Datasheet

AD8337
Rev. C | Page 15 of 32
50Ω
IN
SPECTRUM ANALYZE
R
PrA
3
4
1
5
100Ω
49.9Ω
100Ω
7
AD8337
+
–
0Ω
0Ω
V
GAIN
05575-050
Figure 50. Input-Referred and Output-Referred Noise
NOISE FIGURE METER
AD8337
100Ω
5
3
4
PrA
+
–
1
100Ω
7
49.9Ω
(OR ∞)
INPUT
0Ω
0Ω
NOISE
SOURCE
DRIVE
NOISE
SOURCE
V
GAIN
05575-051
Figure 51. Noise Figure vs. V
GAIN
SPECTRUM ANALYZER
AD8337
100Ω
5
3
4
PrA
+
–
1
100Ω
7
49.9Ω
INPUT
20Ω
LOW-
PASS
FILTER
SIGNAL
GENERATOR
C
L
50Ω
R
L
V
GAIN
05575-052
Figure 52. Harmonic Distortion
OSCILLOSCOPE
CH2
50Ω
OUT
50Ω
CH1
PULSE
GENERATOR
20Ω 453Ω
56.2Ω
0.7V
POWER
SPLITTER
100Ω
05575-053
AD8337
5
3
4
PrA
+
–
1
100Ω
7
49.9Ω
Figure 53. Pulse Response
OSCILLOSCOPE
AD8337
100Ω
5
3
4
PrA
+
–
1
100Ω
7
CH2
50Ω
DIFFERENTIAL
FET PROBE
50Ω
CH1
DUAL
FUNCTION
GENERATOR
V
GAIN
05575-054
20Ω 453Ω
NC
POWER
SPLITTER
SQUARE
WAVE
49.9Ω
SINE
WAVE
Figure 54. Gain Response
OSCILLOSCOPE
AD8337
100Ω
5
3
4
PrA
+
–
1
100Ω
7
CH2
50Ω
CH1
FUNCTION
GENERATOR
05575-055
NC
OUTPUT
49.9Ω
100Ω
NC
Figure 55. Preamp Overdrive Recovery