–60
–80
–100
–120
–40 –35 –25 –15 –5 0–30 –20 –10
AMPLITUDE LEVEL (dBFS)
IMD3 (dBFS)
09423-071
GAIN = 0
GAIN = 0.8
GAIN = 1.6
f
IN1
= 5.00MHz
f
IN2
= 5.01MHz
FUND2 LEVEL = FUND1 LEVEL = –21dB
Figure 20. IMD3 vs. ADC Output Level