AD8432 Datasheet, PDF (17/28 Pages) Analog Devices – Dual-Channel Ultralow Noise Amplifier with Selectable Gain and Input Impedance

10MHz
1MHz
R_FB
0.1µF
X _MULTIPLIER
0.1µF _INH
Y
R_SH
C_SH
INL
0.1µF
0.1µF
AD8432 0.1µF
LNA1
499Ω
499Ω
5pF
DIFF
PROBE
OSCILLOSCOPE
CH1
5pF
Figure 56. Overdrive Recovery Measurements
NETWORK
ANALYZER
50Ω OUT
R_SH
C_SH
R_FB
0.1µF
499Ω
5pF
0.1µF
INH
OPL
0.1µF
0.1µF
INL
OPH
AD8432
0.1µF
LNA1
499Ω
5pF
Figure 57. Input Impedance vs. Frequency Measurements
R_SH
C_SH
R_FB
0.1µF
0.1µF
INH
INL
0.1µF
OPL
OPH
AD8130
LNA1
0.1µF
0.1µF
NETWORK
ANALYZER
50Ω
499Ω
Figure 58. Output Impedance vs. Frequency Measurements
R_FB 0.1µF
0.1µF
INH1
R_S
0.1µF
INL1
OPL1
0.1µF
OPH1
AD8432 0.1µF
LNA1
+IN
1kΩ
–IN
1kΩ
OUT
AD8129
G = 10
SPECTRUM
ANALYZER
50Ω
Figure 59. Noise Figure Measurements
AD8432
Rev. 0 | Page 17 of 28