Datasheet

AD8331/AD8332/AD8334
Rev. G | Page 22 of 56
03199-062
22pF
SIGNAL GENERATOR
TO MEASURE GAIN
DISCONNECT FOR
NOISE MEASUREMENT
GAIN
1:1
0.1µF
IN
SPECTRUM
ANALYZER
50
B
A
49.9
50
1
FERRITE
BEAD
120nH
INH
LMD
0.1µF
0.1µF
0.1µF
DUT
Figure 62. Test Circuit—Noise Figure
03199-063
22pF
AD8332
1:1
0.1µF
IN
SPECTRUM
ANALYZER
50
50
SIGNAL
GENERATOR
–6dB
–6dB
28
28
1k
1k
18nF
270
LPF
INH
LMD
0.1µF
0.1µF
0.1µF
DUT
Figure 63. Test Circuit—Harmonic Distortion vs. Load Resistance
03199-114
22pF
AD8332
1:1
0.1µF
IN
SPECTRUM
ANALYZER
50
50
SIGNAL
GENERATOR
–6dB
–6dB
28
28
18nF
270
LPF
INH
LMD
0.1µF
0.1µF
0.1µF
DUT
237
237
Figure 64. Test Circuit—Harmonic Distortion vs. Load Capacitance
03199-065
INH
0.1µF
SPECTRUM
ANALYZER
INPUT
50
22pF
–6dB
SIGNAL
GENERATORS
COMBINER
–6dB
50
–6dB
50
–6dB
+22dB
+22dB
FB*
120nH
*FERRITE BEAD
18nF
28
237
237
28
274
LMD
0.1µF
DUT
0.1µF
0.1µF
1:1
Figure 65.Test Circuit—IMD3 vs. Frequency